US1814677A - Stopper for pipe lines - Google Patents

Stopper for pipe lines Download PDF

Info

Publication number
US1814677A
US1814677A US449542A US44954230A US1814677A US 1814677 A US1814677 A US 1814677A US 449542 A US449542 A US 449542A US 44954230 A US44954230 A US 44954230A US 1814677 A US1814677 A US 1814677A
Authority
US
United States
Prior art keywords
bulb
stopper
tube
main
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US449542A
Inventor
Fennema Albert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US449542A priority Critical patent/US1814677A/en
Application granted granted Critical
Publication of US1814677A publication Critical patent/US1814677A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K7/00Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
    • F16K7/10Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with inflatable member

Definitions

  • This invention relates to improvements in stoppers for pipe lines and more particularly to an inflatable stopper for gas pipes.
  • One of the objects of the invention is the a provision of a pipe stopper which can be quickly and easily inserted through a tap opening in a gas main and inflated in order to provide a stopper for the main and includes means for properly retaining the inllated member securely in the main so as to provide an eflicient stopper.
  • a stopper of this character which includes an inflatable bulb applied to a comparatively rigid stem, the bulb being inserted into a gas main through an opening tapped for the purpose and the rigid tube retained in operative position by means of a stopper adapted to be fitted in the tapped opening 29 around the tube, so as to properly center the bulb with respect to the main and then inflate the bulb until the exterior thereof is brought into intimate contact with the inner wall of the main, thus forming a complete stopper for the gas main.
  • Figure 1 is a side elevation of my improved device, illustrating a portion of the gas main in cross section; and showing how the device placed in position, and
  • Figure 2 is a similar View with the improved stopper in operative position.
  • 1 indicates a gas main and at any desired point within the main there 1s a tap opening 2.
  • the stoppers in use at the present time which include an inflatable bulb, usually have attached thereto a flexible tube which is inserted through the opening 2 in the gas main and, consequently, it is rather difficult to properly center the bulb so that when it is inflated, it will provide an effic ent stopper,
  • the mam ob ects of this invention to provide improved means for 0 properly centering the bulb in the gas maln sothat when it is inflated, it will have its exterior moved into intimate contact with the interior ofthe pipe or main, and the in, flation will equalize this contact throughout the circumference of the bulb due to the proper centering of the bulb by means of the stem attached thereto.
  • the bulb 3 is preferably of rubberand adapted to be inflated to the position shown in Figure 2.
  • the bulb has a flexible tubular stem 4 and passed through this stem is one end of an angular tube 5 which extends into the bulb 3 and projects nearly the full length of the bulb,- as illustrated in Figure 2, while the other end of the tube 5 passes out through the opening 2 and is connected to a valve 6 which controls the pressure of air through the conduit Z that leads to the usual type of pump.
  • the bulb 3 in its deflated position can be rolled around one end of the tube 5 and inserted through the opening 2, as shown in Figure 1.
  • a plug 8 is mounted upon one end of the tube 5 and is adapted to fit within the opening 2.
  • This plug 8 is slidably mounted upon the tube 5 so that as soon as the tube is properly positioned with regard to the center of the gas main, the plug 8 is fitted within the opening 2 for retaining the tube in proper position.
  • valve 6 After the inner end of the tube and the bulb 3 have been properly centered with respect to the gas main, air is admitted into the tube 5 by means of the valve 6, and as soon as the tube has been inflated, the valve can be turned to cut off the supply of air and, if found desirable, the conduit 7 can be removed from the valve portion and the bulb 3 all-owed to remain in the pipe or main.
  • the bulb Upon deflation, the bulb can be easily removed by tilting the tube 5 to the position shown in Figure 1. It has been found that by using a comparatively stiff tube for supporting the bulb in position that the bulb can be quickly centered and retained in a central position by means of the plug 8, and when the bulb is inflated it will provide a very eflicient stopper for the gas main.
  • the device is extremely simple and can be manufactured and placed on the market at a very low cost, and as the tube 5 is a comparatively rigid tube, it will securely hold the bulb 3 in a central position and prevent the same from moving about while being inflated, so that when it is inflated, the exterior thereof will contact equally throughout the inner circumference of the gas main.
  • One of the principal advantages of this invention is the fact that the bulb can be inserted into the gas main and the plug 8 can then be positioned in the tap opening 2 to cut off any gas escaping through this opening, and it will not be necessary to inflate the bulb until desired.
  • the use of various types of pipe line stoppers now in the market it is necessary to immediately inflate the bulb after the same has been placed in the gas main, due to the fact that no provision is made for closing the tap opening through which the device is inserted.
  • a gas main stopper including an inflatable bulb having a flexible stem, a rigid tube having one end passed through the stem and into the ball, the ends of said tube being diposed at right angles to each other with a curved portion between said ends, and a yieldable plug slidably mounted upon the other end of the tube.

