In Particulate Or Comminuted Form Patents (Class 134/7)
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Patent number: 5443768Abstract: This invention relates to an abrasive composition comprising (a) a major amount of at least one abrasive powder, (b) at least one resin selected from the group consisting of a polymer of a diene, a rosin material, a coumarone-indene resin, and a mixture of two or more thereof, and (c) at least one copolymer of an olefin and an acrylate or a methacrylate. The abrasive composition may additionally include (d) a surface active agent. The abrasive composition may be added to a polymer or resin to form purge compositions. The invention also relates to methods of cleaning processing equipment and preparing the abrasive compositions and purge composition.Type: GrantFiled: December 21, 1993Date of Patent: August 22, 1995Assignee: The Ferro CorporationInventors: Anthony S. Scheibelhoffer, Dianna B. Dusek, Dennis L. Hammond, Surachai Wimolkiatisak, William R. Myers, Robert J. Opalko, Richard L. Abrams
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Patent number: 5441763Abstract: A method of corrosion protecting steel structural components, such as motor vehicle structural frames and engine cradles, the method comprising: a steel shot blast mechanical cleaning of the steel structural component to remove scale, rust, and other oxidation residues, then an aluminum oxide shot blast mechanical cleaning of the steel structural component to remove any residual ferrous material, to flatten any undesirable metal peaks, and to leave a thin layer of aluminum oxide on the component, then the application of a powder paint, and then baking the steel structural component.Type: GrantFiled: April 5, 1994Date of Patent: August 15, 1995Assignee: A.O. Smith CorporationInventor: Ming C. Kuo
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Patent number: 5439527Abstract: A method for blast cleaning metal and fixing the hazardous waste generated by blast cleaning. An abrasive cement in a sufficient amount is combined with the blast cleaning process, thereby reducing the leachability of the heavy metals and producing non-hazardous abrasive waste.Type: GrantFiled: November 4, 1993Date of Patent: August 8, 1995Assignee: The TDJ Group, Inc.Inventors: D. J. Rapp, Redmond R. Clark, Michael McGrew
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Patent number: 5431740Abstract: An apparatus for cleaning cylindrical surfaces includes a plurality of cleaning stations. Each cleaning station is designed to receive a substrate and includes a plurality of nozzles. The inlet end of each nozzle is connected to a source of liquid Carbon Dioxide, and the outlet end of each nozzle is connected to one end of a respective Carbon Dioxide expansion chamber. Liquid Carbon dioxide leaving each nozzle is converted to solid Carbon Dioxide in the corresponding expansion chamber. The other end of each Carbon Dioxide expansion chamber is coupled to a respective funnel which is, in turn, connected to a dispersing saddle. The dispersing saddles disperse the stream of solid Carbon Dioxide particles leaving each funnel and direct these particles to the substrate surface. The dispersing saddles are placed such that the entire circumference of the substrate surface is enveloped within the various streams of solid Carbon Dioxide particles.Type: GrantFiled: December 3, 1993Date of Patent: July 11, 1995Assignee: Xerox CorporationInventor: Eugene A. Swain
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Patent number: 5427623Abstract: A cleaning preparation for machines for processing plastics, consisting of or containing a powder-form acrylonitrile/butadiene/styrene polymer containing 20 to 80% by weight water which has been obtained from a latex by precipitation with magnesium sulfate or sodium phosphate and a process for cleaning processing machines for plastics in which the cleaning preparation is fed into the processing machine.Type: GrantFiled: June 18, 1993Date of Patent: June 27, 1995Assignee: Bayer AGInventors: Werner Schumann, Werner Tischer, Werner Brennig
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Patent number: 5423919Abstract: Described is a method and cleaning composition for cleaning tubes or other vessels, comprising a ceramic particulate spherical or conical in shape in an amount of 1-20 wt % of the total composition, and a liquid organic solvent in an amount of 80-99 wt % of the total composition, wherein the ceramic particulate is dispersed within the liquid solvent and wherein the solvent also has present in it N-methyl-2-pyrrolidone in an amount of 1-15 wt % of the total composition.Type: GrantFiled: December 10, 1993Date of Patent: June 13, 1995Assignee: Grow Group, Inc.Inventors: Jerry A. Dieter, Jeffery J. Firestone
