Patents by Inventor Thomas J. Davern
Thomas J. Davern 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: 11655905Abstract: A multi-port valve is provided. The multi-port valve includes a housing which defines an internal cavity. The housing further includes a plurality of ports. Each of the plurality of ports is in communication with the internal cavity. A shell body is rotatably disposed within the internal cavity. A seal member is also provided which has a plurality of openings and surrounds the shell body such that it circumscribes the shell body within the internal cavity.Type: GrantFiled: April 4, 2018Date of Patent: May 23, 2023Assignee: Robertshaw Controls CompanyInventors: Joe Ledvora, Philip C. Hawken, Thomas J. Davern
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Patent number: 11655906Abstract: Embodiments of a multi-port multi-plane valve are provided. The multi-port multi-plane valve includes a housing which defines an internal cavity. The housing further includes a plurality of ports in which each port lies within one of two planes that are normal to each other. Each of the plurality of ports is in communication with the internal cavity. A shell body is rotatably disposed within the internal cavity and provides selectable fluid communications between the ports. A seal member is also provided which has a plurality of openings and surrounds the shell body. At least one flow enhancer channel may be included to reduce the pressure drop occurring on one side of the valve when controlling flow paths on the other side of the valve.Type: GrantFiled: September 27, 2021Date of Patent: May 23, 2023Assignee: Robertshaw Controls CompanyInventors: Joseph Ledvora, Thomas J. Davern, James E. Pearson
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Patent number: 11359854Abstract: An air damper is provided. The air damper includes a base plate having a plurality of plate openings defining an area for the passage of air through the air damper. The slide is slideable over the base plate. The air damper also includes a slide having a plurality of slide openings and a plurality of slide closures. The air damper further includes a stepper motor coupled to the slide to move the slide in linear steps to change the area for the passage of air.Type: GrantFiled: June 27, 2019Date of Patent: June 14, 2022Assignee: Robertshaw Controls CompanyInventors: Kyle William Svejcar, Thomas J. Davern
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Patent number: 11255450Abstract: Embodiments of a multi-port multi-plane valve are provided. The multi-port multi-plane valve includes a housing which defines an internal cavity. The housing further includes a plurality of ports in which each port lies within one of two planes that are normal to each other. Each of the plurality of ports is in communication with the internal cavity. A shell body is rotatably disposed within the internal cavity and provides selectable fluid communications between the ports. A seal member is also provided which has a plurality of openings and surrounds the shell body. At least one flow enhancer channel may be included to reduce the pressure drop occurring on one side of the valve when controlling flow paths on the other side of the valve.Type: GrantFiled: December 18, 2019Date of Patent: February 22, 2022Assignee: Robertshaw Controls CompanyInventors: Joseph Ledvora, Thomas J. Davern, James E. Pearson
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Publication number: 20220010884Abstract: Embodiments of a multi-port multi-plane valve are provided. The multi-port multi-plane valve includes a housing which defines an internal cavity. The housing further includes a plurality of ports in which each port lies within one of two planes that are normal to each other. Each of the plurality of ports is in communication with the internal cavity. A shell body is rotatably disposed within the internal cavity and provides selectable fluid communications between the ports. A seal member is also provided which has a plurality of openings and surrounds the shell body. At least one flow enhancer channel may be included to reduce the pressure drop occurring on one side of the valve when controlling flow paths on the other side of the valve.Type: ApplicationFiled: September 27, 2021Publication date: January 13, 2022Applicant: Robertshaw Controls CompanyInventors: Joseph Ledvora, Thomas J. Davern, James E. Pearson
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Patent number: 11156300Abstract: A multi-port valve having a partial circumferential seal is provided. The valve includes a shell body and a seal member contained within a housing. The seal member is constructed such that it does not completely circumscribe the shell body.Type: GrantFiled: October 30, 2019Date of Patent: October 26, 2021Assignee: Robertshaw Controls CompanyInventors: Andrzej Bunda, Thomas J. Davern
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Publication number: 20210131575Abstract: A multi-port valve having a partial circumferential seal is provided. The valve includes a shell body and a seal member contained within a housing. The seal member is constructed such that it does not completely circumscribe the shell body.Type: ApplicationFiled: October 30, 2019Publication date: May 6, 2021Inventors: Andrzej Bunda, Thomas J. Davern
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Publication number: 20200408455Abstract: An air damper is provided. The air damper includes a base plate having a plurality of plate openings defining an area for the passage of air through the air damper. The slide is slideable over the base plate. The air damper also includes a slide having a plurality of slide openings and a plurality of slide closures. The air damper further includes a stepper motor coupled to the slide to move the slide in linear steps to change the area for the passage of air.Type: ApplicationFiled: June 27, 2019Publication date: December 31, 2020Applicant: Robertshaw Controls CompanyInventors: Kyle William Svejcar, Thomas J. Davern
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Publication number: 20200200284Abstract: Embodiments of a multi-port multi-plane valve are provided. The multi-port multi-plane valve includes a housing which defines an internal cavity. The housing further includes a plurality of ports in which each port lies within one of two planes that are normal to each other. Each of the plurality of ports is in communication with the internal cavity. A shell body is rotatably disposed within the internal cavity and provides selectable fluid communications between the ports. A seal member is also provided which has a plurality of openings and surrounds the shell body. At least one flow enhancer channel may be included to reduce the pressure drop occurring on one side of the valve when controlling flow paths on the other side of the valve.Type: ApplicationFiled: December 18, 2019Publication date: June 25, 2020Applicant: Robertshaw Controls CompanyInventors: Joseph Ledvora, Thomas J. Davern, James E. Pearson
