Patents by Inventor Douglas B. Pearl
Douglas B. Pearl 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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Patent number: 11389856Abstract: A tool including a front housing and an expander head ring that is readily attachable and detachable from the front housing. The front housing may be coupled to the tool body, or can be integral with the tool body. The front housing may have a mating end that has one or more locking tabs that are configured to be engaged by the expander head ring. The expander head ring may carry one or more functional elements such as a die set that may be expanded by insertion of an expander extending from the tool such as by manual actuation of the tool. A plurality of expander head rings, each with a different size die set, can be alternatively attached to the front housing, depending on the desired extent of expanding of the pipe or the like with the tool.Type: GrantFiled: January 28, 2019Date of Patent: July 19, 2022Assignee: Uniweld Products, Inc.Inventors: David S. Pearl, II, Douglas B. Pearl, Dragan Bukur, David Foster
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Patent number: 11268742Abstract: 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: GrantFiled: January 18, 2017Date of Patent: March 8, 2022Assignee: Uniweld Products, Inc.Inventors: David S. Pearl, II, Dragan Bukur, David Foster, Douglas B. Pearl
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Patent number: 11143445Abstract: A hose having an upstream end and a downstream end, each of the upstream and downstream ends including a connecting member to connect the hose arrangement to, for example, the high side or the low side of an air conditioning or refrigeration unit, or to a manifold. An intermediate access fitting is provided along the length of the hose, such as a T-shaped fitting, and provides a port to enable the hose arrangement to be connected to a device conveniently and without the necessity of adapters. Also disclosed is a method of evacuating or dehydrating an air conditioning or refrigeration system using the hose.Type: GrantFiled: April 1, 2015Date of Patent: October 12, 2021Assignee: Uniweld Products, Inc.Inventors: Douglas B. Pearl, David Foster
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Publication number: 20210247013Abstract: Locking device and seal for an access fitting/valve, and methods of locking an access fitting/valve. The locking device may comprise an outer housing having a first internal cavity and an upper surface having an aperture; an inner housing configured to be received in the internal cavity of the outer housing, the inner housing having a second internal cavity defined by side walls at least a portion of which having internal threads for threadably connecting to an access fitting having corresponding external threads, the inner housing further having a recess having a keyed shape configured to be received by a corresponding tool or key. The inner housing is independently rotatable inside the outer housing about a common or coaxial longitudinal axis, and thus is spaced from the inner side wails of the outer housing when in the assembled condition.Type: ApplicationFiled: January 12, 2021Publication date: August 12, 2021Inventors: Dragan Bukur, David S. Pearl, II, David Foster, Douglas B. Pearl
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Publication number: 20200041060Abstract: Device and method for injecting one or more additives into systems, such as a sealing agent to repair leaks in such systems, including air conditioning and refrigeration systems. In certain embodiments, the device is a disposable or single-use device, and includes a hose, tube, or conduit or the like that contains a sealing agent. Introduction of the sealing agent into the closed system allows the sealing agent to travel through the system and seal leaks therein. In some embodiments, one end of the hose is configured to connect to a manifold, and the other end of the device is configured to connect to the unit to be sealed. A check valve prevents unwanted backflow of refrigerant from the unit to be sealed.Type: ApplicationFiled: January 18, 2018Publication date: February 6, 2020Inventors: David S. Pearl, II, Douglas B. Pearl, Dragan Bukur
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Publication number: 20190168282Abstract: A tool including a front housing and an expander head ring that is readily attachable and detachable from the front housing. The front housing may be coupled to the tool body, or can be integral with the tool body. The front housing may have a mating end that has one or more locking tabs that are configured to be engaged by the expander head ring. The expander head ring may carry one or more functional elements such as a die set that may be expanded by insertion of an expander extending from the tool such as by manual actuation of the tool. A plurality of expander head rings, each with a different size die set, can be alternatively attached to the front housing, depending on the desired extent of expanding of the pipe or the like with the tool.Type: ApplicationFiled: January 28, 2019Publication date: June 6, 2019Inventors: David S. Pearl, II, Douglas B. Pearl, Dragan Bukur, David Foster
