Patents by Inventor David S. Pearl, II
David S. Pearl, II has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20170122632Abstract: Gas vaporizer for flashing liquid to vapor received from a source prior to introduction into a compressor or the like, such as in air conditioning or refrigeration systems. In certain embodiments the vaporize includes an adapter member for connection to a liquid source, a connector member having a plurality of flow passages for facilitating the transfer of heat to fluid present therein to vaporize the same, a body portion providing visual access such as via one or more sight glasses to an internal chamber therein for visual confirmation that liquid has been vaporized, and a hose connecting member for connection to a point of destination such as a compressor. In certain embodiments, the connector has an axial bore containing a high thermal conductive material.Type: ApplicationFiled: January 18, 2017Publication date: May 4, 2017Inventors: David S. Pearl, II, Dragan Bukur, David Foster, Douglas B. Pearl
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Publication number: 20170106506Abstract: An adapter comprising an elongated member having an intermediate body region to be received by a tool in locking engagement, a first region extending in a first direction axially from the intermediate body region and having a first keyed free end having a cross-section of a first size, and a second region extending axially from the intermediate body region in a second direction opposite the first direction and having a second keyed free end having a cross section of a second size different from the first size. The adapter can be used to actuate sockets of different size.Type: ApplicationFiled: October 15, 2015Publication date: April 20, 2017Inventors: David S. Pearl, II, Douglas B. Pearl, David Foster, Dragan Bukur
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Patent number: 9383046Abstract: A fitting, such as an anti-blowback fitting, that includes a friction reducing device that enables easy removal of the fitting from a high pressure connection such as one associated with an HVAC unit. When used in connection with refrigeration, anti-blow back fittings function to keep the refrigerant in the hose to which it is connected in order to minimize or prevent the refrigerant from escaping to the environment. In certain embodiments, a friction reducing device is positioned in the fitting, and decreases the load on the rear housing, which enables easy rotation of the outer or swivel housing of the fitting to remove the same from the high pressure connection. In certain embodiments, the friction reducing device is a thrust bearing.Type: GrantFiled: March 14, 2013Date of Patent: July 5, 2016Assignee: Uniweld Products, Inc.Inventors: David S. Pearl, II, Douglas B. Pearl, Dragan Bukur
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Patent number: 9328870Abstract: Flow regulator, system and method that allow regulation of gas flow, both during a purging operation such as to purge a line of oxygen, and during a brazing operation to maintain the line free or substantially free of oxygen during the brazing operation. The system includes a gas source, such as a nitrogen tank containing a source of nitrogen, a gas regulator in fluid communication with the gas source to regulate the delivery pressure from the gas source, and a flow regulator in fluid communication with the gas source to regulate the flow of gas during the purge and brazing operations. The flow regulator provides a visual indication that gas is flowing, and a visual indication of the particular flow rate of the flowing gas.Type: GrantFiled: January 16, 2014Date of Patent: May 3, 2016Assignee: Uniweld Products, Inc.Inventors: David S. Pearl, II, Dragan Bukur, David Foster, Douglas B. Pearl
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Publication number: 20150362102Abstract: A fitting, such as an anti-blowback fitting, that includes a friction reducing device that enables easy removal of the fitting from a high pressure connection such as one associated with an HVAC unit. When used in connection with refrigeration, anti-blow back fittings function to keep the refrigerant in the hose to which it is connected in order to minimize or prevent the refrigerant from escaping to the environment. In certain embodiments, a friction reducing device is positioned in the fitting, and decreases the load on the rear housing, which enables easy rotation of the outer or swivel housing of the fitting to remove the same from the high pressure connection. In certain embodiments, the friction reducing device is a thrust bearing.Type: ApplicationFiled: August 26, 2015Publication date: December 17, 2015Inventors: David S. Pearl, II, Douglas B. Pearl, Dragan Bukur