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Patent number: 5424012Abstract: Methods and additives for purging thermoplastic extruders and associated apparatus are included which involve the addition of a purging additive to a follower thermoplastic resin which additive when heated causes the follower resin to froth as it passes through the unit, the passage of frothed resin thereby causing the removal of the contents of the unit, which contents includes resident resin along with resident additives, degraded materials and any other undesired materials which may be present in the unit.Type: GrantFiled: January 11, 1994Date of Patent: June 13, 1995Assignee: Cylatec Corp.Inventors: Raymond T. Ertle, Raymond J. Ertle
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Patent number: 5421898Abstract: This present invention provides an element for controlling release of a quaternary disinfectant in aqueous solutions comprising a substrate coated with the residue of an aqueous composition of a water soluble polymer and a quaternary ammonium disinfectant characterized in that the water soluble polymer has weight average molecular weight of 85,000 to 186,000 and a degree of hydrolysis of 87 to 89 percent.Type: GrantFiled: February 21, 1992Date of Patent: June 6, 1995Assignee: Reckitt & Colman Inc.Inventor: James W. Cavanagh
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Patent number: 5417608Abstract: This invention relates to a blast cleaning apparatus and method which includes a laterally moving conveyor with openings therethrough, and particularly a laterally moving wire mesh conveyor. The conveying surface is moved laterally such that there is lateral movement of the conveyor surface in the blast cleaning chamber. The lateral movement is relative to the workpiece and is substantially horizontal and substantially transverse to the direction of advancement of the conveyor. The conveying surface is moved relative to the workpiece so as to expose to upwardly directed cleaning material areas of the workpiece that would otherwise be protected from the cleaning material by material separating the openings in the conveying surface.Type: GrantFiled: August 18, 1994Date of Patent: May 23, 1995Assignee: Blast Cleaning Products Ltd.Inventor: Charles P. Elliott
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Patent number: 5415584Abstract: A particle blast cleaning apparatus for use with sublimable blast media, a source of compressed gas, and a discharge nozzle. The apparatus includes a mixing device for mixing the sublimable media with compressed gas, which mixing device includes a lower section having an outlet port formed therein and an upper section positioned over the lower section and having two sublimable media inlet ports and a compressed gas inlet port. A transfer member is mounted between the lower section and the upper section for reciprocal movement and has at least two transfer chambers for transporting sublimable media. A control mechanism is provided for controlling the flow of compressed gas to the compressed gas inlet port such that compressed gas is only provided to the compressed gas inlet port when at least one of the transfer chambers is in fluid communication with the compressed gas inlet port.Type: GrantFiled: September 21, 1993Date of Patent: May 16, 1995Assignee: TOMCO.sub.2 Equipment CompanyInventors: Robert K. Brooke, Robert W. Schmucker, Joseph J. Schmucker
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Patent number: 5411716Abstract: Disclosed is a dispenser (10) for use with an automatic floor scrubbing machine (75), and a method for cleaning a floor. The dispenser (10) has a solid chemical (13) which is dissolved by water spray from a spray nozzle (21). The detergent solution is then directed by a conduit (25) to a scrub brush (85). A water reservoir (83) provides water for the detergent solution, and a valve (38) directs water to a rinse conduit (37) for rinsing of the floor. After cleaning, the dirty water or detergent solution is carried through conduit (36) to a recovery tank (84).Type: GrantFiled: December 17, 1993Date of Patent: May 2, 1995Assignee: Ecolab Inc.Inventors: John E. Thomas, Daniel K. Boche, James D. Decker, James L. Copeland
