Patents by Inventor David M. Rockwell
David M. Rockwell 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: 11959484Abstract: Disclosed is a direct-drive refrigerant screw compressor, having: a housing; a compression chamber in the housing; a pair of rotors, each rotor of the pair of rotors being rotationally disposed in the compression chamber and including an outer surface with a screw-geared profile; wherein, for each rotor, the compressor includes: a plurality of bearing packs disposed within a respective plurality of bearing chambers; a working fluid disposed within each of the plurality of bearing chambers, the working fluid providing oil-free lubrication to the plurality of bearing packs; a plurality of bearing lubrication ports extending through the housing and into each of the plurality of bearing chambers, and configured for injecting the working fluid into each of the plurality of bearing chambers when the compressor is running.Type: GrantFiled: May 20, 2020Date of Patent: April 16, 2024Assignee: CARRIER CORPORATIONInventors: Yifan Qiu, David M. Rockwell, Amit Vaidya
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Patent number: 11959673Abstract: A refrigeration system includes a compressor for compressing a refrigerant, a condenser for cooling the refrigerant, an evaporator for heating the refrigerant, and a lubrication system for providing a lubricant mist to a movable component of the compressor. The lubrication system includes an ejector arranged in fluid communication with the compressor and the evaporator, wherein the lubricant mist is carried by the refrigerant to the movable component.Type: GrantFiled: June 26, 2018Date of Patent: April 16, 2024Assignee: CARRIER CORPORATIONInventors: Jeremy Wallet-Laily, Ulf J. Jonsson, Charbel Rahhal, Nicolas Fonte, Zaffir A. Chaudhry, David M. Rockwell, Amit Vaidya, Scott M. MacBain, Yifan Qiu, Benjamin J. Blechman
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Publication number: 20240102472Abstract: Disclosed is a direct-drive refrigerant screw compressor, having: a housing; a compression chamber in the housing; a pair of rotors, each rotor of the pair of rotors being rotationally disposed in the compression chamber and including an outer surface with a screw-geared profile; a fluid being disposed in the compression chamber, the fluid consisting of a working fluid for providing lubrication to each rotor; a first port extending through the housing and configured for directing the fluid toward the compression chamber; and when the compressor is activated, each rotor rotates and the fluid is distributed about each rotor to lubricate each rotor.Type: ApplicationFiled: November 30, 2023Publication date: March 28, 2024Inventors: Yifan QIU, Amit VAIDYA, Ulf J. JONSSON, Zaffir A. CHAUDHRY, David M. ROCKWELL
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Patent number: 11914780Abstract: A finger-mounted device may include finger-mounted units. The finger-mounted units may each have a body that serves as a support structure for components such as force sensors, accelerometers, and other sensors and for haptic output devices. The body may have sidewall portions coupled by a portion that rests adjacent to a user's fingernail. The body may be formed from deformable material such as metal or may be formed from adjustable structures such as sliding body portions that are coupled to each other using magnetic attraction, springs, or other structures. The body of each finger-mounted unit may have a U-shaped cross-sectional profile that leaves the finger pad of each finger exposed when the body is coupled to a fingertip of a user's finger. Control circuitry may gather finger press input, lateral finger movement input, and finger tap input using the sensors and may provide haptic output using the haptic output device.Type: GrantFiled: August 11, 2022Date of Patent: February 27, 2024Assignee: Apple Inc.Inventors: Paul X Wang, Alex J. Lehmann, Michael J. Rockwell, Michael Y. Cheung, Ray L. Chang, Hongcheng Sun, Ian M. Bullock, Kyle J. Nekimken, Madeleine S. Cordier, Seung Wook Kim, David H. Bloom, Scott G. Johnston
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Patent number: 11898561Abstract: Disclosed is a direct-drive refrigerant screw compressor, having: a housing; a compression chamber in the housing; a pair of rotors, each rotor of the pair of rotors being rotationally disposed in the compression chamber and including an outer surface with a screw-geared profile; a fluid being disposed in the compression chamber, the fluid consisting of a working fluid for providing lubrication to each rotor; a first port extending through the housing and configured for directing the fluid toward the compression chamber; and when the compressor is activated, each rotor rotates and the fluid is distributed about each rotor to lubricate each rotor.Type: GrantFiled: May 19, 2020Date of Patent: February 13, 2024Assignee: CARRIER CORPORATIONInventors: Yifan Qiu, Amit Vaidya, Ulf J. Jonsson, Zaffir A. Chaudhry, David M. Rockwell
