WO2016116843A1

WO2016116843A1 - Dual-valve device for aspiration and injection of fluids

Info

Publication number: WO2016116843A1
Application number: PCT/IB2016/050212
Authority: WO
Inventors: Adolf Victor D'SOUZA; Arafat Nasir KHAN
Original assignee: D Souza Adolf Victor; Khan Arafat Nasir
Priority date: 2015-01-19
Filing date: 2016-01-16
Publication date: 2016-07-28

Abstract

A dual-valve device for aspiration and injection of fluids has been disclosed which can be used for multipurpose applications with or without needles and used in the process of either injecting or aspirating. The construction of the dual-valve device allows for calibration of the device as per market requirements.

Description

DUAL- VALVE DEVICE FOR ASPDIATION AND INJECTION OF FLUIDS

TECHNICAL FIELD

[0001] The present disclosure relates to technical field of medical devices. More particularly, the disclosure pertains to a dual valve device that can be used both for injection and aspiration of fluids.

BACKGROUND

[0002] The background description includes information that may be useful in understanding the present disclosure. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.

[0003] Administration of medication and withdrawal of body fluids for transfusion, biopsy, testing and analysis during treatment of patients is now a routine requirement. Many devices such as syringes, injections, etc., have been developed to allow nurses, doctors, medical attendants and even untrained persons to ensure that injection of medication and drawing of samples is done correctly and easily. These devices need to be fail safe and ensure that no harm is caused to or damage inflicted on the patients. Further it has to be ensured that no contamination or leakage of medicines or samples takes place during the process of administration and/or sample collection because contamination or leakage can be hazardous, defeat the purpose of medical treatment and corrupt the test results. Because of this much care is taken during designing, manufacture and use of such devices.

[0004] Prior art EP0075039A1 teaches a backflow check valve for use in IV administration sets wherein a flow control disc is located between the two hubs to permit flow in one direction, but to prevent flow in the other direction and wherein a disc abutment means is mounted on the male hub to prevent the disc from becoming dislodged and moving into the male hub flow passage. Flow bypass paths are defined in the male hub element so that flow can bypass the flow control disc when fluid communication between the male and female hub flow passages is desired. [0005] Prior art US4729401 teaches an aspiration assembly having dual co-axial check valves to provide a dual valve function during administration of fluids and additional liquids in medical environments.

[0006] Dual-valve systems are known in the art suffer from one or more disadvantages such as inability to hold both body and atmospheric pressure, inability to operate at high pressures, unsuitable for high viscosity fluids, sensitivity to temperature fluctuations on account of use of disk type diaphragm, requirement of multiple attachments for use, proliferation of parts and requirement of automation for assembly during manufacture, expensive to produce, unsuitable for use with needles etc.

[0007] Thus, there is a requirement to provide a multi-purpose dual-valve device that overcomes the limitations of the existing dual valve devices, is not based on disc type check valves and can be used with or without needles.

[0008] All publications herein are incorporated by reference to the same extent as if each individual publication or patent application were specifically and individually indicated to be incorporated by reference. Where a definition or use of a term in an incorporated reference is inconsistent or contrary to the definition of that term provided herein, the definition of that term provided herein applies and the definition of that term in the reference does not apply.

[0009] In some embodiments, the numbers expressing quantities of ingredients, properties such as concentration, reaction conditions, and so forth, used to describe and claim certain embodiments of the invention are to be understood as being modified in some instances by the term "about." Accordingly, in some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable. The numerical values presented in some embodiments of the invention may contain certain errors necessarily resulting from the standard deviation found in their respective testing measurements. [00010] As used in the description herein and throughout the claims that follow, the meaning of "a," "an," and "the" includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of "in" includes "in" and "on" unless the context clearly dictates otherwise.

[00011] The recitation of ranges of values herein is merely intended to serve as a shorthand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each individual value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g. "such as") provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.

[00012] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all Markush groups used in the appended claims.