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Patent number: 5407489Abstract: A method and apparatus for cleaning pickup and feed rolls of machines such as printers, copiers, facsimile machines and the like. The method utilizes a roll cleaner which includes an absorbent layer and cleaning solution provided within the absorbent layer. The roll cleaner is sufficiently thick to prevent the roll cleaner from feeding through the machine. The pickup and feed rolls will spin against the absorbent layer for cleaning. The roll cleaner may be stored in a resealable cellophane bag.Type: GrantFiled: October 4, 1993Date of Patent: April 18, 1995Assignee: QMS, Inc.Inventor: Stephen R. Hoover
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Patent number: 5404209Abstract: A method for forming images including the steps of: developing an electrostatic latent image formed on a latent image carrying member with a liquid developer including a carrier liquid; and bringing a toner image thus formed into contact with an oil absorbent selected from the group consisting of a network-forming oil-absorbent material and a gel-swelling oil-absorbent material, to remove the carrier liquid.Type: GrantFiled: January 6, 1994Date of Patent: April 4, 1995Assignee: Fuji Xerox Co., Ltd.Inventors: Hirotaka Matsuoka, Takako Kobayashi, Ken Hashimoto
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Patent number: 5400603Abstract: A heat exchanger includes a housing, a reservoir comprising a solid material mounted within the housing, temperature control means for controlling the temperature of the reservoir, and energy exchange means for allowing thermal contact between the reservoir and a substance for effectuating transfer of energy from the reservoir to the substance for regulating the temperature of the substance.Type: GrantFiled: June 14, 1993Date of Patent: March 28, 1995Assignee: International Business Machines CorporationInventors: Tibor L. Bauer, William A. Cavaliere, Charles R. Dart, II, Timothy H. Freebern, David C. Linnell, James M. Miller, Jin J. Wu
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Patent number: 5397498Abstract: A method for cleaning the interior of a molding machine having a residual thermoplastic resin after molding comprises the step of cleaning the interior of a molding machine with a cleaning composition which comprises:(A) 100 parts by weight of a thermoplastic resin;(B) 2 to 100 parts by weight of a polyalkylene oxide glycol having a viscosity-average molecular weight ranging from 10,000 to 1,500,000; and(C) 0.5 to 5 parts by weight, per 100 parts by weight of the sum of the foregoing components (A) and (B), of an alkylsulfate represented by the following general formula (I):R.sub.1 --O--SO.sub.3 M (I)wherein R.sub.1 represents an alkyl group having 8 to 20 carbon atoms and M represents an ion selected from the group consisting of K, Na and NH.sub.4 or a fatty acid salt represented by the following general formula (II):R.sub.2 COOX (II)wherein R.sub.2 represents an alkyl group having 7 to 23 carbon atoms and X represents an ion selected from the group consisting of K, Na, Ca, Mg and Zn.Type: GrantFiled: March 2, 1994Date of Patent: March 14, 1995Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Yuzuru Ishida, Masahiro Mitsuboshi, Ichirou Otsuka, Haruo Inoue
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Patent number: 5395454Abstract: Method and apparatus for cleaning elongated objects of surface contaminants. The elongated objects are exposed to a liquid or solid inert gas at suitable quantities to embrittle the contaminants. The elongated objects are then drawn through a die orifice causing the embrittled surface contaminants to be removed from the elongated objects.Type: GrantFiled: December 9, 1993Date of Patent: March 7, 1995Assignee: Liquid Air CorporationInventor: Marc J. Robert
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Patent number: 5383973Abstract: A method for removal of undesirable foreign matter from the interior of existing duct systems. The method comprises the insertion of a plurality of members into a stream of air within the existing duct to loosen the dirt adhering to the duct walls. The members are capable of receiving and holding a static electric charge on their exterior surfaces so that when the members are agitated within the stream of air and against the duct, a static electrical charge is placed thereon. The electrical charge causes a portion of the foreign matter to be attracted to and adhere to the members. The stream of air with the members and loose foreign matter entrained therein is then removed from the duct.Type: GrantFiled: October 21, 1993Date of Patent: January 24, 1995Assignee: ADCS/Air Duct Cleaning Systems, Inc.Inventor: Ward E. Curry, Jr.