Description

July 14, 1931. A. FENNEMA STOPPER FOR PIPE LINES Filed May 3, 1930 MIIZIZQES Patented July 14, 1931 UlE SAYS ALBERT FENNEMA, or KEnosnA, Wisconsin STOPPER non, rien Linus Application filed May 3, 1930. Serial No. 449,542.
This invention relates to improvements in stoppers for pipe lines and more particularly to an inflatable stopper for gas pipes.
One of the objects of the invention is the a provision of a pipe stopper which can be quickly and easily inserted through a tap opening in a gas main and inflated in order to provide a stopper for the main and includes means for properly retaining the inllated member securely in the main so as to provide an eflicient stopper.
Another object of the invention is the provision of a stopper of this character, which includes an inflatable bulb applied to a comparatively rigid stem, the bulb being inserted into a gas main through an opening tapped for the purpose and the rigid tube retained in operative position by means of a stopper adapted to be fitted in the tapped opening 29 around the tube, so as to properly center the bulb with respect to the main and then inflate the bulb until the exterior thereof is brought into intimate contact with the inner wall of the main, thus forming a complete stopper for the gas main.
VJith the above and other objects in view, the invention consists in the novel features of construction, the combination and arrange ment of parts hereinafter more fully set forth,
30 pointed out in the claim and shown in the accompanying drawings wherein:
Figure 1 is a side elevation of my improved device, illustrating a portion of the gas main in cross section; and showing how the device placed in position, and
Figure 2 is a similar View with the improved stopper in operative position.
Referring more particularly to the draw ings, 1 indicates a gas main and at any desired point within the main there 1s a tap opening 2. The stoppers in use at the present time, which include an inflatable bulb, usually have attached thereto a flexible tube which is inserted through the opening 2 in the gas main and, consequently, it is rather difficult to properly center the bulb so that when it is inflated, it will provide an effic ent stopper,
It is, therefore, one of the mam ob ects of this invention to provide improved means for 0 properly centering the bulb in the gas maln sothat when it is inflated, it will have its exterior moved into intimate contact with the interior ofthe pipe or main, and the in, flation will equalize this contact throughout the circumference of the bulb due to the proper centering of the bulb by means of the stem attached thereto. V In the present instance, the bulb 3 is preferably of rubberand adapted to be inflated to the position shown in Figure 2. The bulb has a flexible tubular stem 4 and passed through this stem is one end of an angular tube 5 which extends into the bulb 3 and projects nearly the full length of the bulb,- as illustrated in Figure 2, while the other end of the tube 5 passes out through the opening 2 and is connected to a valve 6 which controls the pressure of air through the conduit Z that leads to the usual type of pump.