OBJECTS OF THE INVENTION

[00013] It is an object of the present disclosure to provide a dual-valve device for aspiration and injection of fluids.

[00014] It is an object of the present disclosure to provide a dual-valve device that incorporates two luers for aspiration and injection of fluids respectively.

[00015] It is an object of the present disclosure to provide a dual-valve device that can be used with or without needles.

[00016] It is an object of the present disclosure to provide a dual-valve device that can hold high pressure. [00017] It is an object of the present disclosure to provide a dual-valve device that incorporates a mechanical auto self-closing system to hold body and atmospheric pressure.

[00018] It is an object of the present disclosure to provide a dual-valve device that can be used for high viscosity fluids without causing malfunctioning of valves.

[00019] It is an object of the present disclosure to provide a dual-valve device that can be used without multiple attachments.

[00020] It is an object of the present disclosure to provide a dual-valve device with linear- spring cylindrical valve and linear-spring hemispherical valves that can withstand temperature fluctuations without malfunctioning.

[00021] It is an object of the present disclosure to provide a dual-valve device that is of simple design and that requires less number of parts and therefore is cheap to manufacture and assemble.

[00022] It is an object of the present disclosure to provide a dual -valve device that can be used for various applications such as in household, industrial, medical, bio-medical, laboratory, etc.

[00023] It is an object of the present disclosure to provide a dual -valve device which can be calibrated for pressure and viscosity of liquid as per market requirements.

[00024] It is an object of the present disclosure to provide a dual -valve device that offers flexibility in use of attachments.

[00025] It is an object of the present disclosure to provide an automatic spring-return syringe that can be used on as required basis for automatic aspiration of fluids.

[00026] It is an object of the present disclosure to provide a dual-valve device having both the valves of same kind, i.e. either hemispherical or cylindrical valves

[00027] It is an object of the present disclosure to provide a dual-valve device wherein the two valves are of different type.

SUMMARY

[00028] The present disclosure relates to a dual- valve device for aspiration and injection of fluids. It is to be appreciated that though various embodiments of the present disclosure have been explained with references to medical applications such as injection of medication or other fluids into a patient or aspiration of body fluids for tests or transfusion, the disclosed device can as well be used for other applications such as for transfer of fluids in household or industrial setups and all such applications are well within the scope of the present disclosure.

[00029] In an aspect, the disclosed dual-valve device can be implemented in a valve housing that can incorporate two or more luers, each configured with a one way valve that can be configured to allow movement of fluid in one or other direction, and block movement in opposite direction. In another aspect, if a luer is configured with a valve that allows fluid to move out of the luer while blocking in-flow, it functions as injection luer. On the other hand, if a luer is configured with a valve that allows fluid to move into the luer while blocking out-flow, it functions as aspiration luer.

[00030] In an embodiment, the valve housing can incorporate further luers to function as syringe luers. In an aspect, the valve housing can be multi-sided having multiple luers. In the preferred embodiment, the valve body can be configured with four luers, two of which can be configured to house valves and the other two to hold a syringe. In another aspect, the valve housing can be configured to have a syringe luer against each luer that houses valves. In an aspect, positioning of a syringe luer against each luer that houses valves enables operation of the disclosed dual valve device either in aspiration or injection mode by positioning a syringe appropriately.

[00031] In an embodiment, valves of the disclosed dual valve device can be hemispherical valve or cylindrical valve, wherein cylindrical valve is much more sensitive than hemispherical valve and is designed for micro-sensitive pressure to hold both negative & positive pressures. In an embodiment, the hemispherical valve can be configured on aspiration luer, and cylindrical valve can be configured on injection luer. Alternatively both the valves can be of same type i.e. either cylindrical valve or hemispherical valve.

[00032] In another embodiment of the present disclosure, a dual-valve device for aspiration and injection of fluids can be used interchangeably in aspiration mode or injection mode simply by interchanging the position of syringe and end cap that closes the syringe port.