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Patent number: 5380347Abstract: A blast media for stripping contaminants from a solid surface comprises abrasive particles and a surfactant in the form of a granular surfactant-clathrate compound formed of a surfactant and a water soluble compound having clathration capability such as urea. The surfactant reduces the amount of water soluble residues which remain on the targeted surface and enhances the removal of dirt, grease and oil from the targeted surface.Type: GrantFiled: February 3, 1994Date of Patent: January 10, 1995Assignee: Church & Dwight Co., Inc.Inventors: Anthony E. Winston, Benny S. Yam, Keith A. Jones
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Patent number: 5378312Abstract: A method of fabricating a semiconductor structure includes the steps of providing a semiconductor substrate having a material disposed thereon, masking the material with a mask having an appropriate pattern for forming a semiconductor structure, etching unmasked portions of the material so as to form the semiconductor structure, wherein the etching produces a film which attaches onto the semiconductor structure and/or on the semiconductor substrate, and removing the film from the semiconductor structure according to the steps of producing a cryogenic jet stream having cryogenic particles therein, and directing the cryogenic jet stream at the film such that the crogenic jet stream impinges on and causes the film to decrease in temperature so that a high temperature gradient develops between the film and the semiconductor structure, the film detaching from the semiconductor structure and fracturing due to contraction caused by the decrease in temperature and high temperature gradient.Type: GrantFiled: December 7, 1993Date of Patent: January 3, 1995Assignee: International Business Machines CorporationInventors: George G. Gifford, Yeong-Jyh T. Lii, Jin J. Wu
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Patent number: 5373986Abstract: A method of cleaning a metal surface includes covering the portion of the metal surface with a cleaning tape. The cleaning tape is chromium in combination with a fluoride ion source bound together by fibrillated polytetrafluoroethylene. This is applied to the portion of the area to be cleaned and is subject to heat treatment at about 1800.degree. F. and a reducing atmosphere of preferably hydrogen. This effectively cleans only the area covered by the tape. Further, the tape and binder format acts to force fluoride ions into the cracks on the surface providing a significantly improved cleaning operation.Type: GrantFiled: November 4, 1992Date of Patent: December 20, 1994Inventors: Kevin Rafferty, Bruce Rowe
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Patent number: 5372652Abstract: An aerosol cleaning apparatus for cleaning a substrate includes an aerosol producing means having a nozzle head. The nozzle head is positioned at a selected proximity and orientation to the substrate which is held by a rotatable holder. The aerosol spray dislodges particles from the substrate and the rotation of the substrate further assists in the removal of the loosened particles. A method of aerosol cleaning includes rotating a substrate at a preselected speed and spraying an aerosol jet in conjunction with the rotation to help in the removal of particles from the substrate.Type: GrantFiled: June 14, 1993Date of Patent: December 13, 1994Assignee: International Business Machines CorporationInventors: Kris V. Srikrishnan, Jin J. Wu
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Patent number: 5367838Abstract: The invention relates to an improved method and apparatus for particle blasting utilizing crystalline ice. A theory of impact erosion is presented, as opposed to conventional abrasive techniques, which allows for the development of ice blast conditions to achieve a maximum efficiency for surface cleaning and coating removal applications. By impacting a surface with ice particles which have been treated to bring their temperature near the melting point of ice, erosion is effected by a rupture process caused by the well known reaction-force. It has been found that warming of the ice particles can be realized by simply utilizing unconditioned blast air taken directly form a high pressure compressor.Type: GrantFiled: March 21, 1994Date of Patent: November 29, 1994Assignee: Ice Blast International, Inc.Inventors: Somyong Visaisouk, Somnuk Vixaysouk
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Patent number: 5367068Abstract: The present invention relates to a method for treating, and in particular for abrading surfaces, utilizing glass-like polysaccharide grits. The invention also extends to novel glass-like polysaccharide products, especially starches, and to processes for the production thereof. Additionally, there is disclosed cross-linked polysaccharide materials and glass-like starches having a substantially occluded water component. Combinations of these various polysaccharide grits and other abrasive grit materials are also disclosed.Type: GrantFiled: November 25, 1992Date of Patent: November 22, 1994Assignee: ADM Agri-Industries, Ltd.Inventors: Christopher C. Lane, Ruben P. Lenz, Costa Athanassoulias
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Patent number: 5366560Abstract: A method for effecting the continuous reliable supply of sodium bicarbonate particles to a blasting nozzle employing pressured air or water as the means for conveying such particles into impact engagement with a surface to be cleaned.Type: GrantFiled: September 3, 1993Date of Patent: November 22, 1994Assignee: Yelapa Enterprises, Inc.Inventors: Arthur C. Rubey, III, Andrew M. Taylor
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Patent number: 5364474Abstract: A method for controlling the effective velocity of a spray of cleaning material in order to remove particulate matter and other contamination from a surface of a workpiece. The surface under treatment is moved relative to the position of a sprayhead in order to increase or reduce the velocity at which the spray impacts the surface. In one embodiment, the workpiece is mounted on a disk-shaped support plate. The sprayhead tracks across the support plate to direct the spray over the entire workpiece. The support plate is rotated towards the sprayhead to increase the effective spray velocity, and away from the sprayhead to decrease the effective spray velocity. Another embodiment of the invention adjusts the speed of rotation of the support plate in such a manner that the spray maintains a constant effective velocity as the sprayhead is moved radially across the support plate.Type: GrantFiled: July 23, 1993Date of Patent: November 15, 1994Inventor: John F. Williford, Jr.