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Publication number: 20150198287Abstract: Flow regulator, system and method that allow regulation of gas flow, both during a purging operation such as to purge a line of oxygen, and during a brazing operation to maintain the line free or substantially free of oxygen during the brazing operation. The system includes a gas source, such as a nitrogen tank containing a source of nitrogen, a gas regulator in fluid communication with the gas source to regulate the delivery pressure from the gas source, and a flow regulator in fluid communication with the gas source to regulate the flow of gas during the purge and brazing operations. The flow regulator provides a visual indication that gas is flowing, and a visual indication of the particular flow rate of the flowing gas.Type: ApplicationFiled: January 16, 2014Publication date: July 16, 2015Inventors: David S. Pearl, II, Dragan Bukur, David Foster, Douglas B. Pearl
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Publication number: 20140265317Abstract: A fitting, such as an anti-blowback fitting, that includes a friction reducing device that enables easy removal of the fitting from a high pressure connection such as one associated with an HVAC unit. When used in connection with refrigeration, anti-blow back fittings function to keep the refrigerant in the hose to which it is connected in order to minimize or prevent the refrigerant from escaping to the environment. In certain embodiments, a friction reducing device is positioned in the fitting, and decreases the load on the rear housing, which enables easy rotation of the outer or swivel housing of the fitting to remove the same from the high pressure connection. In certain embodiments, the friction reducing device is a thrust bearing.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Applicant: UNIWELD PRODUCTS, INC.Inventors: David S. Pearl, II, Douglas B. Pearl, Dragan Bukur
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Patent number: 8181665Abstract: A flushing unit for flushing vapor compressions systems with a flushing agent. The flushing unit includes a pressure relief member to ensure that the reservoir containing the flushing agent is not over-pressurized. In certain embodiments, the flushing unit is adapted to be in communication with a driving fluid or propellant, such as an inert gas or a flushing gas, and with a source of a flushing agent, such as a reservoir. The flushing unit includes a valve that, when opened, causes the driving fluid to flow into the reservoir containing the flushing agent and displace the flushing agent from the reservoir, causing it to ultimately flow into the system being flushed such as via a suitable hand-held injector. In the event the pressure in the reservoir exceeds a predetermined level, a pressure relief valve in the flushing unit is automatically actuated, thereby relieving pressure in the otherwise closed system.Type: GrantFiled: May 8, 2009Date of Patent: May 22, 2012Assignee: Uniweld Products, Inc.Inventors: David S. Pearl II, Dragan Bukur
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Publication number: 20120023972Abstract: Gas vaporizer for flashing liquid to vapor received from a source prior to introduction into a compressor or the like, such as in air conditioning or refrigeration systems. In certain embodiments the vaporize includes an adapter member for connection to a liquid source, a connector member having a plurality of flow passages for facilitating the transfer of heat to fluid present therein to vaporize the same, a body portion providing visual access such as via one or more sight glasses to an internal chamber therein for visual confirmation that liquid has been vaporized, and a hose connecting member for connection to a point of destination such as a compressor. In certain embodiments, the connector has an axial bore containing a high thermal conductive material.Type: ApplicationFiled: January 28, 2011Publication date: February 2, 2012Applicant: UNIWELD PRODUCTS, INC.Inventors: David S. Pearl, II, Dragan Bukur, David Foster, Douglas B. Pearl
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Publication number: 20100282336Abstract: A flushing unit for flushing vapor compressions systems with a flushing agent. The flushing unit includes a pressure relief member to ensure that the reservoir containing the flushing agent is not over-pressurized. In certain embodiments, the flushing unit is adapted to be in communication with a driving fluid or propellant, such as an inert gas or a flushing gas, and with a source of a flushing agent, such as a reservoir. The flushing unit includes a valve that, when opened, causes the driving fluid to flow into the reservoir containing the flushing agent and displace the flushing agent from the reservoir, causing it to ultimately flow into the system being flushed such as via a suitable hand-held injector. In the event the pressure in the reservoir exceeds a predetermined level, a pressure relief valve in the flushing unit is automatically actuated, thereby relieving pressure in the otherwise closed system.Type: ApplicationFiled: May 8, 2009Publication date: November 11, 2010Inventors: David S. Pearl, II, Dragan Bukur