It will be noted that after the opening 2 has been formed in the main 1, the bulb 3 in its deflated position can be rolled around one end of the tube 5 and inserted through the opening 2, as shown in Figure 1. In order to support the tube 5 in proper position for centering the bulb 3, a plug 8 is mounted upon one end of the tube 5 and is adapted to fit within the opening 2. This plug 8 is slidably mounted upon the tube 5 so that as soon as the tube is properly positioned with regard to the center of the gas main, the plug 8 is fitted within the opening 2 for retaining the tube in proper position. After the inner end of the tube and the bulb 3 have been properly centered with respect to the gas main, air is admitted into the tube 5 by means of the valve 6, and as soon as the tube has been inflated, the valve can be turned to cut off the supply of air and, if found desirable, the conduit 7 can be removed from the valve portion and the bulb 3 all-owed to remain in the pipe or main.
Upon deflation, the bulb can be easily removed by tilting the tube 5 to the position shown in Figure 1. It has been found that by using a comparatively stiff tube for supporting the bulb in position that the bulb can be quickly centered and retained in a central position by means of the plug 8, and when the bulb is inflated it will provide a very eflicient stopper for the gas main. The device is extremely simple and can be manufactured and placed on the market at a very low cost, and as the tube 5 is a comparatively rigid tube, it will securely hold the bulb 3 in a central position and prevent the same from moving about while being inflated, so that when it is inflated, the exterior thereof will contact equally throughout the inner circumference of the gas main.
One of the principal advantages of this invention is the fact that the bulb can be inserted into the gas main and the plug 8 can then be positioned in the tap opening 2 to cut off any gas escaping through this opening, and it will not be necessary to inflate the bulb until desired. l/Vith the use of various types of pipe line stoppers now in the market, it is necessary to immediately inflate the bulb after the same has been placed in the gas main, due to the fact that no provision is made for closing the tap opening through which the device is inserted.
\Vhile I have shown and described the preferred embodiment of my invention, it will be apparent that slight changes may be made in the construction when putting the invention into practice without departing from the spirit of the same or the scope of the appended claim.
I claim:
A gas main stopper including an inflatable bulb having a flexible stem, a rigid tube having one end passed through the stem and into the ball, the ends of said tube being diposed at right angles to each other with a curved portion between said ends, and a yieldable plug slidably mounted upon the other end of the tube.
In testimony that I claim the foregoing I have hereunto set my hand at Ken-osha, in the county of Kenosha and State of WVisconsin.
ALBERT FENNEMA.'
US449542A 1930-05-03 1930-05-03 Stopper for pipe lines Expired - Lifetime US1814677A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US449542A US1814677A (en) 1930-05-03 1930-05-03 Stopper for pipe lines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US449542A US1814677A (en) 1930-05-03 1930-05-03 Stopper for pipe lines