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Patent number: 5364472Abstract: A system for cleaning test probes attached to a probe mat fixture by propelling CO.sub.2 pellets at the test probes, by rotating the fixture so that the pellets impact different sides of the test probes, and by providing electrostatic protection for active devices mounted on the probemat fixture. The CO.sub.2 pellets are propelled so that they strike the test probes at an angle to the horizontal plane of the test probe as mounted on the probemat fixture. Electrostatic protection is provided by connecting all electrical connections to the probemat fixture to ground and by reducing electrostatic charge build up on the probemat fixture by using an ionizer to direct ions at the probemat fixture.Type: GrantFiled: July 21, 1993Date of Patent: November 15, 1994Assignee: AT&T Bell LaboratoriesInventors: Garrett J. Heyns, Terry R. McClure, Hugh Nicholl, Peter H. Read, Steven M. Schulte, Mohammad F. Tabrizi
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Patent number: 5360903Abstract: The present invention relates to a method for treating, and in particular for abrading surfaces, utilizing glass-like polysaccharide grits. The invention also extends to novel glass-like polysaccharide products, especially starches, and to processes for the production thereof. Additionally, there is disclosed cross-linked polysaccharide materials and glass-like starches having a substantially occluded water component. Combinations of these various polysaccharide grits and other abrasive grit materials are also disclosed.Type: GrantFiled: November 25, 1992Date of Patent: November 1, 1994Assignee: ADM Agri-Industries, Ltd.Inventors: Christopher C. Lane, Ruben P. Lenz, Costa Athanassoulias
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Patent number: 5360486Abstract: This invention relates to a blast cleaning apparatus and method which includes a laterally moving conveyor with openings therethrough, and particularly a laterally moving wire mesh conveyor. The conveying surface is moved laterally such that there is lateral movement of the conveyor surface in the blast cleaning chamber. The lateral movement is relative to the workpiece and is substantially horizontal and substantially transverse to the direction of advancement of the conveyor. The conveying surface is moved relative to the workpiece so as to expose to upwardly directed cleaning material areas of the workpiece that would otherwise be protected from the cleaning material by material separating the openings in the conveying surface.Type: GrantFiled: September 2, 1993Date of Patent: November 1, 1994Assignee: Blast Cleaning Products Ltd.Inventor: Charles P. Elliott
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Patent number: 5354384Abstract: An improved apparatus and method for removing trace contaminants from the surface of a chosen substrate, such as delicate surfaces or precision parts, wherein the improvement consists of heating a portion of a chosen substrate surface immediately before, during and/or after application of a stream of cleaning snow to the same portion of the substrate surface.Type: GrantFiled: April 30, 1993Date of Patent: October 11, 1994Assignee: Hughes Aircraft CompanyInventors: John D. Sneed, Wilfried Krone-Schmidt, Michael J. Slattery, Howard S. Bowen
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Patent number: 5347069Abstract: Disclosed is a process for treating oily wastes, which have a predominantly liquid phase, by mixing the oily waste with a granulating medium under turbulent flow conditions. The process comprises mixing the oily waste with a granulating medium under such conditions, wherein granules are formed having an attrition index of less than about 10 percent and a filtration index of greater than 0.20 gallons per minute per square foot. The contaminating hydrocarbons may then be removed by contacting the granules with a solvent capable of removing at least a portion of the contaminating hydrocarbons. The granules are then recovered by means known in the art.Type: GrantFiled: October 27, 1992Date of Patent: September 13, 1994Assignee: Chevron Research and Technology CompanyInventor: Parameshwaran S. Sundar
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Patent number: 5344494Abstract: A method for the cleaning of roughened surface or porous-coated medical implants of all kinds. In the cleaning method, the roughened surface or porous-coated implant is subjected to blasting with particulate solids selected from the solids that are soluble in a biocompatible non-toxic solvent and solids that deliquesce, sublimate or vaporize. The particulate solids must be sufficiently hard to provide effective impact for dislodging debris and loosely attached particles from implant surfaces. After blasting, the surface is optionally treated with ultrasonic vibration to further remove debris particulates. The impacted surfaces may also be rinsed with a biocompatible liquid. After cleaning, the surfaces may be passivated by immersion in conventional passivation solutions or a solution of non-aggressive oxyanions.Type: GrantFiled: January 21, 1993Date of Patent: September 6, 1994Assignee: Smith & Nephew Richards, Inc.Inventors: James A. Davidson, Ajit K. Mishra