[00033] In another embodiment, the present disclosure provides an automatic spring-return syringe that can be used for automatic aspiration of fluids. In an aspect, a spring can be configured between syringe cylinder and syringe plunger such that syringe plunger can move in to the syringe cylinder when pressed against the spring force, however when the pressure to move the plunger in is removed, the spring can make plunger to move out resulting in aspiration. [00034] In another aspect, the disclosed dual-valve device incorporates interchangeable parts reducing their variety and making their manufacture cost effective. In addition these parts can be made of materials that are compatible for in vivo and in vitro use and such materials can include thermoplastics, polycarbonates, co-polyesters, silicone, etc., and device for medical use can be compliant to USP and ISO 10993 standards.

[00035] In another embodiment, parts and components of a dual-valve device for aspiration and injection of fluids for non-medical use can be manufactured from any material depending on where such device(s) are intended to be used.

[00036] According to another embodiment of the present disclosure, dual valve device can include an aspiration luer with a first valve and an injection luer with a second valve, wherein the first valve allows fluid to move in from the aspiration luer, and wherein the second valve allows the fluid to move out from the injection luer. The device can further include at least one syringe luer, wherein expansion of plunger of a syringe that is configured in the at least one syringe luer enables receiving of the fluid from the aspiration luer and injecting of the fluid through the injection luer. Device of the present disclosure can further include a first syringe luer that is configured opposite to the aspiration luer, and a second syringe luer that is configured opposite to the injection luer, wherein the expansion of the plunger of the syringe can be enabled by means of a spring configured in the syringe along the plunger. In another embodiment, the first valve is a hemispherical valve assembly which includes a hemispherical valve. In another aspect, the second valve is a cylindrical valve assembly, which includes a cylindrical valve. The plunger of the syringe can be initially compressed to allow air in the syringe to flow out from the injection luer, and wherein expansion of the plunger can be done automatically by means of a spring configured in the syringe such that during expansion, the syringe receives the fluid from the aspiration luer and injects the fluid through the injection luer.

[00037] Various objects, features, aspects and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

BRIEF DESCRIPTION OF THE DRAWINGS

[00038] The accompanying drawings are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[00039] FIG. 1 illustrates an exemplary isometric view of dual-valve device for aspiration and injection of fluids in accordance with embodiments of the present disclosure.

[00040] FIG. 2A illustrates an exemplary exploded view of the dual-valve devicein accordance with embodiments of the present disclosure.

[00041] FIG. 2B illustrates an exemplary sectional view of assembled the dual-valve device in accordance with embodiments of the present disclosure.

[00042] FIG. 3A illustrates an exemplary sectional view of the dual-valve devicebeing used in injection mode in accordance with embodiments of the present disclosure.

[00043] FIG. 3B illustrates an exemplary sectional view of the dual-valve devicebeing used in aspiration mode in accordance with embodiments of the present disclosure.

DETAILED DESCRIPTION

[00044] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.

[00045] Each of the appended claims defines a separate invention, which for infringement purposes is recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the "invention" may in some cases refer to certain specific embodiments only. In other cases it will be recognized that references to the "invention" will refer to subject matter recited in one or more, but not necessarily all, of the claims.

[00046] Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition possible in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.

[00047] The present invention relates to a dual -valve device for aspiration and injection of fluids. It is to be appreciated that though various embodiments of the present disclosure have been explained with references to medical applications such as injection of medication or other fluids into a patient or aspiration of body fluids for tests or transfusion, the disclosed device can as well be used for other applications such as for transfer of fluids in household or industrial setups and all such applications are well within the scope of the present disclosure.

[00048] In an aspect the disclosed dual-valve device can be implemented in a valve housing that incorporates two or more luers each configured with a one way valve that can be configured to allow movement of fluid in one or other direction and block the movement in opposite direction. In another aspect if a luer is configured with a valve that allows fluid to move out of the luer while blocking in-flow, it functions as injection luer. On the other hand if a luer is configured with a valve that allows fluid to move in to the luer while blocking out-flow, it functions as aspiration luer.

