Patents by Inventor Virender Jain
Virender Jain 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: 7462976Abstract: A smart material actuator wherein one or more smart material devices are constrained in a frame such that expansion or contraction of the frame effects movement of side frame members away from or towards one another. The side frame members are constrained such that such movement away from or towards one another effects rotational movement of the frame for outputting amplified movement at an output member that rotates with the frame.Type: GrantFiled: January 3, 2007Date of Patent: December 9, 2008Assignee: Parker-Hannifin CorporationInventors: Daniel O. Semmere, Robert W. Ragen, Jr., Virender Jain, Daniel C. Massie
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Publication number: 20070247024Abstract: A smart material actuator wherein one or more smart material devices are constrained in a frame such that expansion or contraction of the frame effects movement of side frame members away from or towards one another. The side frame members are constrained such that such movement away from or towards one another effects rotational movement of the frame for outputting amplified movement at an output member that rotates with the frame.Type: ApplicationFiled: January 3, 2007Publication date: October 25, 2007Applicant: PARKER-HANNIFIN CORPORATIONInventors: Daniel Semmere, Robert Ragen, Virender Jain, Daniel Massie
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Patent number: 6460354Abstract: Apparatus for detecting low charge of a working fluid in a heat transfer system of the type having a fluid circuit comprising a compressor for pressurizing working fluid received from an evaporator, a condenser and condenser fan for cooling the working fluid received from the compressor, and an expansion device for controlling flow of the working fluid between the condenser and the evaporator, the apparatus comprising: a working fluid state sensor operative in response to a control signal and disposed in the fluid circuit on the outlet side of the evaporator to produce a working fluid state signal; and a control circuit for providing the control signal to the sensor and for controlling operation of the heat transfer system based on a comparison of the working fluid state signal with a state set point; the control circuit detecting a low charge condition of the working fluid when the state signal indicates the working fluid superheat exceeds a first predetermined threshold over a first predetermined time withType: GrantFiled: March 2, 2001Date of Patent: October 8, 2002Assignee: Parker-Hannifin CorporationInventors: Roy M. Yabuki, Derek Y. Kamemoto, Virender Jain, Richard L. Kenyon
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Publication number: 20020121100Abstract: Apparatus for detecting low charge of a working fluid in a heat transfer system of the type having a fluid circuit comprising a compressor for pressurizing working fluid received from an evaporator, a condenser and condenser fan for cooling the working fluid received from the compressor, and an expansion device for controlling flow of the working fluid between the condenser and the evaporator, the apparatus comprising: a working fluid state sensor operative in response to a control signal and disposed in the fluid circuit on the outlet side of the evaporator to produce a working fluid state signal; and a control circuit for providing the control signal to the sensor and for controlling operation of the heat transfer system based on a comparison of the working fluid state signal with a state set point; the control circuit detecting a low charge condition of the working fluid when the state signal indicates the working fluid superheat exceeds a first predetermined threshold over a first predetermined time withType: ApplicationFiled: March 2, 2001Publication date: September 5, 2002Inventors: Roy M. Yabuki, Derek Y. Kamemoto, Virender Jain, Richard L. Kenyon
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Patent number: 5877476Abstract: Apparatus for detecting working fluid state in a heat transfer system of the type having an evaporator and an expansion valve for controlling mass flow of the working fluid to the evaporator, comprises a first sensor disposed in the working fluid on the outlet side of the evaporator; the first sensor producing a first signal related to the working fluid state; a second sensor disposed in the working fluid on the inlet side of the evaporator; the second sensor producing a second signal related to a pressure dependent characteristic of the working fluid; and a control circuit for receiving the first and second signals and determining the working fluid state based on a ratio of the first and second signals.Type: GrantFiled: September 30, 1996Date of Patent: March 2, 1999Assignee: Parker-Hannifin Corp.Inventors: Roy M. Yabuki, Virender Jain, Richard L. Kenyon, Michael Nolan
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Patent number: 5660052Abstract: A heat transfer system includes a high side pressure sensor in the form of a temperature dependent resistance in heat exchange with the system working fluid to locally heat the fluid in response to a control signal. Control means are provided for applying the control signal to the resistance and detecting a minimum thermal resistance between the thermistor and the working fluid.Type: GrantFiled: June 2, 1995Date of Patent: August 26, 1997Assignee: Parker-Hannifin CorporationInventors: Richard L. Kenyon, Roy M. Yabuki, Chester D. Campbell, Sandra L. Harper, Michael Nolan, Virender Jain, Alan Matthies
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Patent number: 5522231Abstract: A mass flow control apparatus and method for use in combination with a heat transfer system having a compressor, condenser, expansion valve, evaporator and working fluid in a fluid circuit. The mass flow is controlled using a quality sensor for the working fluid exiting the evaporator, and a high side pressure sensor. A control circuit is provided that monitors the quality sensor and the high side pressure sensor, and controls operation of the compressor, condenser fan and valve in response thereto. A flow reduction mode is used to reduce high side pressure at the valve inlet without excessive compressor cycling by changing the quality sensor set point when the high side pressure exceeds the condenser fan turn-on pressure but is less than the compressor disengage pressure.Type: GrantFiled: July 26, 1995Date of Patent: June 4, 1996Assignee: Parker-Hannifin CorporationInventors: Richard L. Kenyon, Roy M. Yabuki, Chester D. Campbell, Sandra L. Harper, Michael Nolan, Virender Jain, Alan Matthies
