Patents by Inventor Weishun Ni

Weishun Ni 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).

  • Publication number: 20190331176
    Abstract: A clutch assembly includes an output shaft extending along an axis and output teeth. A movable component is disposed adjacent to the output component. The movable component includes drive teeth and an annular engagement weight track including a groove circumscribing the axis. The movable component is movable between an engaged position, wherein the drive teeth are drivingly engaged with the output teeth, and a disengaged position, wherein the drive teeth are not engaged with the output teeth. An input component is disposed adjacent to the movable component. The input component includes engagement weight pockets. Spherical engagement weights are disposed in each engagement weight pocket. The groove has a generally uniform radial cross section across its circumference.
    Type: Application
    Filed: April 26, 2018
    Publication date: October 31, 2019
    Inventors: Erik D. LeBeau, Weishun Ni
  • Patent number: 10260501
    Abstract: A bearing structure for abutting a pair of gears of a gear pump includes a body including a face on which the gears rotate, an inlet defined in the body, and an outlet defined in the body. The bearing structure includes a sealing portion of the face configured to fluidly seal the inlet from the outlet, the sealing portion being defined as a portion of the face in sealing engagement with the gears at a rotational position of the gears wherein a volume contained by teeth of the gears and the face is constant or about constant as the gears rotate.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: April 16, 2019
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Ryan Shook, Weishun Ni, Joseph Wetch
  • Patent number: 10047606
    Abstract: A vane pump is disclosed that includes a plurality of vanes and radial slots configured to provide a gap between the vane and the radial slot such that the vane has a different angular position relative to the direction of rotation in a radially extended position compared to an angular position in a radially-retracted position. The different angular positions provide different orientation of the arcuate surface of the vane tip portion with respect to the cam body inner surface, thus providing different fluid stop points on the vane tip portion arcuate surface.
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: August 14, 2018
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Joseph Wetch, Weishun Ni, Edward W. Goy
  • Publication number: 20180051696
    Abstract: A bearing structure for abutting a pair of gears of a gear pump includes a body including a face on which the gears rotate, an inlet defined in the body, and an outlet defined in the body. The bearing structure includes a sealing portion of the face configured to fluidly seal the inlet from the outlet, the sealing portion being defined as a portion of the face in sealing engagement with the gears at a rotational position of the gears wherein a volume contained by teeth of the gears and the face is constant or about constant as the gears rotate.
    Type: Application
    Filed: August 16, 2016
    Publication date: February 22, 2018
    Inventors: Ryan Shook, Weishun Ni, Joseph Wetch
  • Patent number: 9677559
    Abstract: A bearing includes a bridge land geometry having a finger cut that defines a width ISW, a center of the width ISW displaced from a shaft axis a radial distance ISR, a ratio of ISW/ISR between 0.074-0.293, to reduce cavitation and pressure ripple.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: June 13, 2017
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Weishun Ni, Satish Shantilal Shah, Timothy P. Walgren
  • Publication number: 20170022813
    Abstract: A vane pump is disclosed that includes a plurality of vanes and radial slots configured to provide a gap between the vane and the radial slot such that the vane has a different angular position relative to the direction of rotation in a radially extended position compared to an angular position in a radially-retracted position. The different angular positions provide different orientation of the arcuate surface of the vane tip portion with respect to the cam body inner surface, thus providing different fluid stop points on the vane tip portion arcuate surface.
    Type: Application
    Filed: July 21, 2015
    Publication date: January 26, 2017
    Inventors: Joseph Wetch, Weishun Ni, Edward W. Goy
  • Patent number: 9068568
    Abstract: A gear pump comprises first and second gears and a housing. The housing comprises a first arcuate gear bore that receives the first gear, a second arcuate gear bore that receives the second gear, a discharge port that joins the first and second arcuate gear bores, an inlet port that joins the first and second arcuate gear bores opposite the discharge port; and first and second cutbacks that are joined to the first and second arcuate gear bores, respectively, adjacent the inlet port.
    Type: Grant
    Filed: July 23, 2012
    Date of Patent: June 30, 2015
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Steven A. Heitz, Weishun Ni
  • Patent number: 9057372
    Abstract: A gear includes a gear root defined by a stretched root blended into an involute tooth profile curve within a True Involute Form diameter.
    Type: Grant
    Filed: December 6, 2010
    Date of Patent: June 16, 2015
    Assignee: Hamilton Sundstrand Corporation
    Inventors: David L. Wakefield, Weishun Ni
  • Patent number: 8944793
    Abstract: An aircraft turbine engine Fuel Metering Unit (FMU) is provided including a main gear pump having a main drive gear and a main driven gear and a servo gear pump having a servo drive gear and a servo driven gear. The main drive gear and the servo drive gear are received on an input shaft. The main driven gear is mounted to a first shaft oriented parallel to and adjacent a first side of the input shaft. The main driven gear is in meshing engagement with the main drive gear. The servo drive gear is mounted to a second shaft arranged parallel to and adjacent a second, opposite side of the input shaft. The servo driven gear is in meshing engagement with the servo drive gear.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: February 3, 2015
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Weishun Ni
  • Patent number: 8678747
    Abstract: A brake assembly (44) for an air turbine starter (10) includes a brake cylinder (46) located in the air turbine starter (10). A brake piston (48) is located at least partially within the brake cylinder (46) and slidable therein. A biasing member (50) biases the brake piston (48) toward a turbine wheel (12) of the air turbine starter (10) applying a braking force to the turbine wheel (12) and defining a piston chamber (58) between the turbine wheel (12) and the brake piston (48). A through opening (56) in the brake piston (48) into the piston chamber (58) is configured such that a flow of fluid through the through opening (56) into the piston chamber (58) applies a force to the brake piston (48) sufficient to overcome the bias thereby allowing rotation of the turbine wheel (12).
