Patents by Inventor Glenn C. Lemmers

Glenn C. Lemmers 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: 20180316248
    Abstract: A rectifier assembly according to an example of the present disclosure includes, among other things, a first housing and a second housing extending along an assembly axis, the first housing surrounding a pair of electrical rings. At least one spring strip includes a first spring strip portion transverse to a second spring strip portion, the second spring strip portion to bias diodes against an inner periphery of the pair of electrical rings. The second housing includes at least one connection terminal for receiving a wire from an exciter rotor, the at least one connection terminal including a screw threaded area which receives a bolt holding the first spring strip portion. A generator and a method of assembling a rectifier assembly are also disclosed.
    Type: Application
    Filed: July 17, 2017
    Publication date: November 1, 2018
    Inventors: Dhaval Patel, Glenn C. Lemmers, Edward C. Allen, Andrew R. Wilkinson
  • Publication number: 20180266532
    Abstract: A method of driving an integrated drive generator is provided. The method includes driving a carrier shaft of an epicyclic differential and a variable component of a hydraulic trimming device that is operably coupled to a sun gear of the epicyclic differential. The method also includes driving a generator with an output ring gear that is maintained at a constant output frequency. The method further includes maintaining the constant output frequency by controllably manipulating the speed of the sun gear that is in operable communication with the output ring gear.
    Type: Application
    Filed: May 22, 2018
    Publication date: September 20, 2018
    Inventors: Andrew P. Grosskopf, Glenn C. Lemmers, JR.
  • Publication number: 20180269817
    Abstract: A generator arrangement includes a stator with armature winding, a rotor with one or more permanent magnets supported for rotation relative to the stator, a variable speed drive, and a control module. The variable speed drive is connected to the rotor for rotating the rotor within a predetermined speed range. The control module is disposed in communication with the armature windings and is operatively connected to the variable speed drive to maintain constant output voltage as load changes by varying rotational speed of the rotor.
    Type: Application
    Filed: March 17, 2017
    Publication date: September 20, 2018
    Inventors: Dhaval Patel, Jonathan C. Dell, Andreas C. Koenig, Glenn C. Lemmers, JR.
  • Patent number: 10056805
    Abstract: A generator assembly includes a generator shaft defining an interior vent space. A valve assembly is positioned within the vent space configured to selectively allow venting of air through the generator shaft. A radial vent is positioned within the valve assembly configured to prevent oil from flowing through the vent space during operation and release air through the vent space during shutdown.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: August 21, 2018
    Assignee: Hamilton Sundstrand Corporation
    Inventors: David S. Behling, Glenn C. Lemmers, Jr.
  • Publication number: 20180209513
    Abstract: A low speed spool multispeed transmission includes an input shaft configured to connect to a low pressure spool gearbox, a gear system connected to the input shaft and configured to convert an input speed of the input shaft to an output speed within a predetermined speed range, wherein the gear system includes a plurality of gear states to change the ratio between the input speed and the output speed, and an output shaft connected to the gear system to be rotated by the gear system at the output speed, the output shaft configured to connect to a generator. The input shaft and the output shaft can be coaxial.
    Type: Application
    Filed: January 20, 2017
    Publication date: July 26, 2018
    Inventor: Glenn C. Lemmers, JR.
  • Patent number: 10024413
    Abstract: Embodiments herein relate to piece-part, sub-assembly, assembly, and component levels of a differential composed of a sun gear configuration and utilized in an integrated drive generator. An integrated drive generator is a hydro-mechanical transmission that drives a synchronous salient pole generator. The integrated drive generator is a constant speed output, variable speed input transmission that includes the differential and a hydraulic unit. In general, the integrated drive generator utilizes the variable speed input from an accessory gear box of an engine to drive or control a hydraulic unit, which in turn drives or controls a churn leg member of the differential. As the differential is driven, speeds of each speed member of the differential are then summed to generate the constant speed output to drive the synchronous salient pole generator.
    Type: Grant
    Filed: April 3, 2015
    Date of Patent: July 17, 2018
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Glenn C. Lemmers, Jr., Aaron M. Finke, Doren C. Smith, Andrew P. Grosskopf, David S. Behling
  • Patent number: 9989138
    Abstract: An integrated drive generator having a variable input speed and constant output frequency, where the integrated drive generator includes a generator disposed about a first centerline. Also included is a hydraulic trimming device disposed about a second centerline. Further included is an epicyclic differential having a ring gear and a sun gear, wherein at least one of the ring gear and the sun gear drives the generator at a constant output frequency, wherein the epicyclic differential is disposed about a third centerline, wherein the third centerline is coaxial with the second centerline.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: June 5, 2018
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Andrew P. Grosskopf, Glenn C. Lemmers, Jr.