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Patent number: 5477701Abstract: A mass flow control apparatus and method for use in combination with a heat transfer system having a compressor, condenser, expansion valve, evaporator and working fluid in a fluid circuit. The mass flow is controlled using a quality sensor for the working fluid exiting the evaporator, and a high side pressure sensor. A control circuit is provided that monitors the quality sensor and the high side pressure sensor, and controls operation of the compressor, condenser fan and valve in response thereto. A flow reduction mode is used to reduce high side pressure at the valve inlet without excessive compressor cycling by changing the quality sensor set point when the high side pressure exceeds the condenser fan turn-on pressure but is less than the compressor disengage pressure.Type: GrantFiled: May 3, 1995Date of Patent: December 26, 1995Assignee: Parker-Hannifin CorporationInventors: Richard L. Kenyon, Roy M. Yabuki, Chester D. Campbell, Sandra L. Harper, Michael Nolan, Virender Jain, Alan Matthies
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Patent number: 5460349Abstract: An expansion valve (10) for heat transfer systems such as an air conditioning system, includes a control element (20) for controlling the flow rate of working fluid through the valve. The control element has a stem member (28) and movable member (42) movable on the stem member. Openings (38) to an internal passage (30) in the stem member are regulated by positioning the movable member to achieve regulated flow rate of refrigerant material through the valve. The movable member of the control element is moved by a plunger (24) of a proportional solenoid (22). The proportional solenoid has a magnetic flux circuit including a low permeance isolation tube (62) surrounding the plunger, which enables removal of the coil (76) and frame (78) of the solenoid from the valve. The solenoid further includes a variable permeance flux washer (69) the flux through which varies with plunger position, which is disposed from a gap (82) which provides an area of magnetic saturation.Type: GrantFiled: November 18, 1993Date of Patent: October 24, 1995Assignee: Parker-Hannifin CorporationInventors: Chester D. Campbell, Sandra L. Harper, Virender Jain, Richard L. Kenyon, Alan Matthies, Roger G. Riefler, Roy M. Yabuki, Ashok Zopey
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Patent number: 5390897Abstract: An expansion valve (10) for heat transfer systems such as an air conditioning system, includes a control element (20) for controlling the flow rate of working fluid through the valve. The control element has a stem member (28) and movable member (42) movable on the stem member. Openings (38) to an internal passage (30) in the stem member are regulated by positioning the movable member to achieve regulated flow rate of refrigerant material through the valve. The movable member of the control element is moved by a plunger (24) of a proportional solenoid (22). The proportional solenoid has a magnetic flux circuit including a low permeance isolation tube (62) surrounding the plunger, which enables removal of the coil (76) and frame (78) of the solenoid from the valve. The solenoid further includes a variable permeance flux washer (69) the flux through which varies with plunger position, which is disposed from a gap (82) which provides an area of magnetic saturation.Type: GrantFiled: December 3, 1993Date of Patent: February 21, 1995Assignee: Parker Hannifin CorporationInventors: Chester D. Campbell, Sandra L. Harper, Virender Jain, Richard L. Kenyon, Alan Matthies, Roger G. Riefler, Roy M. Yabuki, Ashok Zopey
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Patent number: 5335513Abstract: A heat transfer system includes a high side pressure sensor in the form of a temperature dependent resistance in heat exchange with the system working fluid to locally heat the fluid in response to a control signal. Control means are provided for applying the control signal to the resistance and detecting a minimum thermal resistance between the thermistor and the working fluid.Type: GrantFiled: January 19, 1993Date of Patent: August 9, 1994Assignee: Parker-Hannifin CorporationInventors: Chester D. Campbell, Sandra L. Harper, Virender Jain, Richard L. Kenyon, Alan Matthies, Roy M. Yabuki
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Patent number: 5295656Abstract: An expansion valve (10) for heat transfer systems such as an air conditioning system, includes a control element (20) for controlling the flow rate of working fluid through the valve. The control element has a stem member (28) and movable member (42) movable on the stem member. Openings (38) to an internal passage (30) in the stem member are regulated by positioning the movable member to achieve regulated flow rate of refrigerant material through the valve. The movable member of the control element is moved by a plunger (24) of a proportional solenoid (22). The proportional solenoid has a magnetic flux circuit including a low permeance isolation tube (62) surrounding the plunger, which enables removal of the coil (76) and frame (78) of the solenoid from the valve. The solenoid further includes a variable permeance flux washer (69) the flux through which varies with plunger position, which is disposed from a gap (82) which provides an area of magnetic saturation.Type: GrantFiled: October 15, 1992Date of Patent: March 22, 1994Assignee: Parker Hannifin CorporationInventors: Chester D. Campbell, Sandra L. Harper, Virender Jain, Richard L. Kenyon, Alan Matthies, Roger G. Riefler, Roy M. Yabuki, Ashok Zopey