[00049] In an embodiment the valve housing can incorporate further luers to function as syringe luers. In an aspect the valve housing can be multi-sided having multiple luers. In the preferred embodiment the valve body is configured with four luers two of which are configured to house valves and other two to hold a syringe. In another aspect the valve housing can be configured to have a syringe luer against each luer that houses valves. In another embodiment each of the syringe luer can be configured such that it can be closed by an end cap when not in use.

[00050] In an aspect positioning of a syringe luer against each aspiration/injection luer enables operation of disclosed dual valve device either in aspiration or injection mode by positioning a syringe appropriately. Thus the disclosed dual-valve device can be used interchangeably in aspiration mode or injection mode simply by interchanging the position for syringe and end cap that closes the syringe port.

[00051] In an embodiment the valves of the disclosed dual valve device can be hemispherical valve or cylindrical valve. Cylindrical valve is much more sensitive than hemispherical valve and is designed for micro-sensitive pressure, to hold both negative & positive pressures. In an embodiment the hemispherical valve can be configured on aspiration luer and cylindrical valve can be configured on injection luer.

[00052] In another embodiment, either a hemisphere or a cylindrical valve can be provided in both the luers i.e. in aspiration luer and injection luer. Alternatively, there can be mixed valve in the device i.e. a hemispherical valve in one luer and cylindrical valve in the other luer.

[00053] In another embodiment the disclosed device can have multiple valves instead of only two described above with a hemispherical valve on each aspiration side and a cylindrical valve on each injection side.

[00054] In another embodiment, the present disclosure provides an automatic spring- return syringe that can be used for automatic aspiration of fluids. In an aspect a spring is configured between syringe cylinder and syringe plunger such that syringe plunger can move in to the syringe cylinder when pressed against the spring force, however when the pressure to move the plunger in is removed, the spring can make plunger to move out resulting in aspiration.

[00055] In another aspect, the disclosed dual-valve device incorporates interchangeable parts reducing their variety and making their manufacture cost effective. In addition these parts can be made of materials that are compatible for in vivo and in vitro use and such materials can consists of thermoplastics, polycarbonates, co-polyesters, silicone, etc., and device for medical use can be compliant to USP and ISO 10993 standards.

[00056] In another embodiment, parts and components of a dual-valve device for aspiration and injection of fluids for non-medical use can be manufactured from other materials depending on their intended use.

[00057] FIG. 1 illustrates an exemplary isometric view 100 of a dual -valve device for aspiration and injection of fluids in accordance with embodiments of the present disclosure. The disclosed device 100 can be implemented within a valve housing 102 and can incorporate multiple luers. In the exemplary embodiment the valve housing 102 incorporates four luers two of which are configured to function as aspiration/injection luers 104 and other two as syringe luers 106. Each of the aspiration/injection luers can be configured with a one way valve that can be configured to allow movement of fluid in one or other direction and block the movement in opposite direction. In another aspect if a luer is configured with a valve that allows fluid to move out of the luer while blocking in-flow, it functions as injection luer. On the other hand if a luer is configured with a valve that allows fluid to move in to the luer while blocking out-flow, it functions as aspiration luer.

[00058] In another embodiment, the valves are retained in position within the respective luer by a lock such as injection male-luer lock 110 and aspiration male-luer lock 108. In addition each of the aspiration/injection luers can incorporate a thread-luer lock 112 for locking syringe- needle by thread application.

[00059] In another embodiment the syringe luers 106 can be configured to receive a syringe and also to facilitate closing of luer by an end cap such as 114 when not holding a syringe.

[00060] As can be seen a syringe luer 106 is positioned against each aspiration/injection luerl04. In an embodiment positioning of a syringe luer 106 against each aspiration/injection luer 104 enables operation of disclosed dual valve device either in aspiration or injection mode by positioning a syringe appropriately.

