|Publication number||US3503804 A|
|Publication date||31 Mar 1970|
|Filing date||25 Apr 1967|
|Priority date||25 Apr 1967|
|Publication number||US 3503804 A, US 3503804A, US-A-3503804, US3503804 A, US3503804A|
|Original Assignee||Schneider Hellmut|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (2), Referenced by (75), Classifications (22)|
|External Links: USPTO, USPTO Assignment, Espacenet|
March 1970 H. SCHNEIDER ,503,8fi4
METHOD AND APPARATUS FOR THE PRODUCTION OF SONIC 0R ULTRASONIC WAVES ON A SURFACE Filed April 25, 1967 5, LASER BEAM I0 SENS/N6 DEV/CE United States Patent (i METHOD AND APPARATUS FOR THE PRODUC- TION OF SONIC R ULTRASONIC WAVES ON A SURFACE Hellnrut Schneider, Jacob-Steffan-Strasse l4, Mainz (Rhine), Germany Filed Apr. 25, 1967, Ser. No. 633,498 Int. Cl. 1308b 7/04; 1305b 17/04 U.S. Cl. 134-1 Claims ABSTRACT OF THE DISCLOSURE A method and device for producing energy on a surface together with a jet of water for example to clean the surface. there being provided a nozzle for generating a liquid jet and a device such as a laser generator for producing, a laser beam coaxially with the liquid jet, o that when the liquid jet and laser beam strike the surface to be cleaned, there is a combined action between the jet and the energy of the laser beam.
BRIEF SUMMARY THE INVENTION i the full development of their effect, be used in hot suds and/or be agitated vigorously. The same is true of solvents of all kinds, if they are not able to transform the impurities into a true solution. The auxiliary means necessary to produce these effects are voluminous and expensive and yet fulfill their prtrpose only partially. Moreover, where the use of thermal energy, mechanical energy, and/ or kinetic energy can be used only insufficiently or not at all. for example on relatively large objects, such as buildings, automobiles, ships, streets and the like, cleaning becomes very expensive, and sometimes even imprac- I ticablc. Also for objects which due to their size and complex form have inaccessible surfaces, effective cleaning aids were heretofore unusable, and a simple liquid jet was used. The liquid jet, which is of particular importance, offers in itself an abundance of advantages, which, however, are so weakened in their sum of disadvantages, not overcome until now, that only in the rarest cases could a really satisfactory end result be achieved with a liquid jet.
it is known, for example, that in the cleaning of vehicles. a liquid jet directed onto the dirty areas with great pressure removes the coarsest impurities lull is unable to take away the liner particles on the surface. Direct con- ;act and rubbing with a brush, sponge and the like is necessary to eliminate this residue of dirt. liven when adding surface-active substances, a lacquered surface cannot be cleaned with the liquid jet alone so that it appears visually more or less clean, because the remaining fine dirt particles produce a dull, cloudy appearance on the surface. The addition of thermal energy improves matters but is uncconomical. especially because much of the thermal energy applied is lost outside of the actual sphere of action.
An attempt has been made to add to the liquid jet other forms of energy, as for instance a pulsing, the frequency of which can be ultrasonic. The latter would be most Hce effective if a good deal of the applied energy were not lost outside of the actual sphere of action on the surface to be cleaned. Known for example are devices with which ultrasonic sound i generated inside a vessel containing a liquid, and also known 'are devices which impart pulscs to a liquid jet up to the ultrasonic frequency range. in the case of the liquid container it is possible to set the entire contents thereof in vibration. With a liquid jet,'=however, the ultrasonic vibration is produced in the liquid before it leaves the outlet, that is. not in the free jctitself. Although the pulses do propagate within the free jet, only a fraction of the original energy still exists, at the point of impingement of the jet on the surface to be cleaned.
ln controdistinction. an object of the inuution is" to provide a method and device by means of which energy pulses, in particular sonic or ultrasonic pulses, or heat,
can be produced within a free liquid jet as close as possible to the region of the desired zone of operation, that is, at the point of impingement on the surface tobe cleaned;
This objective is achieved with the method according to the invention in that in a free liquid jet directed onto a region of a surface at which energy pulses are to be produced, before or in the outlet of the apparatus producing the jet, a beam. substantially coaxial with the liquid jet, of parallel or convergingencrgy rays is focused onto said region. The rays are transformed into sonic; or ultrasonic waves or into heat near or at the point of'impingement of the liquid jet on the sr rrfacc.