Publications (1)

Publication Number Publication Date
US1814677A true US1814677A (en) 1931-07-14

Family

ID=23784551

Family Applications (1)

Application Number Title Priority Date Filing Date
US449542A Expired - Lifetime US1814677A (en) 1930-05-03 1930-05-03 Stopper for pipe lines

Country Status (1)

Country Link
US (1) US1814677A (en)

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2930396A (en) * 1956-08-20 1960-03-29 S D M Entpr Inc Flood control means
US2976191A (en) * 1958-01-09 1961-03-21 James C Weston Method of killing roots adjacent sewer line joints
US3276481A (en) * 1964-08-13 1966-10-04 Carrell S Mcnulty Apparatus for controlling liquid flow
US4013097A (en) * 1974-06-28 1977-03-22 Anthony Louis Calandra Apparatus and method for damming a pipeline
US4122869A (en) * 1976-11-12 1978-10-31 Roberson Walter H Sr Closure plug assembly
US4160464A (en) * 1973-12-06 1979-07-10 United Kingdom Atomic Energy Authority Sealing members
US4203473A (en) * 1976-11-12 1980-05-20 Roberson Walter H Closure plug assembly
US4923464A (en) * 1985-09-03 1990-05-08 Becton, Dickinson And Company Percutaneously deliverable intravascular reconstruction prosthesis
US5240031A (en) * 1992-11-09 1993-08-31 Vigil David J Inflatable bladder valve for irrigation pipe
US5327924A (en) * 1990-09-12 1994-07-12 British Gas Plc Abandonment of a branch main
US6321793B1 (en) * 2000-06-12 2001-11-27 L&L Products Bladder system for reinforcing a portion of a longitudinal structure
US6419305B1 (en) 2000-09-29 2002-07-16 L&L Products, Inc. Automotive pillar reinforcement system
US6422575B1 (en) 2000-03-14 2002-07-23 L&L Products, Inc. Expandable pre-formed plug
US6467834B1 (en) 2000-02-11 2002-10-22 L&L Products Structural reinforcement system for automotive vehicles
US6471285B1 (en) 2000-09-29 2002-10-29 L&L Products, Inc. Hydroform structural reinforcement system
US6474723B2 (en) 2000-03-14 2002-11-05 L&L Products, Inc. Heat activated reinforcing sleeve
US6474722B2 (en) 2000-03-14 2002-11-05 L&L Products Structural reinforcement member for wheel well
US6502821B2 (en) 2001-05-16 2003-01-07 L&L Products, Inc. Automotive body panel damping system
US20030201572A1 (en) * 2002-04-26 2003-10-30 L&L Products, Inc. Insertable barrier and chamber system for reinforcement of structural members
US6668457B1 (en) 1999-12-10 2003-12-30 L&L Products, Inc. Heat-activated structural foam reinforced hydroform
US6729425B2 (en) 2001-09-05 2004-05-04 L&L Products, Inc. Adjustable reinforced structural assembly and method of use therefor
US20040135058A1 (en) * 2002-12-13 2004-07-15 Joseph Wycech Method and apparatus for inserting a structural reinforcing member within a portion of an article of manufacture
US6820923B1 (en) 2000-08-03 2004-11-23 L&L Products Sound absorption system for automotive vehicles
US20050081383A1 (en) * 2003-09-18 2005-04-21 L&L Products, Inc. System and method employing a porous container for sealing, baffling or reinforcing
US6921130B2 (en) 2000-02-11 2005-07-26 L&L Products, Inc. Structural reinforcement system for automotive vehicles
US20050217785A1 (en) * 2004-03-31 2005-10-06 L&L Products, Inc. Method of applying activatable material to a member
US20050229985A1 (en) * 2002-05-21 2005-10-20 Keld Saxenfelt Inflatable, flexible device for use as an expandable closure device, and a method of producing said device
US20060065483A1 (en) * 2004-09-29 2006-03-30 L&L Products, Inc. Baffle with flow-through medium
US7077460B2 (en) 2002-04-30 2006-07-18 L&L Products, Inc. Reinforcement system utilizing a hollow carrier
WO2010051817A3 (en) * 2008-11-06 2011-01-20 Lm Glasfiber A/S Method for a transverse filling inside an elongated narrow cavity
KR101203687B1 (en) * 2010-11-09 2012-11-21 전남도시가스(주) Apparatus for shutting off the gas and the method of shut off the gas using that
US20190338858A1 (en) * 2018-05-01 2019-11-07 Operations Technology Development, Nfp High pressure detachable/retractable stopper plug
SE2050684A1 (en) * 2020-06-10 2021-12-11 Noaq Flood Prot Ab Pipe plug arrangement and method for activating such pipe plug arrangement