[00061] In an aspect, valve housing 102 can be manufactured from any suitable rigid material and functions to house the parts and components of dual-valve device of present disclosure. In another aspect, both aspiration and injection functions can be performed using dual-valve device 100 of present disclosure such that there can be no contamination or leakage of the fluids or medication during the process of aspiration or injection. In another aspect, syringe luers 106 can be used for coupling of any syringe with the main valve housing body 102 of dual- valve device of the present disclosure. In another aspect, syringe with and without automatic return springs can be coupled to main valve housing body 102 of dual valve device of the present disclosure through syringe luers 106. In another aspect, injection male-luer lock 110, aspiration male-luer lock 108 and thread-luer locks 112 can be used for coupling/attaching different types of attachments to main valve housing body 102 for use in different applications. In an embodiment, luer type syringes can be coupled to injection male-luer lock 110 and aspiration male-luer lock 108 and dual -valve device 100 of present system and can be used for aspiration and injection of fluid. In another aspect, syringe can be coupled on the aspiration male-luer lock 108 and bottle or sample collector container can be connected to either syringe luer 106 or injection male-luer lock 110 and fluid extracted through aspiration luer 104 can be directly transferred to the bottle or sample collector container thus ensuring that the sample extracted is not exposed to environment. In yet another aspect, a medicine bottle can be connected to aspiration male-luer lock 108 or threaded luer lock 112 and syringe connected on injection male- luer lock 110, and needle of such syringe can be connected to body which is required to be injected with medicine, wherein medicine can then directly be extracted from the medicine bottle and injected into the body using dual -valve device of the present disclosure. In an aspect, the said dual-valve device of the present disclosure can be used for extracting printer ink from a bottle or container and filling into a printer cartridge.

[00062] One should clearly be able to comprehend that all these are clearly exemplary embodiments and such method can easily be implemented as desired/ configured on any other type of system, all of which are completely within the scope of the present disclosure. One should further understand that the present embodiment has been explained as a medical device but dual-valve device of present disclosure can find application in other fields such as household, industrial, other applications and all such applications are within the scope of present disclosure.

[00063] FIG. 2A illustrates an exemplary exploded view 200 of the dual-valve device for aspiration and injection of fluids in accordance with embodiments of the present disclosure. Depicted in the exploded view 200 are all parts and components of dual- valve devicelOO of present disclosure. In an aspect, each of the luers 104/106 of the valve housing 102 can have cavities such as cylindrical cavities to house internal components - valves in case of aspiration/injection luers 104 and syringe in case of syringe luers 106. These cavities can be interconnected to each other to facilitate transfer of fluids from one luer to other as required.

[00064] In an embodiment, construction and dimensional features of two syringe luers 106 including their internal cavities can be identical. This is because both are configured to receive similar syringes. However in special applications they may be different configured to receive syringes of different configurations. In another aspect, construction and dimensions features of two aspiration/injection luers 104 can differ depending on function i.e. aspiration or injection they are configured to do.

[00065] In an embodiment each of the aspiration/injection luers 104 can be configured with a one way valve that can allow movement of fluid in one or other direction and block the movement in opposite direction. In another aspect if a luer 104 is configured with a valve that allows fluid to move out of the luer while blocking in-flow, it functions as injection luer. On the other hand if a luer is configured with a valve that allows fluid to move in to the luer while blocking out-flow, it functions as aspiration luer. FIG.2A depicts valves 202 and 210 wherein valve 202 can comprise a hemispherical valve 208, a valve sleeve 206 and a micro valve spring 204 and on account of hemispherical construction can be called hemispherical valve assembly 202. Valve 210 can comprise a cylindrical valve 214, a valve sleeve 212 and a micro valve spring 216 and on account of cylindrical construction can be called cylindrical valve assembly 210.