When using parallel radiation (in thc rang".- bctuccn infrared and ultraviolet) the energy inherent in the radiation is liberated only at the point of impingement of the liquid jet on the surface to be cleaned, in the fcrnr of heat or ultrasonic waves. This presupposes that the liquid does not offer any appreciable resistance to the radiation energy at least in the region of-the jct length (cl-car liquidl. The radiation energy can be emitted intermittently, that is, in pulses, so that an additional desired pulsing effect is obtained at the point of impingement of the liquid jet. Likewise, radiation high in energy can= be concentrated by an optical system at any point of the free jet. so that intensified high energy is liberated thcrcat in the case of the impingement of the radiation. The radiation can impinge either on the surface to be cleaned itself, or on particles which=are added to the liquid, with the object of converting the radiation into heat or mechanical energy in the region of the focal point zone, of the energy radiatiomAlso optical systems may be used which produce several focal zones or focal points more or less'removed from each other within the free liquid'jet.
Laser radiation may be used in particularly advimtageous manner as energy rays. With a device for the production of laser rays, one can produce an almost absolutely parallel cncrgy radiation. in particular coherent li ht. without major energy losses occurring within the radiation producing device and on the path of the radiotio'n outside the producing device for inipingi-mcnt on surfaces. The radiation emitted by a laser dcvicc passes through transparent media practically without his the case of a straight transparent liquid jet. the radi propagating in it in the direction of its longitudinal axis is fully maintained up to the point of ir-npingemcnt of the liquid jet. it is even found that with a slight. curvature of the liquid jet. the energy radiation propagating rectilinearly is reflected at its outer faces and thus accompanies the liquid jet at least in part fully in its curvature. Due to its coherence, the laser radiation can be concentrated exactly at predetermined regions by corresponding optical systems. i
The energy inherent in the parallel rays of the laser beam is sullicient to produce ultrasonic waves in a liquid medium, with formation of the desired cavitation, where in quick succession small vacuum spaces or respectively vapor bubbles are fortued. If this occurs in the immediate vicinity of or in local coincidence with the dirt particles to be removed, these are detached from the surface and carried away in the liquid. The forces of adhesion which cause the finest dirt particles to adhere to a surface are sufficient to withstand the forces produced by a surfaceactive substance, so that the surface-active substance is unable to penetrate between the surface and the particle. This is not the case when waves of ultrasonic frequencies are added or used alone, whereby all particles are set in resonance and thus move in relation to the surface. Surface-active substances can then fully surround the particles. liven without the joint action of the surface-active substances, the particles are removed.
Hazards due to unintentional directing of the laser ray onto living organisms or overshooting are very largely avoided in that by reflection of. the radiation at the inner wall of the liquid jet due to so-called total reflection at some distance from the outlet opening of the water jet, and upon the division thereof, the laser radiation is transformed into diffiused light. An arrangement can easily be constructed where the laser radiation is developed only in the presence of the liquid jet.
The danger of damage to a surface due to direct impingement of a laser ray thereon is largely eliminated on the one hand, by the fact that the laser ray is unable to penetrate into the material, and on the other hand, by the ample cooling afforded by the presence of the liquid.
The method of the invention can serve also to impart ultrasonic energy to movable or other bodies to which ultrasonic energy cannot be ordinarily imparted or can be imparted only under unfavorable conditions. Thus a higher cutting speed or machining on lathes can be attained by ultrasonic sound, which may be produced with the device described directly at the cutting or machining region. The laser ray-conducting and ultrasonic producing liquid jct can be utilized in a great number of fields. as it can be used in convenient manner at any desired point and is readily movable.