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Patent number: 11808264Abstract: A compressor has an inlet port and a discharge port. The discharge port communicates into a resonator chamber. The resonator chamber includes a first stage resonator array and a second stage resonator array downstream of the first stage resonator array with a connecting passage intermediate the first and second resonator array. Each of the resonator arrays includes a pair of spaced resonator arrays sub-portions, with each of the sub-portions including a plurality of cells extending into a housing member, and have a bottom wall and an open outer wall communicating with the flow passage, with a plurality of orifices extending into each of the cells. The orifices have a smaller diameter than a hydraulic diameter of the cells.Type: GrantFiled: August 27, 2019Date of Patent: November 7, 2023Assignee: CARRIER CORPORATIONInventors: Ramons A. Reba, Duane C. McCormick, David M. Rockwell, Mark W. Wilson
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Publication number: 20220372978Abstract: A screw compressor includes an outlet housing. The outlet housing includes a passage that is configured to communicate compressed fluid from a screw rotor to a discharge. A removable cover plate is configured to cover a portion of the passage. A method of varying a volume index for a screw compressor is also disclosed.Type: ApplicationFiled: October 7, 2020Publication date: November 24, 2022Inventors: David Okhman, David M. Rockwell, Amit Vaidya, Yifan Qiu, Brandon Schwoeppe, Joshua S. Lavoie
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Publication number: 20220074415Abstract: Disclosed is a direct-drive refrigerant screw compressor, having: a housing; a compression chamber in the housing; a pair of rotors, each rotor of the pair of rotors being rotationally disposed in the compression chamber and including an outer surface with a screw-geared profile; wherein, for each rotor, the compressor includes: a plurality of bearing packs disposed within a respective plurality of bearing chambers; a working fluid disposed within each of the plurality of bearing chambers, the working fluid providing oil-free lubrication to the plurality of bearing packs; a plurality of bearing lubrication ports extending through the housing and into each of the plurality of bearing chambers, and configured for injecting the working fluid into each of the plurality of bearing chambers when the compressor is running.Type: ApplicationFiled: May 20, 2020Publication date: March 10, 2022Inventors: Yifan QIU, David M. ROCKWELL, Amit VAIDYA
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Publication number: 20220065252Abstract: Disclosed is a direct-drive refrigerant screw compressor, having: a housing; a compression chamber in the housing; a pair of rotors, each rotor of the pair of rotors being rotationally disposed in the compression chamber and including an outer surface with a screw-geared profile; a fluid being disposed in the compression chamber, the fluid consisting of a working fluid for providing lubrication to each rotor; a first port extending through the housing and configured for directing the fluid toward the compression chamber; and when the compressor is activated, each rotor rotates and the fluid is distributed about each rotor to lubricate each rotor.Type: ApplicationFiled: May 19, 2020Publication date: March 3, 2022Inventors: Yifan QIU, Amit VAIDYA, Ulf J. JONSSON, Zaffir A. CHAUDHRY, David M. ROCKWELL
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Publication number: 20210247115Abstract: A refrigeration system includes a compressor for compressing a refrigerant, a condenser for cooling the refrigerant, an evaporator for heating the refrigerant, and a lubrication system for providing a lubricant mist to a movable component of the compressor. The lubrication system includes an ejector arranged in fluid communication with the compressor and the evaporator, wherein the lubricant mist is carried by the refrigerant to the movable component.Type: ApplicationFiled: June 26, 2018Publication date: August 12, 2021Inventors: Jeremy Wallet-Laily, Ulf J. Jonsson, Charbel Rahhal, Nicolas Fonte, Zaffir A. Chaudhry, David M. Rockwell, Amit Vaidya, Scott M. MacBain, Yifan Qiu, Benjamin J. Blechman