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Patent number: 10281067Abstract: 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: August 7, 2018Date of Patent: May 7, 2019Assignee: Uniweld Products, Inc.Inventors: David S. Pearl, II, Douglas B. Pearl, Dragan Bukur
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Patent number: 10226810Abstract: A tool including a front housing and an expander head ring that is readily attachable and detachable from the front housing. The front housing may be coupled to the tool body, or can be integral with the tool body. The front housing may have a mating end that has one or more locking tabs that are configured to be engaged by the expander head ring. The expander head ring may carry one or more functional elements such as a die set that may be expanded by insertion of an expander extending from the tool such as by manual actuation of the tool. A plurality of expander head rings, each with a different size die set, can be alternatively attached to the front housing, depending on the desired extent of expanding of the pipe or the like with the tool.Type: GrantFiled: June 5, 2017Date of Patent: March 12, 2019Assignee: Uniweld Products, Inc.Inventors: David S. Pearl, II, Douglas B. Pearl, Dragan Bukur, David Foster
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Publication number: 20180340637Abstract: 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 7, 2018Publication date: November 29, 2018Inventors: David S. Pearl, II, Douglas B. Pearl, Dragan Bukur
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Patent number: 10066769Abstract: 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: January 22, 2018Date of Patent: September 4, 2018Assignee: Uniweld Products, Inc.Inventors: David S. Pearl, II, Douglas B. Pearl, Dragan Bukur
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Patent number: 9987730Abstract: 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: GrantFiled: October 15, 2015Date of Patent: June 5, 2018Assignee: Uniweld Products, Inc.Inventors: David S. Pearl, II, Douglas B. Pearl, David Foster, Dragan Bukur
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Publication number: 20180142813Abstract: 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: January 22, 2018Publication date: May 24, 2018Inventors: David S. Pearl, II, Douglas B. Pearl, Dragan Bukur
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Patent number: 9897237Abstract: 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: August 26, 2015Date of Patent: February 20, 2018Assignee: Uniweld Products, Inc.Inventors: David S. Pearl, II, Douglas B. Pearl, Dragan Bukur
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Publication number: 20170348754Abstract: A tool including a front housing and an expander head ring that is readily attachable and detachable from the front housing. The front housing may be coupled to the tool body, or can be integral with the tool body. The front housing may have a mating end that has one or more locking tabs that are configured to be engaged by the expander head ring. The expander head ring may carry one or more functional elements such as a die set that may be expanded by insertion of an expander extending from the tool such as by manual actuation of the tool. A plurality of expander head rings, each with a different size die set, can be alternatively attached to the front housing, depending on the desired extent of expanding of the pipe or the like with the tool.Type: ApplicationFiled: June 5, 2017Publication date: December 7, 2017Inventors: David S. Pearl, II, Douglas B. Pearl, Dragan Bukur, David Foster
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Patent number: 9803901Abstract: 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: GrantFiled: January 28, 2011Date of Patent: October 31, 2017Assignee: Uniweld Products, Inc.Inventors: David S. Pearl, II, Dragon Bukur, David Foster, Douglas B. Pearl
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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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Publication number: 20160290694Abstract: A hose having an upstream end and a downstream end, each of the upstream and downstream ends including a connecting member to connect the hose arrangement to, for example, the high side or the low side of an air conditioning or refrigeration unit, or to a manifold. An intermediate access fitting is provided along the length of the hose, such as a T-shaped fitting, and provides a port to enable the hose arrangement to be connected to a device conveniently and without the necessity of adapters. Also disclosed is a method of evacuating or dehydrating an air conditioning or refrigeration system using the hose.Type: ApplicationFiled: April 1, 2015Publication date: October 6, 2016Inventors: Douglas B. Pearl, David Foster
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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