BRIEF DESCRIPTION OF THE DRAWING DETAILED DESCRIPTION OI 'I'I-IE INVENTION Referring to the drawings there is sIIUWlI diagrammatically in FIG. I an arrangement wherein a nozzle 1 is fed with liquid from a pipe I to generate a liqrrid jet 2. The
riqnid jet is directed towards a surface 3 which may forexample be a surface which is to be cleaned.
A laser generator 4 is positioned adjacent the nozzle to generate a beam 5 of coherent light which is directed substantially coaxial with the liquid jet 2 and which contacts the surface 3 within the confines of the liquid jet 2. The liquid jet is formed of clear liquid so as not to constitutc any resistance to the radiation energy of the beam 5. The laser beam releases energy in the region of impingement with surface 3 in the form of ultrasonic waves. The combined effect of the ultra onic wa ,W'ncration and the liquid jet 2 on the surface 3 is LIIL'K. tr: tr is move all dirt particles froru the sur face 3 and thereby leave the same cleaned. It is also possible to utilize the beam 5 so that heat is generated in the region where the jet impinges on the surface 3 and the combined eflect of tue jet with the heat generation can also be employed to clean surface 3. Y
.-\n optical device 6 may be fitted on the laser gcnctafor 4 for the purpose of optically focusing the beam of rays 5 on the surface 3.
In the modified arrangement shown in-FIG. 2, an optical device 7 is fitted to the laser generator for the purpose of generating a plurality of individual spared beams 5a, 5/). i
The liquid jet 2 may be composed of ordinaryrwater or it may contain water with surface active agents which aid-in the removal of the dirt particles from th surface 3.
'The laser generator 4 develops hc'at during its operation and .for cooling purposes the pipe I may be formed with a coil C which surrounds the laser generator for cooling the same with water flowing therein.
In FIG. 4 there is shown a supply means 8 for the additionof particles to the liquid which is being fed to nozzle 1. The particles serve to transform the radiation energy from the beam 5, striking them into vibration energy thereby aiding in the removal of dirt particles from the surface 3. A valve 9 serves to control the quantity of particles introduced into the liquid fed to the nozzle, thereby controlling the magnitude of the vibration energy on the surface 3. Similarly, control of the frequency of the generation of pulses of the laser beam 5 serves to regulate the magnitude of the vibration energy at the surface 3.
In order to prevent the danager of damage to surface '3 due to direct impingement thereon of the laser beam 5 without the water jet, there is provided a device It) which is coupled to the laser generator 4 for controlling the operation thereof, in accordance with the flow of liquid from pipe P. In particular, the water sensing device 10 serves. to permit operation of the laser generator 4 only when liquid is present in the pipe I and is flowing from the nozzle 1 Although the invention has been described hercinabove in conjunction with several illustrated embodiments; it is apparent that numerous modifications and variations of these embodiments will bricorne evident to those skilled in the art without departing from the scope and s irit of the invention if defined by the attached t'lziittt;.
What is claimed is:
.l. Apparatus for generating energy at a surface comprising means for producing a liquid jct 'aud for direct ing said jet against a surface. means for ruojccting a beam of rays having radiation energy within the jet to- \vardssaid surface. the radiation energy of said I-t.ltll of rays being converted in the region where the lfqtli(l.j0l strikes the surface into sonic or ultrasonic Waves or heat, and an optical system disposed in the path of said bcani for focusing the beam within the liquid jet. l
2. Apparatus as claimed in claim 1, wherein said optical system includes means for producing a plurality of individual beams of high energy concentration.
3. Apparatus as claimed in claim 1 comprising means coupling the two first said means such that the means which projectsthe heam of rays is operative only when References Cited the liquid jet is produced. I v UNTED y 4. A method of generating energy at a surface, said a w q I H v method comprising directing a free liquid jet against a surface, and projecting. substantially coaxially within the 5 3,373,752 3/1) out: jet, a beam of laser rays having radiation energy which 4 1 is added to that of the liquid jet. said radiation energy MORRLS WOUX' Lxmmm being converted. in the region where the liquid jet strikes D. G. MILLMAN, Assistant Examiner the surface into sonic or ultrasonic waves or heat.