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Patent number: 6471114Abstract: Torch tip for a torch, the tip adapted to be in fluid communication with a fuel gas and oxygen source for generating a flame, the torch tip including a tubular or substantially tubular body having a plurality of flame emitting spaced orifices, wherein the tubular body preferably is substantially U-shaped and includes a pair of spaced substantially parallel elongated legs. The torch tip can be used to simultaneously heat a plurality of closely spaced pipes for ease of removal or attachment to an object such as a reversing valve.Type: GrantFiled: November 7, 2001Date of Patent: October 29, 2002Assignee: Uniweld Products, Inc.Inventors: David S. Pearl, II, David A. Foster, Frank G. Smith
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Patent number: 6467703Abstract: Torch tip for a torch, said tip adapted to be in fluid communication with a fuel gas and oxygen source for generating a flame, the torch tip including a tubular or substantially tubular body having a plurality of spaced orifices therein, at least one of the orifices being formed in a planar surface so as to allow the formation of a circular orifice therein, the orifice thereby emitting, in operation, a stable and even flame. In a preferred embodiment, all of the orifices are so formed, and direct a flame towards a common point.Type: GrantFiled: September 10, 1998Date of Patent: October 22, 2002Assignee: Uniweld Products, Inc.Inventors: David S. Pearl, II, Frank G. Smith
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Patent number: 6102062Abstract: A quick connect/disconnect coupler having a slidable piston to connect and disconnect to a standard fitting or coupling attached to suitable tubing. The coupling is slidably received by the coupler and locked in place by the piston. In the locked position, the coupling depresses a valve pin in the piston which opens a passageway in the coupler. At the same time, a depressor in the coupler depresses a valve stem in the coupling, thereby allowing bi-directional gas flow to the device being serviced from the service apparatus, or vice versa. A method of charging or discharging refrigeration apparatus with said coupler is also disclosed.Type: GrantFiled: January 26, 1999Date of Patent: August 15, 2000Assignee: Uniweld Products, Inc.Inventors: David S. Pearl, II, Frank G. Smith, Louis H. Webb, III
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Patent number: 5575639Abstract: A fuel combuster such as a torch tip, having means therein for cleaning the orifice of the tip, as well as a method of cleaning such an orifice. The combustion device comprises a metallic elongated tube having a forward section terminating in a front end, a middle section and a rearward section, the middle section communicating at its respective ends with the forward section and the rearward section. The rearward section is adapted, suitably at its rearward end, for connection to a source of combustible gas, and is suitably provided with axially positioned fuel jet means for injecting combustible gas into the tube and with apertures for intake of combustion supporting gas to be mixed with the combustible gas. The fuel jet means includes an orifice having an elongated wire passing therethrough. Movement of the wire loosens any dirt in the orifice.Type: GrantFiled: March 31, 1994Date of Patent: November 19, 1996Assignee: Uniweld Products, Inc.Inventor: David S. Pearl, II
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Patent number: 5533891Abstract: An automatic locking pressure regulator or valve for a fuel tank. The regulator or valve includes locking means which prevent loosening of the regulator or valve from a standard fuel cylinder valve outlet connection. In a preferred embodiment of the present invention, the locking mechanism is coupled to the base of the regulator or valve, and protrudes into the threads on the standard fitting on the fuel cylinder to prevent one-way rotation of the pressure regulator or valve.Type: GrantFiled: January 11, 1995Date of Patent: July 9, 1996Assignee: Uniweld Products, Inc.Inventors: David S. Pearl, II, Frank G. Smith
