Patents by Inventor Mihir C. Desai
Mihir C. Desai 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).
-
Patent number: 8807974Abstract: A split discharge vane pump is disclosed having a pump body that includes an interior pumping chamber having a central axis and defining a continuous peripheral cam surface, the cam surface including four quadrantal cam segments, wherein diametrically opposed cam segments have identical cam profiles, and each cam segment defines an inlet arc, a discharge arc and two seal arcs. A rotor is mounted for axial rotation within the pumping chamber and a plurality of circumferentially spaced apart radially extending vanes are mounted for radial movement within the rotor, wherein the plurality of vanes define an equal number of circumferentially spaced apart buckets which extend between the rotor and the cam surface of the pumping chamber for carrying pressurized fluid.Type: GrantFiled: September 4, 2012Date of Patent: August 19, 2014Assignee: Triumph Engine Control Systems, LLCInventors: Paul J. Paluszewski, Mihir C. Desai, Xingen Dong
-
Publication number: 20130156564Abstract: A hydraulic vane pump includes a pump body defining an interior pumping chamber, an inlet port, and at least one discharge port. A cam ring is disposed within the interior pumping chamber and defines a continuous peripheral cam surface. A rotor is mounted for axial rotation within the interior pumping chamber. A plurality of vanes are mounted for radial movement within slots formed in the rotor. The pump includes axially opposed first and second wear disks disposed within the interior pumping chamber. The first wear disk is a floating wear disk and has an outer periphery which is positioned radially inward of the cam surface and is adapted and configured to slide axially with respect to the cam surface. The second wear disk is positioned adjacent to a second end surface of the rotor.Type: ApplicationFiled: December 16, 2011Publication date: June 20, 2013Inventors: Xingen Dong, Paul J. Paluszewski, Mihir C. Desai
-
Publication number: 20120328463Abstract: A split discharge vane pump is disclosed having a pump body that includes an interior pumping chamber having a central axis and defining a continuous peripheral cam surface, the cam surface including four quadrantal cam segments, wherein diametrically opposed cam segments have identical cam profiles, and each cam segment defines an inlet arc, a discharge arc and two seal arcs. A rotor is mounted for axial rotation within the pumping chamber and a plurality of circumferentially spaced apart radially extending vanes are mounted for radial movement within the rotor, wherein the plurality of vanes define an equal number of circumferentially spaced apart buckets which extend between the rotor and the cam surface of the pumping chamber for carrying pressurized fluid.Type: ApplicationFiled: September 4, 2012Publication date: December 27, 2012Applicant: Goodrich Pump & Engine Control Systems, Inc.Inventors: Paul J. Paluszewski, Mihir C. Desai, Xingen Dong
-
Patent number: 8277208Abstract: A split discharge vane pump is disclosed having a pump body that includes an interior pumping chamber having a central axis and defining a continuous peripheral cam surface, the cam surface including four quadrantal cam segments, wherein diametrically opposed cam segments have identical cam profiles, and each cam segment defines an inlet arc, a discharge arc and two seal arcs. A rotor is mounted for axial rotation within the pumping chamber and a plurality of circumferentially spaced apart radially extending vanes are mounted for radial movement within the rotor, wherein the plurality of vanes define an equal number of circumferentially spaced apart buckets which extend between the rotor and the cam surface of the pumping chamber for carrying pressurized fluid.Type: GrantFiled: June 11, 2009Date of Patent: October 2, 2012Assignee: Goodrich Pump & Engine Control Systems, Inc.Inventors: Paul J. Paluszewski, Mihir C. Desai, Xingen Dong
-
Publication number: 20100316507Abstract: A split discharge vane pump is disclosed having a pump body that includes an interior pumping chamber having a central axis and defining a continuous peripheral cam surface, the cam surface including four quadrantal cam segments, wherein diametrically opposed cam segments have identical cam profiles, and each cam segment defines an inlet arc, a discharge arc and two seal arcs. A rotor is mounted for axial rotation within the pumping chamber and a plurality of circumferentially spaced apart radially extending vanes are mounted for radial movement within the rotor, wherein the plurality of vanes define an equal number of circumferentially spaced apart buckets which extend between the rotor and the cam surface of the pumping chamber for carrying pressurized fluid.Type: ApplicationFiled: June 11, 2009Publication date: December 16, 2010Applicant: Goodrich Pump & Engine Control Systems, Inc.Inventors: Paul J. Paluszewski, Mihir C. Desai, Xingen Dong