5. A method as claimed in claim 4 comprising opti- 10 U.S Cl. Cally focusing the beam of rays on the surface. 134 l98, 201; 239 4 m2;
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US2980123 *||14 Nov 1955||18 Apr 1961||Jerome H Lemelson||Ultrasonic apparatus|
|US3373752 *||12 Nov 1963||19 Mar 1968||Inoue Kiyoshi||Method for the ultrasonic cleaning of surfaces|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3847780 *||24 Jul 1972||12 Nov 1974||Rathenower Optische Werke Veb||Device for thinning technical and microscopic specimens under laminar flow conditions|
|US4137778 *||4 Oct 1977||6 Feb 1979||Krautkramer-Branson, Incorporated||Method and apparatus for producing ultrasonic waves in light absorbing surfaces of workpieces|
|US4295502 *||23 Oct 1979||20 Oct 1981||Jagenberg Werke Ag||Method and apparatus for the elimination of foam above the level of a liquid, and particularly above a packaged liquid such as milk|
|US4330699 *||27 Jul 1979||18 May 1982||The United States Of America As Represented By The Secretary Of The Navy||Laser/ultrasonic welding technique|
|US4337896 *||17 Dec 1980||6 Jul 1982||Sono-Tek Corporation||Ultrasonic fuel atomizer|
|US4368080 *||27 Oct 1980||11 Jan 1983||Robert Langen||Method of removing rust from metallic objects|
|US4494357 *||25 Aug 1983||22 Jan 1985||International Paper Company||Sterilization of packaging material|
|US4756765 *||12 Dec 1983||12 Jul 1988||Avco Research Laboratory, Inc.||Laser removal of poor thermally-conductive materials|
|US4963268 *||21 Feb 1989||16 Oct 1990||Aqua Dynamics Group Corp.||Method and system for variable frequency electromagnetic water treatment|
|US5024968 *||8 Jul 1988||18 Jun 1991||Engelsberg Audrey C||Removal of surface contaminants by irradiation from a high-energy source|
|US5099557 *||9 Nov 1990||31 Mar 1992||Engelsberg Audrey C||Removal of surface contaminants by irradiation from a high-energy source|
|US5113582 *||13 Nov 1990||19 May 1992||General Electric Company||Method for making a gas turbine engine component|
|US5120395 *||13 Nov 1990||9 Jun 1992||General Electric Company||Method for making a gas turbine engine component with a textured surface|
|US5210944 *||27 Nov 1991||18 May 1993||General Electric Company||Method for making a gas turbine engine component|
|US5216808 *||13 Dec 1991||8 Jun 1993||General Electric Company||Method for making or repairing a gas turbine engine component|
|US5419971 *||3 Mar 1993||30 May 1995||General Electric Company||Enhanced thermal barrier coating system|
|US5531857 *||15 Sep 1994||2 Jul 1996||Cauldron Limited Partnership||Removal of surface contaminants by irradiation from a high energy source|
|US5637245 *||13 Apr 1995||10 Jun 1997||Vernay Laboratories, Inc.||Method and apparatus for minimizing degradation of equipment in a laser cleaning technique|
|US5669979 *||16 Aug 1996||23 Sep 1997||Uvtech Systems, Inc.||Photoreactive surface processing|
|US5773791 *||3 Sep 1996||30 Jun 1998||Kuykendal; Robert||Water laser machine tool|
|US5814156 *||12 Nov 1996||29 Sep 1998||Uvtech Systems Inc.||Photoreactive surface cleaning|
|US5821175 *||9 Nov 1994||13 Oct 1998||Cauldron Limited Partnership||Removal of surface contaminants by irradiation using various methods to achieve desired inert gas flow over treated surface|
|US5902499 *||22 May 1995||11 May 1999||Richerzhagen; Bernold||Method and apparatus for machining material with a liquid-guided laser beam|
|US6503574||22 Dec 1994||7 Jan 2003||General Electric Co.||Method for producing an enhanced thermal barrier coating system|