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Publication number: 20200173569Abstract: A multi-port valve is provided. The multi-port valve includes a housing which defines an internal cavity. The housing further includes a plurality of ports. Each of the plurality of ports is in communication with the internal cavity. A valve member is rotatably disposed within the internal cavity. A seal member is also provided between the internal cavity and at least one of the ports. A check valve assembly is also provided in fluid communication with at least one of the ports to provide an additional checked flow therefrom or a checked flow therethrough. Temperature, pressure, and/or flow sensors may also be provided.Type: ApplicationFiled: November 14, 2019Publication date: June 4, 2020Applicant: Robertshaw Controls CompanyInventors: Michael J. Koch, Thomas J. Davern, James E. Pearson
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Publication number: 20180292016Abstract: A multi-port valve is provided. The multi-port valve includes a housing which defines an internal cavity. The housing further includes a plurality of ports. Each of the plurality of ports is in communication with the internal cavity. A shell body is rotatably disposed within the internal cavity. A seal member is also provided which has a plurality of openings and surrounds the shell body such that it circumscribes the shell body within the internal cavity.Type: ApplicationFiled: April 4, 2018Publication date: October 11, 2018Applicant: Robertshaw Controls CompanyInventors: Joe Ledvora, Philip C. Hawken, Thomas J. Davern
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Patent number: 7649148Abstract: A motor driven appliance timer utilizing a cam program disk and snap action switches is provided. The motor may be externally energized, or may be energized based on integrated electronics within the appliance timer. Rotation of the program disk by a user to allow selection of a desired appliance cycle is accommodated by a clutch subassembly that allows bidirectional rotation of the program disk without requiring that the user pull or push the control shaft before rotating the program disk. The timer of the present invention may utilize either impulse or constant drive mechanisms to rotate the program disk. The use of snap action switches minimizes the possibility of tack weld failures due to switch teasing.Type: GrantFiled: January 21, 2005Date of Patent: January 19, 2010Assignee: Robertshaw Controls CompanyInventors: James E. Pearson, Robert J. Van der Linde, Thomas J. Davern
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Patent number: 7454918Abstract: A system and method for refrigeration timer control having an energy efficient defrost cycle are provided. The system and method provide a delay time after the refrigeration cycle and prior to the defrost cycle. During this delay period the evaporator fan may run. The fan circulation and the heat from the fan coil provide a pre-warm cycle to the evaporator prior to the defrost cycle. To further enhance energy efficiency, the system and method may also provide a pre-refrigeration cycle after the defrost cycle. During this pre-refrigeration cycle only the compressor is energized. This prevents warm moist air from being circulated until the evaporator coils are cooled.Type: GrantFiled: March 30, 2005Date of Patent: November 25, 2008Assignee: Robertshaw Controls CompanyInventors: Thomas J. Davern, Jack Devine, William B. Bennett
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Patent number: 7174734Abstract: A damper in a refrigeration system having a first compartment and a second compartment connectable through a passageway is provided. The damper comprises a damper door, a temperature responsive unit, and a heating element. The damper door is moveable between an open position and a closed position. The temperature responsive unit is operatively coupled to the damper door. The heating element is coupled to one end of the temperature responsive unit to conductively heat the temperature responsive unit when activated. The temperature responsive unit expands to move the damper door to the open position in response to conductive heating from the heating element.Type: GrantFiled: November 29, 2005Date of Patent: February 13, 2007Assignee: Robertshaw Controls CompanyInventors: Thomas J. Davern, James E. Pearson, Paul H. Tuma
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Patent number: 7140593Abstract: A damper assembly that produces bi-directional damper door movement from a single-direction motor is provided. Bi-directional rotation of the damper door is enabled by a cam slot on an end of the damper door that is engaged by a motor-driven drive cam having a drive pin extending into the cam slot. As the single-direction motor collectively rotates the drive cam and the drive pin, the drive pin reciprocates within the cam slot. This causes sealing flanges and the damper from the damper door to alternatively engage under a positive pressure and disengage from one another as the damper door is rotated bi-directionally.Type: GrantFiled: March 31, 2005Date of Patent: November 28, 2006Assignee: Robertshaw Controls CompanyInventors: James E. Pearson, Robert J. Van der Linde, Thomas J. Davern
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Patent number: 6880359Abstract: A flow-through rotary damper assembly providing highly efficient, essentially laminar fluid flow therethrough is provided. The rotary damper assembly includes a cylindrical outer body and a cylindrical inner body that are rotatable in relation to one another. The outer body defines apertures in relation to one another to allow fluid flow without requiring fluid direction change. The inner body defines a flow passage having inlet and outlet apertures that may be aligned with the apertures of the outer body to allow fluid flow therethrough, or may be rotated out of alignment to block fluid flow. The outer body includes an aperture on one end to allow fluid flow to a third compartment. The inner body also includes an end aperture that may be aligned therewith. The damper provides selectable fluid flow between each of the compartments depending on the relative position of the cylindrical inner body member.Type: GrantFiled: July 15, 2003Date of Patent: April 19, 2005Assignee: Robertshaw Controls CompanyInventors: James E. Pearson, Thomas J. Davern, Paul H. Tuma
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Patent number: D705103Type: GrantFiled: November 30, 2012Date of Patent: May 20, 2014Assignee: Thermo King CorporationInventors: Mark Daniel Leasure, Matthew Jay Srnec, Carl James Breczinski, Russell Lee Sanders, R. Allan McLane, Thomas J. Davern
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Patent number: D761743Type: GrantFiled: August 19, 2014Date of Patent: July 19, 2016Assignee: Robertshaw Controls CompanyInventors: Kevin J. Engler, James E. Pearson, Thomas J. Davern
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Patent number: D790485Type: GrantFiled: February 17, 2016Date of Patent: June 27, 2017Assignee: Robertshaw Controls CompanyInventors: Kevin J. Engler, James E. Pearson, Thomas J. Davern