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Patent number: 5336329Abstract: A process for decontaminating a surface contaminated with a toxic agent in which the surface is contacted with a sorbent selected from the class consisting of a carbonaceous resin which contains a strong base in its pores, a macroreticular ion exchange resin which has a strong base hydroxide functionality and which contains water in its pores or a macronet resin which has been impregnated with a Lewis acid and then removing the toxic agent from the surface thereby decontaminating the surface.Type: GrantFiled: December 7, 1992Date of Patent: August 9, 1994Assignee: Rohm and Haas CompanyInventor: Eric J. Langenmayr
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Patent number: 5332447Abstract: A blast media for stripping contaminants from a solid surface comprises abrasive particles and a surfactant in the form of a granular surfactant-clathrate compound formed of a surfactant and a water soluble compound having clathration capability such as urea. The surfactant reduces the amount of water soluble residues which remain on the targeted surface and enhances the removal of dirt, grease and oil from the targeted surface.Type: GrantFiled: January 21, 1993Date of Patent: July 26, 1994Assignee: Church & Dwight Co., Inc.Inventors: Anthony E. Winston, Benny S. Yam, Keith A. Jones
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Method and system for removing a coating from a substrate using radiant energy and a particle stream
Patent number: 5328517Abstract: A method is provided for removing material from a structure having at least one layer of material formed on a substrate. The method includes the steps of irradiating a target area of a structure with radiant energy sufficient to break or weaken chemical bonds in the material, and impinging the target area with a particle stream to remove the pyrolyzed material from the structure. The method may be implemented by a system comprising a housing having a window; a radiant energy source mounted in the housing for irradiating the target area of the structure with the radiant energy; and a nozzle mounted to the exterior of the housing for directing the stream of particles at the target area.Type: GrantFiled: December 24, 1991Date of Patent: July 12, 1994Assignees: McDonnell Douglas Corporation, Maxwell Laboratories, Inc., Cold Jet, Inc.Inventors: Michael C. Cates, Richard R. Hamm, Michael W. Lewis, Wayne N. Schmitz -
Patent number: 5322532Abstract: A blast media for stripping contaminants from a substrate comprises abrasive particles which are formed by agglomerating fine particles of sodium bicarbonate with an aqueous binder solution of sodium carbonate to form composite particles of sodium bicarbonate and sodium sesquicarbonate which is formed by the reaction of the bicarbonate with the carbonate in solution.Type: GrantFiled: June 10, 1993Date of Patent: June 21, 1994Assignee: Church & Dwight Co., Inc.Inventor: Andrew D. Kurtz
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Patent number: 5319946Abstract: Apparatus for the storage and projection of ice balls comprising in combination:a revolving tank terminated by an opening in the lower part for linking with a ball injection chamber (44) to which are fixed:a) a motor (32) able to rotate an axial rod (30) equipped with mixing or stirring blades (36) of an Archimedean screw (38) and, between the two, a means for sealing the passage of the balls (40),b) a jack (34) able to control a translation of the axial rod (30),a gun (4) for projecting the balls and connected to the outlet (58) of the injection chamber,a compressed air source (6),on the gun, a double contact trigger (60), the first contact of which controls the injection of air and the second contact controls the raising jack (34) of the axial rod (30) and the rotation of the motor (32).Type: GrantFiled: December 28, 1992Date of Patent: June 14, 1994Assignee: Commissariat a l'Energie AtomiqueInventor: Andre Manificat
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Patent number: 5318636Abstract: The present invention relates to a method and an apparatus for cleaning surfaces, in particular sensitive surfaces contaminated and attacked by environmental influences, by means of a jet of fine grain blast material and air. A blast material is used which contains crystals and/or particles of at least one cleaning agent crystallized by cooling.Type: GrantFiled: April 17, 1992Date of Patent: June 7, 1994Assignees: Eva Abony Szucs, Peter BrauInventor: Johann Szucs