|US6607524||24 Feb 2000||19 Aug 2003||Pharos Optics, Inc.||Surgical laser and method of ablating hard biological materials|
|US6777642 *||9 Jan 2003||17 Aug 2004||Data Storage Institute||Method and apparatus for cleaning surfaces|
|US7629556 *||18 Sep 2006||8 Dec 2009||Sematech, Inc.||Laser nozzle methods and apparatus for surface cleaning|
|US8088289 *||27 Jul 2003||3 Jan 2012||Atlantium Technologies Ltd.||Method and device for affecting a chemical or mechanical property of a target site|
|US8424617||19 Aug 2009||23 Apr 2013||Foro Energy Inc.||Methods and apparatus for delivering high power laser energy to a surface|
|US8511401||19 Aug 2009||20 Aug 2013||Foro Energy, Inc.||Method and apparatus for delivering high power laser energy over long distances|
|US8571368||21 Jul 2010||29 Oct 2013||Foro Energy, Inc.||Optical fiber configurations for transmission of laser energy over great distances|
|US8627901||1 Oct 2010||14 Jan 2014||Foro Energy, Inc.||Laser bottom hole assembly|
|US8636085||19 Aug 2009||28 Jan 2014||Foro Energy, Inc.||Methods and apparatus for removal and control of material in laser drilling of a borehole|
|US8662160||16 Aug 2011||4 Mar 2014||Foro Energy Inc.||Systems and conveyance structures for high power long distance laser transmission|
|US8701794||13 Mar 2013||22 Apr 2014||Foro Energy, Inc.||High power laser perforating tools and systems|
|US8757292||13 Mar 2013||24 Jun 2014||Foro Energy, Inc.||Methods for enhancing the efficiency of creating a borehole using high power laser systems|
|US8820434||19 Aug 2009||2 Sep 2014||Foro Energy, Inc.||Apparatus for advancing a wellbore using high power laser energy|
|US8826973||19 Aug 2009||9 Sep 2014||Foro Energy, Inc.||Method and system for advancement of a borehole using a high power laser|
|US8869914||13 Mar 2013||28 Oct 2014||Foro Energy, Inc.||High power laser workover and completion tools and systems|
|US8879876||18 Oct 2013||4 Nov 2014||Foro Energy, Inc.||Optical fiber configurations for transmission of laser energy over great distances|
|US8936108||13 Mar 2013||20 Jan 2015||Foro Energy, Inc.||High power laser downhole cutting tools and systems|
|US8997894||26 Feb 2013||7 Apr 2015||Foro Energy, Inc.||Method and apparatus for delivering high power laser energy over long distances|
|US9027668||23 Feb 2012||12 May 2015||Foro Energy, Inc.||Control system for high power laser drilling workover and completion unit|
|US9074422||23 Feb 2012||7 Jul 2015||Foro Energy, Inc.||Electric motor for laser-mechanical drilling|
|US9080425||10 Jan 2012||14 Jul 2015||Foro Energy, Inc.||High power laser photo-conversion assemblies, apparatuses and methods of use|
|US9089928||2 Aug 2012||28 Jul 2015||Foro Energy, Inc.||Laser systems and methods for the removal of structures|
|US9138786||6 Feb 2012||22 Sep 2015||Foro Energy, Inc.||High power laser pipeline tool and methods of use|
|US9242309||15 Feb 2013||26 Jan 2016||Foro Energy Inc.||Total internal reflection laser tools and methods|
|US9244235||1 Mar 2013||26 Jan 2016||Foro Energy, Inc.||Systems and assemblies for transferring high power laser energy through a rotating junction|
|US9267330||23 Feb 2012||23 Feb 2016||Foro Energy, Inc.||Long distance high power optical laser fiber break detection and continuity monitoring systems and methods|
|US9284783||28 Mar 2013||15 Mar 2016||Foro Energy, Inc.||High power laser energy distribution patterns, apparatus and methods for creating wells|
|US9327810||2 Jul 2015||3 May 2016||Foro Energy, Inc.||High power laser ROV systems and methods for treating subsea structures|