  • Patent number: 9917490
    Abstract: A gas turbine engine is provided, comprising a tail cone and a low-pressure spool outside the tail cone. An input shaft may be coupled to the low-pressure spool and inside the tail cone. A differential may be coupled to the input shaft and inside the tail cone. A generator may be coupled to the differential and also disposed inside the tail cone. An oil pump may be configured to pump oil through the generator to the differential. A generator assembly is also provided. The generator assembly may comprise an input shaft, a differential coupled to the input shaft, a rotating transfer tube coupled to the differential, a generator coupled to rotating transfer tube, and an oil pump configured to pump oil from the generator, through the rotating transfer tube, and into the differential.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: March 13, 2018
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Glenn C. Lemmers, Todd A. Spierling
  • Patent number: 9874245
    Abstract: A device with a rotating element includes a housing body formed from a light alloy, wherein the housing body has a housing body thermal expansion coefficient, a bearing liner formed from a liner material disposed within the housing body, wherein the bearing liner has a bearing liner thermal expansion coefficient, and a bearing to support the rotating element with an outer race, wherein the bearing has a bearing thermal expansion coefficient, the outer race is press fit within the bearing liner, and the bearing liner thermal expansion coefficient is lower than the bearing thermal expansion coefficient.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: January 23, 2018
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Glenn C. Lemmers, Jr., Andrew P. Grosskopf
  • Patent number: 9863544
    Abstract: A pressure-regulating valve assembly includes a sleeve body and a spool. The sleeve body has an interior surface and a sense port. The spool has an external surface and is slideably received within the sleeve body such that the external spool surface and the sleeve body interior surface define therebetween a plurality of sleeve body chambers. A first of the sleeve body interior chambers is a deadheaded chamber in fluid communication with the environment external to the sleeve body through the sense port for controlling pressure of fluid traversing the pressure-regulating valve assembly.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: January 9, 2018
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Glenn C. Lemmers, Jr.
  • Patent number: 9863408
    Abstract: A slipper retainer of a hydraulic unit having a circular body having a back surface and an outer edge, the circular body defining a diameter of about 2.240 inches (5.629 cm), a central aperture through a center of the circular body, the circular body having a curved surface defining an edge of the central aperture, wherein the curved surface is defined by a sphere that is centered at a point located a distance of about 0.209 inches (0.531 cm) from the back surface of the body, and a plurality of slipper apertures located between the curved surface of the circular body and the outer edge of the circular body, wherein each slipper aperture of the plurality of slipper apertures has a diameter of about 0.464 inches (1.179 cm).
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: January 9, 2018
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Kris H. Campbell, Glenn C. Lemmers, Jr., Doren C. Smith
  • Patent number: 9845679
    Abstract: A port plate assembly of a hydraulic unit includes a port plate and a journal bearing. The port plate includes a fixed-speed interface side having a fixed-speed interface surface, and a variable-speed interface side having a variable-speed interface surface. A plurality of kidney-shaped apertures is defined at a kidney pitch diameter about a central bore of the port plate between the fixed-speed interface surface and the variable-speed interface surface. The port plate also includes control cylinder interface formed at a control cylinder radial offset from a central axis of the central bore, where a ratio of the control cylinder radial offset to the kidney pitch diameter is between 1.629 and 1.639. The journal bearing is installed in the central bore of the port plate, where the journal bearing provides an interface for a fixed-speed shaft and a variable-speed shaft of the hydraulic unit.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: December 19, 2017
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Kris H. Campbell, Glenn C. Lemmers, Jr., Doren C. Smith
  • Patent number: 9784380
    Abstract: A valve assembly for a variable frequency generator includes an input shaft extending about a longitudinal axis and having a bore defined therein. Also included is a disconnect shaft extending about the longitudinal axis and disposed in abutment with the input shaft. Further included is an oil restrictor disposed with the bore of the input shaft. Yet further included is a vent valve disposed within the bore and in abutment with the oil restrictor, the vent valve comprising an angled wall, the angled wall partially defining an annulus. Also included is a plurality of ball bearings disposed within the annulus, the plurality of ball bearings sliding radially outwardly away from the longitudinal axis during rotational operation of the input shaft to apply a force on the angled wall of the vent valve to bias the vent valve axially into a sealed condition.
    Type: Grant
    Filed: October 12, 2015
    Date of Patent: October 10, 2017
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventor: Glenn C. Lemmers, Jr.
  • Patent number: 9759305
    Abstract: A planet gear for an integrated drive generator includes a planet gear body having an outer diametric surface provided with fifteen (15) gear teeth. The integrated drive generator can include a housing that surrounds an input system. The input system can be operatively coupled to a variable speed drive source. The integrated drive generator can also include a generator and an epicyclic differential gear system.
