Patents by Inventor Thomas H. Gardner

Thomas H. Gardner 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: 5361480
    Abstract: An apparatus is provided for use in a method of making a torque converter clutch. The torque converter clutch is comprised of an annular clutch plate to which is secured or bonded an annular friction surface. The annular friction surface is formed on the machine by die-stamping, from a flat sheet of friction material, successive arcuate segments. Each arcuate segment is stamped into a holding ring which is indexed to accept the next successive segment until a full annulus is provided. The holding ring is transported to a stripper station. Simultaneous with the stamping, the annular clutch plate is heated and transported to the stripper station. When both components are in the stripper station, the friction annulus is stripped from the holding ring onto the heated clutch plate. The clutch plate and attached friction annulus are discharged from the machine. Simultaneous with the stamping, the offal of the sheet of friction material is cut transversely and longitudinally for discharge into an egress channel.
    Type: Grant
    Filed: August 27, 1993
    Date of Patent: November 8, 1994
    Assignee: General Motors Corporation
    Inventors: Thomas H. Gardner, Raymond F. Fritz, Patrick J. Roberts
  • Patent number: 5112116
    Abstract: A vehicle wheel anti-lock braking system (ABS) is provided including a master cylinder and a wheel brake. A controller cognizant of the rotational condition of the wheel provides a signal when the wheel condition is within preset parameters. An actuator frame is also provided having a bore fluidly communicating with the wheel brake. A piston is mounted within the bore for providing a variable control volume in communication with the wheel brake and for modulating the pressure therein. A reversible motor reciprocally powers the piston. The motor has a rotor with a connected disc. A friction surface is provided for engagement with the disc to lock the position of the piston. A plunger is also provided to urge the friction surface into engagement with the disc. An electromagnetic core, responsive to a signal by the controller, moves the plunger to a position allowing cessation of engagement between the friction surface and the disc thereby allowing rotation of the motor and movement of the piston.
    Type: Grant
    Filed: March 14, 1991
    Date of Patent: May 12, 1992
    Assignee: General Motors Corporation
    Inventors: Naila Mikhaeil-Boules, Robert J. Hammersmith, Kevin G. Leppek, Paul D. Wilkey, Thomas H. Gardner, Dennis J. Ricker, James J. Kowalik
  • Patent number: 5102206
    Abstract: An anti-lock braking system (ABS) and traction control (TC) integration is provided including an actuator with fluid connections with a master cylinder, reservoir, and a wheel cylinder. A primary piston with an interior bore and a radial bore for selective alignment with the actuator fluid connections is slidably mounted in the actuator. A normally closed solenoid valve connects the reservoir with the actuator. A sensor determines wheel speed and generates a signal. The primary piston is moved along an actuator bore in response to the signal. The actuator also has a bore axial stop. A secondary piston is slidably mounted within the primary piston. The secondary piston has land surfaces forming a sealed chamber within the primary piston and a head section sealably mounted within the actuator bore exposed to the actuator connection with the wheel cylinder. The piston has an interior passage connecting the actuator connection with the wheel cylinder with the secondary piston sealed chamber.
    Type: Grant
    Filed: June 6, 1991
    Date of Patent: April 7, 1992
    Assignee: General Motors Corporation
    Inventors: Alfred C. Vennemeyer, Thomas H. Gardner
  • Patent number: 5029950
    Abstract: An anti-lock braking system (ABS) and traction control (TC) integration is provided including an actuator with fluid connections with a master cylinder, reservoir, and a wheel cylinder. A primary piston with an interior bore and a radial bore for selective alignment with the actuator fluid connections is slidably mounted in the actuator. A normally closed solenoid valve connects the reservoir with the actuator. A sensor determines wheel speed and generates a signal. The primary piston is moved along an actuator bore in response to the signal. The actuator also has a bore axial stop. A secondary piston is slidably mounted within the primary piston. The secondary piston has land surfaces forming a sealed chamber within the primary piston and a head section sealable mounted within the actuator bore exposed to the actuator connection with the wheel cylinder. The piston has an interior passage connecting the actuator connection with the wheel cylinder with the secondary piston sealed chamber.
    Type: Grant
    Filed: June 26, 1989
    Date of Patent: July 9, 1991
    Assignee: General Motors Corporation
    Inventors: Alfred C. Vennemeyer, Thomas H. Gardner
  • Patent number: 5000523
    Abstract: A vehicle wheel anti-lock braking system (ABS) is provided including a master cylinder and a wheel brake. An ABS controller cognizant of the rotational condition of the wheel provide a signal when the wheel condition is within preset parameters. An isolation valve responsive to close upon an activation signal given by said controller prevents fluid communication between the master cylinder and the wheel brake. An actuator frame is also provided having a bore fluidly communicating with the wheel brake. A piston is mounted within the bore for providing a variable control volume in communication with said wheel brake for and modulating the pressure therein. A reversible motor reciprocally powers piston. The motor has a rotor with a connected disc. A friction surface is provided for engagement with the disc to lock the position of the piston. A plunger is also provided to urge said friction surface into engagement with said disc.
    Type: Grant
    Filed: May 17, 1989
    Date of Patent: March 19, 1991
    Assignee: General Motors Corporation
    Inventors: Naila Mikhaeil-Boules, Robert J. Hammersmith, Kevin G. Leppek, Paul D. Wilkey, Thomas H. Gardner, Dennis J. Ricker, James J. Kowalik
  • Patent number: 4813996
    Abstract: Particulate nutrient material for use as fertilizer or animal feedstock is produced from absorbent paper shreds or particles, for example of newsprint, impregnated with animal manure--for example as a result of use of the paper as bedding for chickens. The impregnated paper shreds or particles are compacted and pelleted, and may be mixed with superphosphate and/or fishmeal before pelleting.
    Type: Grant
    Filed: October 17, 1984
    Date of Patent: March 21, 1989
    Inventors: Thomas H. Gardner, Gareth D. J. Whitehead
  • Patent number: 4376422
    Abstract: This invention provides bedding material or litter for animals, consisting of strips or pieces of absorbent non-toxic paper of randomly distributed lengths. The paper, for example in the form of newspaper sheets, is shredded and the shreds are then cut into short strips or small `diced` pieces which are used as the bedding material. The cutting of the paper shreds is effected by means of a high speed rotary shearing cutter having heavy duty blades which cooperate with a stator bar. By arranging for the rotary cutter blades to have different clearances from the stator bar a mixture of cut shred lengths can be obtained which makes an ideal bedding material.
    Type: Grant
    Filed: January 28, 1981
    Date of Patent: March 15, 1983
    Inventors: Gareth D. J. Whitehead, Thomas H. Gardner
  • Patent number: 4201128
    Abstract: Shredded paper for use as animal bedding material is compacted for packing by a reciprocating hydraulic compacting ram which displaces the material into an ejector chamber in a number of successive storkes. The pressure in the compacting ram is monitored by a pressure switch, and when a threshold pressure corresponding to a desired degree of compaction is reached a limit switch is effectively primed to trip the operation of an ejector ram upon completion of a compaction stroke, to eject the compacted material from the ejector chamber.The production of fertilizer particles is also described in which shredded paper impregnated with manure after use is comminuted and at least partially dried.
    Type: Grant
    Filed: September 5, 1978
    Date of Patent: May 6, 1980
    Inventors: Gareth D. J. Whitehead, Thomas H. Gardner