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Patent number: 5316587Abstract: A blast media for stripping contaminants from a solid surface comprises water soluble abrasive particles and a surfactant which reduces the amount of water soluble residues of blast media remaining on the targeted surface and which enables any residues which remain to be readily removed by fresh water.Type: GrantFiled: January 21, 1993Date of Patent: May 31, 1994Assignee: Church & Dwight Co., Inc.Inventors: Benny S. Yam, Amy L. Joseph, Anthony E. Winston, Keith A. Jones
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Patent number: 5316591Abstract: Undesired material is removed from a chosen substrate by a process comprising the steps of (a) placing the substrate containing the undesired material in a cleaning chamber provided with cavitation-producing means; (b) introducing a liquefied gas, such as liquid carbon dioxide, into the cleaning chamber and contacting the substrate containing the undesired material with the liquid carbon dioxide at a temperature below its critical temperature; and (c) exposing the liquid carbon dioxide to the cavitation-producing means for a period of time sufficient to remove the undesired material from the substrate. The substrate containing the undesired material may optionally be contacted with carbon dioxide in the dense phase prior to and/or after the cavitation treatment to aid in removal of the undesired material. Further, spent liquid carbon dioxide may be treated to regenerate fresh liquid carbon dioxide which is recycled to the cleaning chamber.Type: GrantFiled: August 10, 1992Date of Patent: May 31, 1994Assignee: Hughes Aircraft CompanyInventors: Sidney C. Chao, Edna M. Purer, Thomas B. Stanford, Carl W. Townsend
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Patent number: 5314544Abstract: A localized surface area of an open foam type metal substrate of an electrochemical cell electrode, where the substrate is filled with active material and compressed, is subjected to light pressure scrubbing by a heated soldering iron tip subjected to ultrasonic vibration to quickly dislodge the active material network of the open foam type metal substrate. Compressed air at approximately 100 psi is blown through the open foam type metal substrate to remove dislodged active material particles from the foam type metal substrate to permit effective welding of a metal terminal connection to the substrate at the localized area after cleaning. Alternatively, both opposite surfaces of the open foam type metal substrate at the localized area may be brushed to initially dislodge the active material from the pores of the open foam type metal substrate and the dislodged particles blown through the substrate from one surface to the other.Type: GrantFiled: May 18, 1993Date of Patent: May 24, 1994Assignee: Saft America, Inc.Inventor: Salah Oweis
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Patent number: 5312520Abstract: To prepare a metallic surface for adhesive bonding, surface irregularities and contaminants are removed. This first step is followed by repeated cleaning of the metallic surface with a solvent and testing of the metallic surface for uniformity. Next, new surface material is exposed by blasting or abrading the surface material. Subsequently, the surface is cleaned and again tested for uniformity. Finally, the surface is treated with a silane solution and dried prior to bonding.Type: GrantFiled: January 21, 1993Date of Patent: May 17, 1994Assignee: E-Systems, Inc.Inventor: Jaycee H. Chung
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Patent number: 5310429Abstract: A hard contact lens formed of a polymer having silicon and chlorine incorporated therein is exposed to a solution containing an admixture, an alkylphenyl polyether alcohol surfactant, a second surfactant which is anionic and a third surfactant having a preservative action and the solution is rubbed against the contact lens to remove surface deposits thereon.Type: GrantFiled: December 2, 1992Date of Patent: May 10, 1994Assignee: Polymer Technology CorporationInventors: Maylee H. Chou, Edward J. Ellis
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Patent number: 5308403Abstract: A blast media for stripping coatings or other contaminants from a solid surface comprises water soluble abrasive particles and a rinse aid which reduces the amount of water soluble residues of blast media remaining on the targeted surface and which enables any residues which remain to be readily removed by fresh water. The rinse aid can include magnesium oxide or a mixture thereof with one or more surfactants.Type: GrantFiled: January 21, 1993Date of Patent: May 3, 1994Assignee: Church & Dwight Co., Inc.Inventors: Benny S. Yam, Anthony E. Winston