Cited By (61)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2930396A (en) * 1956-08-20 1960-03-29 S D M Entpr Inc Flood control means
US2976191A (en) * 1958-01-09 1961-03-21 James C Weston Method of killing roots adjacent sewer line joints
US3276481A (en) * 1964-08-13 1966-10-04 Carrell S Mcnulty Apparatus for controlling liquid flow
US4160464A (en) * 1973-12-06 1979-07-10 United Kingdom Atomic Energy Authority Sealing members
US4013097A (en) * 1974-06-28 1977-03-22 Anthony Louis Calandra Apparatus and method for damming a pipeline
US4122869A (en) * 1976-11-12 1978-10-31 Roberson Walter H Sr Closure plug assembly
US4203473A (en) * 1976-11-12 1980-05-20 Roberson Walter H Closure plug assembly
US4923464A (en) * 1985-09-03 1990-05-08 Becton, Dickinson And Company Percutaneously deliverable intravascular reconstruction prosthesis
US5327924A (en) * 1990-09-12 1994-07-12 British Gas Plc Abandonment of a branch main
US5240031A (en) * 1992-11-09 1993-08-31 Vigil David J Inflatable bladder valve for irrigation pipe
US7194804B2 (en) 1999-12-10 2007-03-27 L & L Products, Inc. Method of forming a hydroform
US6668457B1 (en) 1999-12-10 2003-12-30 L&L Products, Inc. Heat-activated structural foam reinforced hydroform
US20050218697A1 (en) * 2000-02-11 2005-10-06 L&L Products, Inc. Structural reinforcement system for automotive vehicles
US6619727B1 (en) 2000-02-11 2003-09-16 L&L Products, Inc. Structural reinforcement system for automotive vehicles
US6467834B1 (en) 2000-02-11 2002-10-22 L&L Products Structural reinforcement system for automotive vehicles
US7160491B2 (en) 2000-02-11 2007-01-09 L&L Products, Inc. Structural reinforcement system for automotive vehicles
US6921130B2 (en) 2000-02-11 2005-07-26 L&L Products, Inc. Structural reinforcement system for automotive vehicles
US6938947B2 (en) 2000-02-11 2005-09-06 L & L Products, Inc. Structural reinforcement system for automotive vehicles
US20070075569A1 (en) * 2000-02-11 2007-04-05 L&L Products, Inc. Structural reinforcement system for automotive vehicles
US6474722B2 (en) 2000-03-14 2002-11-05 L&L Products Structural reinforcement member for wheel well
US6422575B1 (en) 2000-03-14 2002-07-23 L&L Products, Inc. Expandable pre-formed plug
US6607238B2 (en) 2000-03-14 2003-08-19 L&L Products, Inc. Structural reinforcement member for wheel well
US6928736B2 (en) 2000-03-14 2005-08-16 L & L Products Method of reinforcing an automobile structure
US7011315B2 (en) 2000-03-14 2006-03-14 L&L Products, Inc. Expandable pre-formed plug
US6641208B2 (en) 2000-03-14 2003-11-04 L&L Products, Inc. Heat activated reinforcing sleeve
US6474723B2 (en) 2000-03-14 2002-11-05 L&L Products, Inc. Heat activated reinforcing sleeve
US6482486B1 (en) 2000-03-14 2002-11-19 L&L Products Heat activated reinforcing sleeve
USRE44796E1 (en) * 2000-06-12 2014-03-11 Zephyros, Inc. Bladder system for reinforcing a portion of a longitudinal structure
US6321793B1 (en) * 2000-06-12 2001-11-27 L&L Products Bladder system for reinforcing a portion of a longitudinal structure
US6820923B1 (en) 2000-08-03 2004-11-23 L&L Products Sound absorption system for automotive vehicles
US6471285B1 (en) 2000-09-29 2002-10-29 L&L Products, Inc. Hydroform structural reinforcement system
US6575526B2 (en) 2000-09-29 2003-06-10 L&L Products, Inc. Hydroform structural reinforcement system
US6419305B1 (en) 2000-09-29 2002-07-16 L&L Products, Inc. Automotive pillar reinforcement system
US6523884B2 (en) 2000-09-29 2003-02-25 L&L Products, Inc. Hydroform structural reinforcement system
US6502821B2 (en) 2001-05-16 2003-01-07 L&L Products, Inc. Automotive body panel damping system
US20040159481A1 (en) * 2001-09-05 2004-08-19 L&L Products, Inc. Adjustable reinforced structural assembly and method of use therefor
US6729425B2 (en) 2001-09-05 2004-05-04 L&L Products, Inc. Adjustable reinforced structural assembly and method of use therefor
US6880657B2 (en) 2001-09-05 2005-04-19 L&L Products Inc. Adjustable reinforced structural assembly and method of use therefor