|US9347271||16 Feb 2010||24 May 2016||Foro Energy, Inc.||Optical fiber cable for transmission of high power laser energy over great distances|
|US9360631||23 Feb 2012||7 Jun 2016||Foro Energy, Inc.||Optics assembly for high power laser tools|
|US9360643||1 Jun 2012||7 Jun 2016||Foro Energy, Inc.||Rugged passively cooled high power laser fiber optic connectors and methods of use|
|US20040020905 *||9 Jan 2003||5 Feb 2004||Wendong Song||Method and apparatus for cleaning surfaces|
|US20040206731 *||13 May 2004||21 Oct 2004||Data Storage Institute, A Singapore Corporation||Method and apparatus for cleaning surfaces|
|US20060104859 *||27 Jul 2003||18 May 2006||Zamir Tribelsky||Method and device for affecting a chemical or mechanical property of a target site|
|US20070163715 *||18 Sep 2006||19 Jul 2007||Sematech, Inc.||Laser Nozzle Methods And Apparatus For Surface Cleaning|
|US20070278195 *||1 Nov 2005||6 Dec 2007||Synova Sa||Method and Device for Generating a Jet of Fluid for Material Processing and Fluid Nozzle for Use in Said Device|
|US20100044103 *||19 Aug 2009||25 Feb 2010||Moxley Joel F||Method and system for advancement of a borehole using a high power laser|
|US20100044104 *||19 Aug 2009||25 Feb 2010||Zediker Mark S||Apparatus for Advancing a Wellbore Using High Power Laser Energy|
|US20100044105 *||19 Aug 2009||25 Feb 2010||Faircloth Brian O||Methods and apparatus for delivering high power laser energy to a surface|
|US20100181238 *||14 Jan 2010||22 Jul 2010||Cummins Filtration Ip Inc.||Filtration device for fluid circulating in an engine or a piece of hydraulic equipment, comprised of a means for heating the fluid adjoining the filtration means|
|US20100224602 *||6 Mar 2009||9 Sep 2010||General Electric Company||Method and system for removing thermal barrier coating|
|US20120074110 *||31 Aug 2011||29 Mar 2012||Zediker Mark S||Fluid laser jets, cutting heads, tools and methods of use|
|US20120298649 *||21 May 2012||29 Nov 2012||Sugino Machine Limited||Laser machining apparatus|
|USRE33777 *||27 Jun 1990||24 Dec 1991||Avco Corporation||Laser removal of poor thermally-conductive materials|
|CN102059453A *||10 Jan 2011||18 May 2011||哈尔滨工业大学||Non-contact-type ultrasonic-assisted laser welding method|
|DE3309021A1 *||14 Mar 1983||20 Sep 1984||Hana Dr Krizek||Process and apparatus for treating water|
|DE3504533A1 *||11 Feb 1985||14 Aug 1986||Hoelter Heinz||Method of treating surfaces infested by bacteria and/or fungi, etc.|
|EP1283085A1 *||20 Nov 1998||12 Feb 2003||Pac Tech - Pacaging Technologies GmbH||Method and apparatus for thermal assembling of connecting areas of two substrates|
|EP3000537A4 *||8 May 2014||19 Oct 2016||Omron Tateisi Electronics Co||Washing position confirmation device, fluid delivery position confirmation device, washing position confirmation system, and fluid delivery position confirmation method|
|WO1983001400A1 *||21 Oct 1982||28 Apr 1983||First Of Chelsea Corp||Laser removal of materials from surfaces|
|WO2007085452A1 *||25 Jan 2007||2 Aug 2007||Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.||Process and device for the precision-processing of substrates by means of a laser coupled into a liquid stream, and use of same|
|U.S. Classification||134/1, 239/4, 219/121.6, 219/121.84, 422/24, 134/201, 239/102.1, 219/121.62, 134/198, 219/121.85|
|International Classification||B23K26/14, G10K15/04, B05B7/16, B05B7/22|
|Cooperative Classification||G10K15/046, B23K26/1417, B05B7/228, B23K26/1411|
|European Classification||G10K15/04C, B05B7/22C, B23K26/14B, B23K26/14D|