-
Patent number: 7770388Abstract: A two-stage system for delivering fuel to a gas turbine including a first stage variable pump for serving as a primary source of fuel, a second stage fixed pump for selectively supplementing the variable pump, a bypass valve connected to the fixed pump for loading and unloading the fixed pump and a regulator valve assembly connected to the variable pump and the bypass valve for controlling operation of the variable pump and the bypass valve. Preferably, the two-stage system also includes a control valve connected to the regulator valve assembly for setting a pressure differential across the regulator valve assembly and, thereby, loading and unloading the fixed pump.Type: GrantFiled: November 15, 2005Date of Patent: August 10, 2010Assignee: Goodrich Pump & Engine Control Systems, Inc.Inventor: Mihir C. Desai
-
Publication number: 20080289338Abstract: A two-stage system for delivering fuel to a gas turbine including a first stage variable pump for serving as a primary source of fuel, a second stage fixed pump for selectively supplementing the variable pump, a bypass valve connected to the fixed pump for loading and unloading the fixed pump and a regulator valve assembly connected to the variable pump and the bypass valve for controlling operation of the variable pump and the bypass valve. Preferably, the two-stage system also includes a control valve connected to the regulator valve assembly for setting a pressure differential across the regulator valve assembly and, thereby, loading and unloading the fixed pump.Type: ApplicationFiled: November 15, 2005Publication date: November 27, 2008Applicant: GOODRICH PUMP & ENGINE CONTROL SYSTEMS, INC.Inventor: Mihir C. Desai
-
Patent number: 7058556Abstract: An adaptive aero-thermodynamic engine model is disclosed which incorporates a plurality of model engine operating parameters, a plurality of nominal component efficiencies and corresponding efficiency modifier functions. The engine model is adapted by measuring a plurality of engine operating parameters corresponding to the plurality of model engine operating parameters during steady state operation of the engine over a plurality of data points, matching each of the model engine operating parameters to respective measured engine operating parameters by iteratively adapting each of the nominal component efficiencies using the corresponding efficiency modifier functions, estimating actual component efficiencies based upon the adapted nominal component efficiencies, and inputting the estimated actual component efficiencies into the engine model.Type: GrantFiled: September 26, 2001Date of Patent: June 6, 2006Assignees: Goodrich Pump & Engine Control Systems, Inc., Pratt & Whitney Canada Corp.Inventors: Mihir C. Desai, Cristina Crainic
-
Patent number: 6986641Abstract: A power turbine speed control system for a helicopter is disclosed which includes components for generating a power turbine speed signal based upon a demanded rotor speed, a high-order filter for filtering the power turbine speed signal by effectuating a rapid attenuation of main and tail rotor torsional frequencies in the power turbine speed signal without compromising phase at low frequencies, and a governor for providing isochronous power turbine speed and rotor speed control based upon the filtered power turbine speed signal.Type: GrantFiled: July 7, 2003Date of Patent: January 17, 2006Assignee: Goodrich Pump & Engine Control Systems, Inc.Inventors: Mihir C. Desai, Tomasz J. Stanecki, Jeffrey S. Mattice
-
Patent number: 6729139Abstract: A power turbine speed control system for a helicopter is disclosed which includes components for generating a power turbine speed signal based upon a demanded rotor speed, a high-order filter for filtering the power turbine speed signal by effectuating a rapid attenuation of main and tail rotor torsional frequencies in the power turbine speed signal without compromising phase at low frequencies, and a governor for providing isochronous power turbine speed and rotor speed control based upon the filtered power turbine speed signal.Type: GrantFiled: September 26, 2001Date of Patent: May 4, 2004Assignee: Goodrich Pump & Engine Control Systems, Inc.Inventors: Mihir C. Desai, Tomasz J. Stanecki, Jeffrey S. Mattice
-
Publication number: 20030094001Abstract: A power turbine speed control system for a helicopter is disclosed which includes components for generating a power turbine speed signal based upon a demanded rotor speed, a high-order filter for filtering the power turbine speed signal by effectuating a rapid attenuation of main and tail rotor torsional frequencies in the power turbine speed signal without compromising phase at low frequencies, and a governor for providing isochronous power turbine speed and rotor speed control based upon the filtered power turbine speed signal.Type: ApplicationFiled: September 26, 2001Publication date: May 22, 2003Inventors: Mihir C. Desai, Tomasz J. Stanecki, Jeffrey S. Mattice