    Type: Grant
    Filed: April 2, 2015
    Date of Patent: September 12, 2017
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Glenn C. Lemmers, Jr., Aaron M. Finke, Doren C. Smith, Andrew P. Grosskopf, David S. Behling
  • Patent number: 9755472
    Abstract: A rotor connection support comprising a main connection ring configured to reduce the moment load on fastener locations (such as threaded fastener locations) by integrating stand-off posts into a high strength plate are discussed herein. These stand-offs may be configured to reduce the stresses on the high stress concentration/low cross section threads. Also, included is an improved wire routing and wire support configured to maximize the fatigue cycles of the main field lead wires.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: September 5, 2017
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Timothy R. Welch, Brian C. Konopa, Glenn C. Lemmers, Jr., Luke Wagner
  • Patent number: 9719499
    Abstract: A slipper retainer ball of a hydraulic unit having an aperture passing through a body, the body having a flat bottom surface, a flat top surface, an external curved surface, and an interior profiled surface that extends in an axial direction from the bottom surface to the top surface. The interior profiled surface includes a first surface extending parallel to the axis from the bottom surface in the axial direction, a second surface extending perpendicular to the axis from the first surface and outward toward the external curved surface, a third surface extending from the second surface axially at a first angle, a fourth surface extending from the third surface in the axial direction, and a fifth surface extending from the fourth surface to the top surface at a second angle that is skew from the axis. The axial thickness of the body is about 0.471 inches.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: August 1, 2017
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Kris H. Campbell, Glenn C. Lemmers, Jr., Mark J. Franklin
  • Patent number: 9714702
    Abstract: A variable coaxial shaft for a hydraulic unit includes a shaft body having a variable input shaft interface to drive rotation of a variable input shaft of the hydraulic unit. The variable coaxial shaft also includes a differential assembly interface having a first sealing interface, a second sealing interface, and one or more lubrication ports between the first sealing interface and the second sealing interface. The differential assembly interface is configured to be driven by a differential assembly. The one or more lubrication ports provide a lubrication path to the differential assembly. A shaft length is defined between a first end of the variable input shaft interface and a second end of the differential assembly interface. A ratio of the shaft length to a shaft diameter of the shaft body is between 18.65 and 19.12.
    Type: Grant
    Filed: March 20, 2015
    Date of Patent: July 25, 2017
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Kris H. Campbell, Glenn C. Lemmers, Jr., Mark J. Franklin
  • Patent number: 9709157
    Abstract: Embodiments herein relate to piece-part, sub-assembly, assembly, and component levels of a differential composed of a sun gear configuration and utilized in an integrated drive generator. An integrated drive generator is a hydro-mechanical transmission that drives a synchronous salient pole generator. The integrated drive generator is a constant speed output, variable speed input transmission that includes the differential and a hydraulic unit. In general, the integrated drive generator utilizes the variable speed input from an accessory gear box of an engine to drive or control a hydraulic unit, which in turn drives or controls a churn leg member of the differential. As the differential is driven, speeds of each speed member of the differential are then summed to generate the constant speed output to drive the synchronous salient pole generator.
    Type: Grant
    Filed: April 3, 2015
    Date of Patent: July 18, 2017
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Glenn C. Lemmers, Jr., Aaron M. Finke, Doren C. Smith, Andrew P. Grosskopf, David S. Behling
  • Patent number: 9695926
    Abstract: Embodiments herein relate to piece-part, sub-assembly, assembly, and component levels of a differential composed of a sun gear configuration and utilized in an integrated drive generator. An integrated drive generator is a hydro-mechanical transmission that drives a synchronous salient pole generator. The integrated drive generator is a constant speed output, variable speed input transmission that includes the differential and a hydraulic unit. In general, the integrated drive generator utilizes the variable speed input from an accessory gear box of an engine to drive or control a hydraulic unit, which in turn drives or controls a churn leg member of the differential. As the differential is driven, speeds of each speed member of the differential are then summed to generate the constant speed output to drive the synchronous salient pole generator.
    Type: Grant
    Filed: April 3, 2015
    Date of Patent: July 4, 2017
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Glenn C. Lemmers, Jr., Aaron M. Finke, Doren C. Smith, Andrew P. Grosskopf, David S. Behling
  • Publication number: 20170159714
    Abstract: A device with a rotating element includes a housing body formed from a light alloy, wherein the housing body has a housing body thermal expansion coefficient, a bearing liner formed from a liner material disposed within the housing body, wherein the bearing liner has a bearing liner thermal expansion coefficient, and a bearing to support the rotating element with an outer race, wherein the bearing has a bearing thermal expansion coefficient, the outer race is press fit within the bearing liner, and the bearing liner thermal expansion coefficient is lower than the bearing thermal expansion coefficient.
    Type: Application
    Filed: December 7, 2015
    Publication date: June 8, 2017
    Inventors: Glenn C. Lemmers, JR., Andrew P. Grosskopf