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Publication number: 20210199114Abstract: A compressor has an inlet port and a discharge port. The discharge port communicates into a resonator chamber. The resonator chamber includes a first stage resonator array and a second stage resonator array downstream of the first stage resonator array with a connecting passage intermediate the first and second resonator array. Each of the resonator arrays includes a pair of spaced resonator arrays sub-portions, with each of the sub-portions including a plurality of cells extending into a housing member, and have a bottom wall and an open outer wall communicating with the flow passage, with a plurality of orifices extending into each of the cells. The orifices have a smaller diameter than a hydraulic diameter of the cells.Type: ApplicationFiled: August 27, 2019Publication date: July 1, 2021Inventors: Ramons A. Reba, Duane C. McCormick, David M. Rockwell, Mark W. Wilson
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Patent number: 10941776Abstract: A compressor has a housing assembly having a plurality of ports including a suction port and a discharge A male rotor is mounted for rotation about an axis. A female rotor is enmeshed with the male rotor and mounted in the housing for rotation about an axis for drawing a flow from the suction port, compressing the flow, and discharging the compressed flow through the discharge port. A cavity group is between the discharge port and the male rotor and female rotor. The cavity group has a first member separating a plurality of cells and a foraminate cover member atop the first member.Type: GrantFiled: August 11, 2016Date of Patent: March 9, 2021Assignee: Carrier CorporationInventors: Ramons A. Reba, Arthur Blanc, Duane C. McCormick, Mark W. Wilson, David M. Rockwell, Benjamin J. Blechman
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Patent number: 10830239Abstract: A compressor (20) comprises: a housing assembly (22) having a plurality of ports including a suction port (24) and a discharge port (26); a male rotor (30) mounted for rotation about an axis (500); a female rotor (32) enmeshed with the male rotor and mounted in the housing for rotation about an axis (502) for drawing a flow from the suction port, compressing the flow, and discharging the compressed flow through the discharge port. The housing assembly comprises: a motor case (54); and a cover (60) bearing the suction port. The cover comprises a unitary piece forming: a mounting portion (63) mounted to an adjacent end (55) of the motor case, said adjacent end being large enough to pass the motor; and a fitting portion (62) extending to a rim (66) at the suction port and bearing an external groove (200).Type: GrantFiled: August 11, 2016Date of Patent: November 10, 2020Assignee: Carrier CorporationInventors: Scott M. MacBain, David M. Rockwell, Benjamin J. Blechman
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Patent number: 10808969Abstract: A compressor (22) has a male rotor (52), a female rotor (54), and a housing (50). The housing has a first bore (114) and a second bore (116) respectively accommodating portions of the male rotor and the female rotor. The housing has an inlet (26), an outlet (28), an economizer port (150) along at least one of the first bore and the second bore, and an external port (46) communicating with the economizer port. The housing has a chamber (152) between the economizer port and the external port having a volume of at least 0.8 liter.Type: GrantFiled: August 11, 2016Date of Patent: October 20, 2020Assignee: Carrier CorporationInventors: Amit Vaidya, David M. Rockwell, Peter J. Pileski
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Patent number: 10408508Abstract: A refrigerant system includes a compressor having a flow of compressor lubricant therein, the compressor compressing a flow of vapor refrigerant therethrough. An evaporator is operably connected to the compressor and includes an environment to be cooled via a thermal energy exchange with a liquid refrigerant in the evaporator. A vaporizer is receptive of a first flow of compressor lubricant and refrigerant mixture from the evaporator having a first concentration of lubricant. The vaporizer uses a flow of compressed refrigerant to separate refrigerant from the first flow. A lubricant sump is receptive of a second flow of compressor lubricant and refrigerant mixture from the vaporizer having a second concentration of lubricant greater than the first concentration. A heat exchanger is receptive of a third flow from the sump and uses evaporator suction gas to cool the third flow, thereby increasing its viscosity before urging the third flow to the compressor.Type: GrantFiled: June 11, 2014Date of Patent: September 10, 2019Assignee: CARRIER CORPORATIONInventors: Aaron M. Ronk, Nadine Thompson, David M. Rockwell