[00066] In an embodiment valve sleeve 206 and valve sleeve 212 can hold hemispherical valve 208 and cylindrical valve 214 respectively. These can also guide the linear vector position and pressure of the micro valve springs 204 and 216 to maintain their specific positions to open and lock the respective passages. In an embodiment, valve sleeve 206 and valve sleeve 212 can be identical thus reducing variety and number of components in the device.

[00067] In an embodiment the cylindrical valve assembly 210 can be much more sensitive than hemispherical valve assembly 202 and is designed for micro-sensitive pressure, to hold both negative & positive pressures. In an embodiment the hemispherical valve assembly 202 can be configured on aspiration luer and cylindrical valve can be configured on injection luer.

[00068] In another embodiment the micro valve springs 204 and 216 can be made with different stiffness depending on requirement. Such a requirement may arise when the device 100 is to handle fluids of different viscosity. In an aspect the stiffness of the micro valve springs 204 and 216 can determine the pressure at which respective valve can open or close. Thus use of micro valve springs 204 and 216 with different stiffness can help in calibrating the device for different pressures and for handling fluids of differing viscosity as per market requirements.

[00069] Both the valve assemblies, hemispherical valve assembly 202 and cylindrical valve assembly 210 can be housed within cavities of respective luers and held in position by respective luer locks i.e. Aspiration male-luer lock 108 and injection male-luer lock 110. In aspect the aspiration male-luer lock 108 and injection male-luer lock 110 can additionally help in attachment of syringe needle to respective luers during their use for aspiration and/or injection of fluids.

[00070] In another embodiment dual-valve device 100 can incorporate interchangeable parts reducing their variety and making their manufacture cost effective. For example valve sleeve 206 can be identical to valve sleeve 212 and micro valve spring 204 can be identical to micro valve spring 216. Similarly, aspiration male-luer lock 108 and injection male-luer lock 110 can also be made identical to reduce variety and making their manufacture cost effective.

[00071] FIG.2A further shows a syringe 218 that can comprise syringe cylinder 220 (also referred to as cylinder), syringe plunger 224 (also referred to as plunger) and syringe spring 226. In an aspect syringe cylinder 220 can be used for suction & compression of fluid by physical method. Syringe plunger 224 can move in linear direction inside the syringe cylinder 220 for creating negative & positive pressure inside the syringe cylinder 220. Syringe spring 226 can be used for return of syringe plunger to starting position after pressure applied on to push forward has been released.

[00072] In an embodiment, the syringe 218 depending on requirement can be positioned on one of the syringe luer 106 i.e. against aspiration luer or against injection luer and used for aspiration/ injection of fluids depending on requirement. In another aspect the syringe218can be used for automatic aspiration of fluids. In an aspect the syringe spring 226 configured between syringe cylinder 220 and syringe plunger 226 can make syringe plunger 226 to move out from syringe cylinder 220 when the pressure to move the plunger in is removed, resulting in aspiration.

[00073] FIG. 2B illustrates an exemplary sectional view 250 of assembled dual -valve devicelOO in accordance with embodiments of the present disclosure. As shown, both the valves, hemispherical valve assembly 202 and cylindrical valve assembly 210 can be housed in the cavities of respective luer and held in position by respective luer locks i.e. aspiration male-luer lock 108 and injection male-luer lock 110 to complete the dual valve device 100 assembly. As can be seen hemispherical valve assembly 202 can function to permit flow of fluid into the luer but prevent its out flow. Therefore luer housing hemispherical valve assembly 202 can function as aspiration luer 252. Similarly cylindrical valve assembly 210 can function to permit flow of fluid out of the luer but prevent its inflow. Therefore luer housing cylindrical valve assembly 210 can function as injection luer 254