-
Publication number: 20030074171Abstract: An adaptive aero-thermodynamic engine model is disclosed which incorporates a plurality of model engine operating parameters, a plurality of nominal component efficiencies and corresponding efficiency modifier functions. The engine model is adapted by measuring a plurality of engine operating parameters corresponding to the plurality of model engine operating parameters during steady state operation of the engine over a plurality of data points, matching each of the model engine operating parameters to respective measured engine operating parameters by iteratively adapting each of the nominal component efficiencies using the corresponding efficiency modifier functions, estimating actual component efficiencies based upon the adapted nominal component efficiencies, and inputting the estimated actual component efficiencies into the engine model.Type: ApplicationFiled: September 26, 2001Publication date: April 17, 2003Inventors: Mihir C. Desai, Cristina Crainic
-
Patent number: 6241392Abstract: A bearing for supporting a rotating shaft receiving a transverse load, wherein the bearing supports the shaft along a load line and wherein the bearing is closest to the rotating shaft at a running line. The bearing includes a circumferential inner surface, and a lubricant bay defined in the inner surface. The lubricant bay is axially and circumferentially offset from the load line such that a resulting pressure pad of lubricant within the bay provides a hydrostatic force that forces the running line to a location substantially perpendicular to the load line. Load capabilities of a bearing according to the present disclosure, therefore, are substantially insensitive to shaft bending and do not deteriorate in response to the shaft bending.Type: GrantFiled: January 21, 2000Date of Patent: June 5, 2001Assignee: Coltec Industries IncInventors: Mihir C. Desai, Raymond D. Zagranski
-
Patent number: 5863189Abstract: Variable-displacement, single-acting vane pumps in which the cylindrical cam member is adjustably supported within an outer annular cam housing to enable the cam member to be adjustably-rotated relative to the housing to adjust the geometric center of the cam chamber relative to the center of the rotor member and thereby adjust the displacement capacity of the pump between zero-flow maximum flow values. The annular housing for the cam member comprises a roller bearing assembly between its inner race surface and the cylindrical outer surface of the cam member, which minimizes the friction when the cam member is rotated during adjustment and enables the adjustment to be actuated remotely, such as by means of a small motor gear assembly.Type: GrantFiled: July 10, 1995Date of Patent: January 26, 1999Assignee: Coltec Industries IncInventors: Jack G. Sundberg, Mihir C. Desai, Raymond D. Zagranski
-
Patent number: 5716201Abstract: A variable displacement vane pump having a vaned rotor adjustably contained within a cam member for rotation between fuel inlet and fuel discharge arcs. Adjacent vanes form enclosed fuel bucket areas which are expanded and axially-supplied with fuel in the fuel inlet arc and are contracted and axially-discharge the fuel in the fuel discharge arc. Fuel circulation is improved by providing a central recess at each vane tip and/or a central groove in the cam surface to prevent trapping, stagnation and overheating of fuel at the centerpoints of the bucket areas, which overheating can result in expansion of the vane tips, scoring of the cam surface and pump failure.Type: GrantFiled: July 31, 1995Date of Patent: February 10, 1998Assignee: Coltec Industries Inc.Inventors: Robert Peck, Martin Thomas Books, Francis Tokarski, Bernard J. Bisson, Raymond D. Zagranski, Mihir C. Desai
-
Patent number: 5545014Abstract: A durable, single action, variable displacement vane pump capable of undervane pumping, components thereof, and pressure balancing method. The pump comprises a cylindrical barstock rotor member having large diameter journal ends and central vane slots uniformly spaced therearound. The vane slots are elongate and have a central vane-supporting portion of maximum depth surrounded at each end by extension portions having depths which decrease axially to the surface of rotor member. The vaned rotor is rotatably supported within a unitary cam member having opposed faces and a circular bore therethrough forming a cam chamber having a continuous interior circular cam surface. The vane slot extensions in the rotor project outwardly beyond the cam chamber.Type: GrantFiled: August 30, 1993Date of Patent: August 13, 1996Assignee: Coltec Industries Inc.Inventors: Jack G. Sundberg, Bernard J. Bisson, Mihir C. Desai, Martin T. Books