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Patent number: 5470226Abstract: A fuel combuster such as a torch tip, having means fixed ignition means and means for encapsulating the same. The combustion device comprises a metallic elongated tube having a forward section terminating in a front end, a middle section and a rearward section, the middle section communicating at its respective ends with the forward section and the rearward section. The rearward section is adapted, suitably at its rearward end, for connection to a source of combustible gas, and is suitably provided with axially positioned fuel jet means for injecting combustible gas into the tube and with apertures for intake of combustion supporting gas to be mixed with the combustible gas. A spring-loaded piezo crystal is affixed to the middle portion and is activated by grasping a cap assembly encapsulating the piezo crystal and applying a downward force thereto. The device can be ignited regardless of the orientation of the torch tip on the gas supply source.Type: GrantFiled: June 29, 1994Date of Patent: November 28, 1995Assignee: Uniweld Products, Inc.Inventors: David S. Pearl, II, Frank G. Smith
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Patent number: 5333467Abstract: An apparatus and method for preventing an undesirable release of fluid from a conduit upon disconnection of the conduit. In a specific form of the invention, the apparatus includes a hose having a slide valve located therein adjacent an end of the hose for preventing the escape of liquids or gases, especially refrigerants, to the environment. The slide valve includes a substantially cylindrically shaped nipple having first and second bores extending axially therethrough, the first and second bores being divided and bounded by an integral wall of the nipple. The nipple includes a plurality of ports adjacent the integral wall which provide passages through the nipple to provide fluid communication between the first and second bores. A sleeve member is slidable disposed around the nipple and contains seals for providing a gas-tight and/or liquid-tight interface between the sleeve and the nipple.Type: GrantFiled: October 25, 1993Date of Patent: August 2, 1994Assignee: Uniweld Products, Inc.Inventors: David S. Pearl, II, Louis H. Webb, III, Shaheed Mohammed, Dragan Bukur
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Patent number: 4846670Abstract: A combustion device which includes a forward section in which a baffle has been inserted for stalling the air and fuel mixture as it passes through the torch tip, generating a linear flame. The baffle is designed to include a substantially circular inner portion of wire screen, sintered powdered metal, or ceramic material, surrounded by a solid annular or substantially annular ring. A plurality of ribs extend between the annular ring and the inside of the tube for connecting the annular ring to the tube and for defining a number of outer passages through which air/fuel mixture may pass.Type: GrantFiled: December 15, 1987Date of Patent: July 11, 1989Inventors: David S. Pearl, II, Louis H. Webb, III, Stephen B. Kocell
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Patent number: 4732559Abstract: A combustion device which includes a forward section in which a baffle has been inserted for stalling the air and fuel mixture as it passes through the torch tip, generating a linear flame. The baffle is designed to include a substantially circular inner portion of wire screen, sintered powdered metal, or ceramic material, surrounded by a solid annular or substantially annular ring. A plurality of ribs extend between the annular ring and the inside of the tube for connecting the annular ring to the tube and for defining a number of outer passages through which air/fuel mixture may pass.Type: GrantFiled: November 7, 1986Date of Patent: March 22, 1988Assignee: Uniweld Products IncorporatedInventors: David S. Pearl, II, Louis H. Webb, III, Stephen B. Kocell
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Patent number: 4661057Abstract: A fuel gas combustor which utilizes thermal assisted expansion and mixing of the fuel gas and a combustion supporting gas for more complete combustion and greater heat output. A heat transfer device provides thermal feedback from the flame to the gas expansion zone. The invention is especially useful in hand-held torch tips. In a specific embodiment, the heat transfer device include a heat conducting element, at least the intermediate portion of which is rod shaped and sheathed in a non-conducting envelope.Type: GrantFiled: April 4, 1985Date of Patent: April 28, 1987Assignee: Uniweld Products IncorporatedInventors: David S. Pearl, II, Louis H. Webb, III, Stephen B. Kocell