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: March 25, 2014
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Weishun Ni, Jeffrey A. Stadler, Jody A. Peterson
  • Publication number: 20140023545
    Abstract: A gear pump comprises first and second gears and a housing. The housing comprises a first arcuate gear bore that receives the first gear, a second arcuate gear bore that receives the second gear, a discharge port that joins the first and second arcuate gear bores, an inlet port that joins the first and second arcuate gear bores opposite the discharge port; and first and second cutbacks that are joined to the first and second arcuate gear bores, respectively, adjacent the inlet port.
    Type: Application
    Filed: July 23, 2012
    Publication date: January 23, 2014
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Steven A. Heitz, Weishun Ni
  • Publication number: 20130319153
    Abstract: An aircraft turbine engine Fuel Metering Unit (FMU) is provided including a main gear pump having a main drive gear and a main driven gear and a servo gear pump having a servo drive gear and a servo driven gear. The main drive gear and the servo drive gear are received on an input shaft. The main driven gear is mounted to a first shaft oriented parallel to and adjacent a first side of the input shaft. The main driven gear is in meshing engagement with the main drive gear. The servo drive gear is mounted to a second shaft arranged parallel to and adjacent a second, opposite side of the input shaft. The servo driven gear is in meshing engagement with the servo drive gear.
    Type: Application
    Filed: September 13, 2012
    Publication date: December 5, 2013
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventor: Weishun Ni
  • Publication number: 20120219449
    Abstract: A bearing includes a bridge land geometry having a finger cut that defines a width ISW, a center of the width ISW displaced from a shaft axis a radial distance ISR, a ratio of ISW/ISR between 0.074-0.293, to reduce cavitation and pressure ripple.
    Type: Application
    Filed: February 25, 2011
    Publication date: August 30, 2012
    Inventors: Weishun Ni, Satish Shantilal Shah, Timothy P. Walgren
  • Publication number: 20120156077
    Abstract: A vane pump is provided and includes a liner having an inlet window and a discharge window, the liner being formed to define a cam surface and a rotor carrying a plurality of radially extending vanes which are forced outwardly such that vane tips thereof contact with the cam surface, the rotor having a direction of rotation such that one end of the inlet window is an upstream end and an opposed end is a downstream end, a radius of each of the vane tips being approximately 0.114 inches (0.3 cm) and a profile of the cam surface being defined in accordance with the radius of the vane tips.
    Type: Application
    Filed: December 20, 2010
    Publication date: June 21, 2012
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Sara Dexter, Weishun Ni
  • Publication number: 20120141316
    Abstract: A gear includes a gear root defined by a stretched root blended into an involute tooth profile curve within a True Involute Form diameter.
    Type: Application
    Filed: December 6, 2010
    Publication date: June 7, 2012
    Inventors: David L. Wakefield, Weishun Ni
  • Patent number: 8137085
    Abstract: A gear pump comprises a drive gear being mounted for rotation about a first axis and having a plurality of gear teeth at a radially outer location. A driven gear is mounted for rotation about a second axis, and having a plurality of teeth at a radially outer location. The drive gear teeth engage the driven gear teeth at a contact face to cause the driven gear to rotate. Slots are formed in the contact face of one of the drive and driven gear teeth.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: March 20, 2012
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Weishun Ni, Steven A. Heitz, Joseph Wetch, Christian L. Griffiths
  • Publication number: 20100158739
    Abstract: A gear pump comprises a drive gear being mounted for rotation about a first axis and having a plurality of gear teeth at a radially outer location. A driven gear is mounted for rotation about a second axis, and having a plurality of teeth at a radially outer location. The drive gear teeth engage the driven gear teeth at a contact face to cause the driven gear to rotate. Slots are formed in the contact face of one of the drive and driven gear teeth.
    Type: Application
    Filed: December 18, 2008
    Publication date: June 24, 2010
    Inventors: Weishun Ni, Steven A. Heitz, Joseph Wetch, Christian L. Griffiths
  • Publication number: 20070009367
    Abstract: A pump that includes a cylinder housing having a through bore. A cylinder liner is disposed substantially within the through bore and includes a substantially uniform aperture having a first diameter. A plunger includes an engagement portion having a second diameter smaller than the first diameter. The first diameter and the second diameter are sized to define a first diametrical clearance that is less than about 0.1 percent of the second diameter.
    Type: Application
    Filed: April 21, 2005
    Publication date: January 11, 2007
    Applicant: KMT Waterjet Systems, Inc.
    Inventors: Dieter Tischler, Eric Roll, Jose Munoz, Christopher Tucker, Weishun Ni, Mitchell Reineck