[00074] FIG. 3A illustrates an exemplary sectional view 300 of the dual-valve devicelOO being used in injection mode in accordance with embodiments of the present disclosure. As shown in view 300 the syringe 218 can be positioned in a syringe luer opposite injection luer 254 so that syringe 218 is in alignment with luer 254. In the initial position, plunger 228 of the syringe 218 can be in withdrawn position such that syringe spring 226 can be in extended position. Further injection luer254 can be connected or coupled to a body or system (not shown), either directly or through a needle or any other suitable device, which is to be injected with a fluid and aspiration luer252 can be connected to a system (not shown) from which the fluid to be injected can be withdrawn. In the initial position, both hemisphere valveassembly202 and cylindrical valve assembly 210 can hold atmospheric and body pressure because of the micro valve springs 204/216 keeping hemispherical valve 208 and cylindrical sleeve valve 214 in closed position.

[00075] In an embodiment when the syringe plunger 228 is pressed, syringe spring 226 can get compressed and plunger 228 can be pressed into syringe cylinder 220 increasing pressure inside syringe cylinder220. The increased pressure can act on cylindrical sleeve valve 214 making it to move compressing micro valve spring 216 and opening the cylindrical valve assembly 210. Opening of cylindrical valve assembly 210can release the pressure through injection luer254. The hemispherical valve 208 remains seated in its position because of the force exerted by micro valve spring 204 and the pressure created by plunger 228 of syringe 218. When the pressure on syringe plunger 228 is released, plunger 228 can move back linearly backward inside syringe cylinder 220 under force from syringe spring 226 and create a vacuum inside the dual valve device 100. The created vacuum can exert a force on hemispherical valve 208 to make it move back compressing the micro valve spring 204 and opening the hemispherical valve assembly 202. Opening the hemispherical valve assembly 202 can result in fluid to enter through aspiration luer252 into syringe cylinder 220 through the connecting passage. During this time, cylindrical valve assembly 210 can remain in closed position because of vacuum created by withdrawal of syringe plunger 228 and micro valve spring 216.

[00076] Again when syringe plunger 228 is compressed in linear forward direction, syringe spring 226 can get compressed and spring plunger 228 can be pressed into syringe body 220, creating a corresponding pressure inside dual valve device 100 which can make the drawn fluid in the syringe cylinder 220 to move in outward direction and creates a pressure on cylindrical valve 214 and compresses micro valve spring 216 to open the cylindrical valveassembly 210 to open and allow the fluid to pass through injection luer254 to move out of the device 100. During this time hemispherical valveassembly202shall remain in closed position because of the micro valve spring 204 and force created by plunger 228. Thus the disclosed dual valve device 100 allows fluid to be taken in through aspiration luer 252 and injected through injection luer 254 during the whole process of aspiration and injection..

[00077] FIG. 3B illustrates an exemplary sectional view 350 of the dual -valve device being used in aspiration mode in accordance with embodiments of the present disclosure. In an aspect, the working of dual-valve device 100 in aspiration mode can be almost similar to the working of dual-valve device 100 in injection mode and the only difference can be in the coupling of syringe 218 with a syringe luer opposite aspiration luer 252 such that syringe 218 can be in alignment with axis of aspiration luer 252 as depicted in view 350. Further aspiration luer 252 can be connected or coupled to a body or system (not shown), either directly or through a needle or any other device, from which fluid can be aspirated and injection luer 254 can be connected to any body or system (not shown) to which such fluid can be transferred.

[00078] In the initial position, plunger 228 of syringe 218 can be in withdrawn position such that syringe spring 226is in extended position. In this position, both hemisphere valve assembly 202 and cylindrical valve assembly 210 can be in closed/hold position because of force exerted by respective micro valve springs 204 and 216.