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Patent number: 10260783Abstract: In one aspect, a refrigeration system is provided. The refrigeration system includes a compressor coupled to a variable frequency drive (VFD), a condenser, an evaporator, an oil separator, and an oil conditioning circuit. The oil conditioning circuit is thermally coupled to the VFD and configured to heat oil from the oil separator with heat produced by the VFD.Type: GrantFiled: September 9, 2015Date of Patent: April 16, 2019Assignee: CARRIER CORPORATIONInventors: Scott M. MacBain, David M. Rockwell, Ulf J. Jonsson
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Publication number: 20180258936Abstract: A compressor (20; 600) comprising: a housing assembly (22) having a plurality of ports including a suction port (24) and a discharge port (26); a male rotor (30) mounted for rotation about an axis (500); a female rotor (32) enmeshed with the male rotor and mounted in the housing for rotation about an axis (502) for drawing a flow from the suction port, compressing the flow, and discharging the compressed flow through the discharge port; a cavity (120, 122; 620, 622, 624, 626) group (116, 118; 612, 614, 616, 618) between the discharge port and the male rotor and female rotor, the cavity group comprising: a first member (124, 80; 682, 680, 630, 632) separating a plurality of cells; a foraminate cover (130, 132; 640, 642, 644, 646) member atop the first member.Type: ApplicationFiled: August 11, 2016Publication date: September 13, 2018Applicant: Carrier CorporationInventors: Ramons A. Reba, Arthur Blanc, Duane C. McCormick, Mark W. Wilson, David M. Rockwell, Benjamin J. Blechman
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Publication number: 20180216619Abstract: A compressor (20) comprises: a housing assembly (22) having a plurality of ports including a suction port (24) and a discharge port (26); a male rotor (30) mounted for rotation about an axis (500); a female rotor (32) enmeshed with the male rotor and mounted in the housing for rotation about an axis (502) for drawing a flow from the e suction port, compressing the flow, and discharging the compressed flow through the discharge port. The housing assembly comprises: a motor case (54); and a cover (60) bearing the suction port. The cover comprises a unitary piece forming: a mounting portion (63) mounted to an adjacent end (55) of the motor case, said adjacent end being large enough to pass the motor; and a fitting portion (62) extending to a rim (66) at the suction port and bearing an external groove (200).Type: ApplicationFiled: August 11, 2016Publication date: August 2, 2018Applicant: Carrier CorporationInventors: Scott M. MacBain, David M. Rockwell, Benjamin J. Blechman
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Publication number: 20180156501Abstract: A compressor (22) has a male rotor (52), a female rotor (54), and a housing (50). The housing has a first bore (114) and a second bore (116) respectively accommodating portions of the male rotor and the female rotor. The housing has an inlet (26), an outlet (28), an economizer port (150) along at least one of the first bore and the second bore, and an external port (46) communicating with the economizer port. The housing has a chamber (152) between the economizer port and the external port having a volume of at least 0.8 liter.Type: ApplicationFiled: August 11, 2016Publication date: June 7, 2018Applicant: Carrier CorporationInventors: Amit Vaidya, David M. Rockwell, Peter J. Pileski
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Publication number: 20170248352Abstract: In one aspect, a refrigeration system is provided. The refrigeration system includes a compressor coupled to a variable frequency drive (VFD), a condenser, an evaporator, an oil separator, and an oil conditioning circuit. The oil conditioning circuit is thermally coupled to the VFD and configured to heat oil from the oil separator with heat produced by the VFD.Type: ApplicationFiled: September 9, 2015Publication date: August 31, 2017Inventors: Scott M. MacBain, David M. Rockwell, Ulf J. Jonsson