US20030201572A1 (en) * 2002-04-26 2003-10-30 L&L Products, Inc. Insertable barrier and chamber system for reinforcement of structural members
US7169344B2 (en) 2002-04-26 2007-01-30 L&L Products, Inc. Method of reinforcing at least a portion of a structure
US20030209921A1 (en) * 2002-04-26 2003-11-13 L&L Products, Inc Insertable barrier and chamber system for reinforcement of structural members
US8128780B2 (en) 2002-04-30 2012-03-06 Zephyros, Inc. Reinforcement system utilizing a hollow carrier
US7296847B2 (en) 2002-04-30 2007-11-20 Zephyros, Inc. Reinforcement system utilizing a hollow carrier
US7077460B2 (en) 2002-04-30 2006-07-18 L&L Products, Inc. Reinforcement system utilizing a hollow carrier
US20050229985A1 (en) * 2002-05-21 2005-10-20 Keld Saxenfelt Inflatable, flexible device for use as an expandable closure device, and a method of producing said device
US20040135058A1 (en) * 2002-12-13 2004-07-15 Joseph Wycech Method and apparatus for inserting a structural reinforcing member within a portion of an article of manufacture
US7290828B2 (en) 2003-09-18 2007-11-06 Zephyros, Inc. Baffle system
US20050081383A1 (en) * 2003-09-18 2005-04-21 L&L Products, Inc. System and method employing a porous container for sealing, baffling or reinforcing
US20050194706A1 (en) * 2003-09-18 2005-09-08 L&L Products, Inc. System and method employing a porous container for sealing, baffling or reinforcing
US7469459B2 (en) 2003-09-18 2008-12-30 Zephyros, Inc. System and method employing a porous container for sealing, baffling or reinforcing
US7180027B2 (en) 2004-03-31 2007-02-20 L & L Products, Inc. Method of applying activatable material to a member
US20050217785A1 (en) * 2004-03-31 2005-10-06 L&L Products, Inc. Method of applying activatable material to a member
US20060065483A1 (en) * 2004-09-29 2006-03-30 L&L Products, Inc. Baffle with flow-through medium
WO2010051817A3 (en) * 2008-11-06 2011-01-20 Lm Glasfiber A/S Method for a transverse filling inside an elongated narrow cavity
US20110225796A1 (en) * 2008-11-06 2011-09-22 Lm Glasfiber A/S Providing a transverse filling inside and elongated narrow cavity
KR101203687B1 (en) * 2010-11-09 2012-11-21 전남도시가스(주) Apparatus for shutting off the gas and the method of shut off the gas using that
US20190338858A1 (en) * 2018-05-01 2019-11-07 Operations Technology Development, Nfp High pressure detachable/retractable stopper plug
US10914389B2 (en) * 2018-05-01 2021-02-09 Operations Technology Development, Nfp High pressure detachable/retractable stopper plug
SE2050684A1 (en) * 2020-06-10 2021-12-11 Noaq Flood Prot Ab Pipe plug arrangement and method for activating such pipe plug arrangement
WO2021251881A1 (en) * 2020-06-10 2021-12-16 Noaq Flood Protection Ab Pipe plug arrangement and method for activating such pipe plug arrangement
SE544162C2 (en) * 2020-06-10 2022-02-15 Noaq Flood Prot Ab Pipe plug arrangement and method for activating such pipe plug arrangement

Similar Documents

Publication Publication Date Title
US1814677A (en) Stopper for pipe lines
US1506418A (en) Test plug
US4658861A (en) Test plug assembly
US4203473A (en) Closure plug assembly
US329773A (en) perry
US4122869A (en) Closure plug assembly
US5746243A (en) Valved inflation adapter
US1724063A (en) Combined inflating and deflating valve
US2652168A (en) Temporary outlet box mounting for use with concrete forms
US2206410A (en) Core for forming concrete conduits
US4153096A (en) Apparatus for introducing pressurized gas into a tire
US2158576A (en) Extension tube for inflating automobile tires
US2257498A (en) Tire inflation apparatus
US2592759A (en) Adapter for use when filling the tubes of vehicle tires with liquid
US2857933A (en) Conduit plugging device
US1795848A (en) Pneumatic y-branch test plug
US2738675A (en) Gauge for liquid storage tanks
US2778374A (en) Valve for supersized tires
US2488456A (en) Air valve
US1710128A (en) Tire inflating and deflating valve
US2100627A (en) Tire vulcanizing core
US1405706A (en) Air gauge
US1489164A (en) Air-pressure gauge
US1582928A (en) Air-releasing device
US1889621A (en) Gas main stopper