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Patent number: 5308404Abstract: A blast media for stripping contaminants from very soft and sensitive substrates comprises compacted abrasive particles which are formed by compacting very fine particles of the abrasive into larger particles which are friable and which will break apart into fine particles upon contacting the substrate surface.Type: GrantFiled: January 21, 1993Date of Patent: May 3, 1994Assignee: Church & Dwight Co., Inc.Inventors: Benny S. Yam, Amy L. Joseph, Keith A. Jones
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Patent number: 5302324Abstract: Applying shotblast or sandblast to a substance contaminated with radioactivity, cleaning the substance with a liquid, washing the grit of shotblast or sandblast with an organic solvent, filtering the resulting organic solvent, decontaminating the organic solvent itself by distilling the organic solvent filtered, and using this decontaminated solvent for washing said grit.Type: GrantFiled: March 19, 1991Date of Patent: April 12, 1994Assignee: Morikawa Sangyo Kabushiki KaishaInventors: Kenji Morikawa, Yasuo Shimizu, Akira Doi
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Patent number: 5294261Abstract: A method is disclosed for cleaning microelectronic surfaces using an aerosol of at least substantially solid argon or nitrogen particles which impinge upon the surface to be cleaned and then evaporate and the resulting gas is removed by venting along with the contaminants dislodged by the cleaning method.Type: GrantFiled: November 2, 1992Date of Patent: March 15, 1994Assignees: Air Products and Chemicals, Inc., International Business Machines CorporationInventors: Wayne T. McDermott, Richard C. Ockovic, Jin J. Wu, Douglas W. Cooper, Alexander Schwarz, Henry L. Wolfe
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Patent number: 5294001Abstract: Apparatus and method for cleaning the oil off of oil covered parts by the employment of oil absorbing particulate such as ground corncob. The oil covered parts and oil absorbing particulate are mixed together in a tumbler for a period sufficient to bring each of the parts into contact with the oil absorbing particulate. Much of the particulate adheres to the oil covered parts. Thus, following mixing, the particulate adhered parts are subjected to a series of vibrating, impinging, tumbling, and air blowing actions which remove the adhering particulate from the parts and direct the oil absorbed particulate and cleaned parts into two separate, respective vessels.Type: GrantFiled: October 28, 1991Date of Patent: March 15, 1994Assignee: Dulin Metals Co.Inventor: Harvey S. Dulin
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Patent number: 5290364Abstract: A process for blast cleaning an article having internal passageways that produces a clean, weldable, and brazable article that is free of blast media residue. The process includes blasting the internal passageways of the article with a soluble blast media, rinsing the article with a solvent in which the blast media is soluble, and removing the solvent from the internal passageways of the article using a stream of air.Type: GrantFiled: July 22, 1992Date of Patent: March 1, 1994Assignee: Grand Northern Products, Ltd.Inventors: John Stein, Philip M. Whitney
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Patent number: 5266122Abstract: A method for blast cleaning metal and fixing the hazardous waste generated by blast cleaning. An abrasive cement in a sufficient amount is combined with the blast cleaning process, thereby reducing the leachability of the heavy metals and producing non-hazardous abrasive waste.Type: GrantFiled: August 28, 1991Date of Patent: November 30, 1993Assignee: The TDJ Group, Inc.Inventors: D. J. Rapp, Redmond R. Clark, Michael McGrew
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Patent number: 5254177Abstract: A method of treating blocks of waste paraffin wax entailing initially subdividing the wax into particles less than one cubic inch in size, and preferably in elongated string or rod form, then intimately mixing the particles with a viscous hydrocarbon liquid in a first mixing zone by agitation. The mixture is passed through a centrifugal pump where further mixing and further comminution of the wax particles occurs as a result of cavitation and pump impeller impact. A slurry of wax in hydrocarbon is discharged from the centrifugal pump and recycled at least once back through the first mixing zone and then back to the pump.Type: GrantFiled: February 10, 1992Date of Patent: October 19, 1993Assignee: Paraffin Solutions, Inc.Inventor: Carl J. Chauvin