[00079] On pressing syringe plunger 228, syringe spring 226 can get compressed and spring plunger 228 can be pressed into syringe cylinder220 creating a pressure inside syringe cylinder 220 which can act on cylindrical sleeve valve 214, compress micro valve spring 216 and open the cylindrical valve assembly 210therebyreleasing the pressure through the injection luer254. During this period the hemispherical valve 208 remains in closed position because of the force exerted by micro valve spring 204 and the pressure exerted by plunging of syringe plunger 228. When the pressure on syringe plunger 228is released, syringe spring 226 decompresses making plunger 228 to move linearly backward inside syringe cylinder220 and create a vacuum inside the device 100. The created vacuum can create a force on hemispherical valve 208 and due to which micro valve spring 204 can get compresses and allow the hemispherical valve 208 to move opening the hemisphere valve assembly 202. The fluid can now enter through aspiration luer252 and move to syringe 218. During this period, cylindrical sleeve valve 214 can remain in closed position because of vacuum created by withdrawal of syringe plunger 228 and force exerted by micro valve spring 216.

[00080] When the syringe plunger 228 is pressed in linear forward direction, syringe spring 226 can get compressed and plunger 228 can get pressed into syringe cylinder220 creating a pressure inside syringe cylinder220 forcing the fluid to move in outward direction and create a pressure on cylindrical sleeve valve 214 and compresses micro valve spring 216. This can result in cylindrical valve assembly 210 to open and allows the fluid to pass through injection luer254 in outward direction. During this period hemisphere valveassembly202can remain in closed position because of the force of micro valve spring 204 and force created by plunger 228. [00081] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

ADVANTAGES OF THE INVENTION

[00082] The present disclosure provides a dual -valve device for aspiration and injection of fluids.

[00083] The present disclosure provides a dual-valve device that incorporates two luers for aspiration and injection of fluids respectively.

[00084] The present disclosure provides a dual-valve device that can be used with or without needles.

[00085] The present disclosure provides a dual-valve device that can hold high pressure.

[00086] The present disclosure provides a dual-valve device that incorporates a mechanical auto self-closing system to hold body and atmospheric pressure.

[00087] The present disclosure provides a dual-valve device that can be used for high viscosity fluids without causing malfunctioning of valves.

[00088] The present disclosure provides a dual-valve device that can be used without multiple attachments.

[00089] The present disclosure provides a dual-valve device with linear-spring cylindrical valve and linear-spring hemisphere valves that can withstand temperature fluctuations without malfunctioning.

[00090] The present disclosure provides a dual-valve device that is of simple design and that requires less number of parts and therefore is cheap to manufacture and assemble.

[00091] The present disclosure provides a dual-valve device that can be used for various applications such as in household, industrial, medical, bio-medical, laboratory, etc.

[00092] The present disclosure provides a dual-valve device which can be calibrated for pressure and viscosity of liquid as per market requirements. [00093] The present disclosure provides a dual-valve device that offers flexibility in use of attachments.

[00094] The present disclosure provides an automatic spring-return syringe that can be used on as required basis for automatic aspiration of fluids.

Claims

CLAIMS We claim:

1. A multi -valve device (100) for aspiration and injection of fluids, the device comprising plurality of luers, wherein:

at least one of the luers is configured to function as an aspiration luer and incorporates a first valve that allows fluids to only flow into the multi-valve device; at least one of the remaining luers is configured to function as an injection luer and incorporates a second valve that allows fluids to only flow out of the multi-valve device; and further,

at least one of the remaining luers is configured for fitment of a syringe to function as a syringe luer.

2. The device of claim 1, wherein the first valve and the second valve are cylindrical valves.

3. The device of claim 1, wherein the first valve and the second valve are hemispherical valves.

4. The device of claim 1, wherein the first valve is a hemispherical valve.

5. The device of claim 1, wherein the second valve is a cylindrical valve.

6. The device of claim 1, wherein the aspiration luer further incorporates an aspiration male- luer lock, wherein the aspiration male-luer lock is configured for attachment to a system from which fluid is to be aspirated.

7. The device of claim 1, wherein the injection luer further incorporates an injection male- luer lock configured for attachment to a system into which fluid is to be injected.

8. The device of claim 1, wherein the syringe luer is configured to facilitate closing of luer by an end cap when not holding a syringe.