Patents by Inventor Michael Shepherd

Michael Shepherd 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: 4403757
    Abstract: A modulating fluid shear coupling apparatus is disclosed herein which comprises a driving member mounted within a working chamber defined by a driven member and rotatable coaxial with the driven member. The driving and driven members include complementary shear surfaces to effect torque transmission between the two members when shear fluid is received between the shear surfaces. The driven member defines a reservoir and includes a passageway leading from the reservoir to the working chamber. At least two annular grooves are defined by the driven member and open into the working chamber adjacent the driving member at different radial positions. The annular grooves and associated passageways leading from the grooves to the reservoir provide for pumping the shear fluid from the working chamber back to the reservoir. Various control means are provided for selectively opening and closing the various passageways to yield several different degrees of coupling between the driving and driven members.
    Type: Grant
    Filed: March 20, 1981
    Date of Patent: September 13, 1983
    Assignee: Wallace Murray Corporation
    Inventor: Michael Shepherd
  • Patent number: 4341130
    Abstract: A torsional vibration damper of the type having an inertia ring member and a hub member coupled together by an elastomer member. The hub member may be in the form of a disc and is adapted to be coupled to a rotating shaft subject to torsional vibrations, the elastomer and inertia ring member acting in a known manner to damp torsional vibrations. According to this invention a seal, termed a dust and oil slinger, is mounted on the hub. The seal overlies the elastomer and protects it from dust or other particles and from corrosive fumes and liquids. The seal may additional serve as a sacrificial member which will, in certain corrosive ambients, degrade prior to degradation of the elastomer connecting the hub and inertia ring. The seal is either integral with the working elastomer member, or is formed by adhering to the working elastomer member a sealing material of a different composition.
    Type: Grant
    Filed: February 26, 1979
    Date of Patent: July 27, 1982
    Assignee: Wallace Murray Corporation
    Inventors: Michael Shepherd, Robert C. Bremer, Jr.
  • Patent number: 4302986
    Abstract: An elastomer torsional vibration damper having a hub of low mass. The hub is preferably formed of a rigid plastic such as a phenol-formaldehyde, or of glass filled nylon. According to the invention, the hub is formed of a material having a minimum specific volume of 12 cubic inches per pound to thereby reduce the parasitic inertia of the torsional vibration damper.
    Type: Grant
    Filed: February 6, 1978
    Date of Patent: December 1, 1981
    Assignee: Wallace Murray Corporation
    Inventor: Michael Shepherd
  • Patent number: 4178811
    Abstract: A torsional vibration damper of the type having an outer inertia ring, a radially intermediate elastomer annulus, and a radially innermost hub. The polar moment of inertia of the entire damper is reduced by forming the hub of a low density material such as aluminum or plastic. The specific improvement resides in metal reinforcing members molded or otherwise inserted into the hub, thus overcoming material weakness and the phenomenon of creep in the plastic.
    Type: Grant
    Filed: June 15, 1977
    Date of Patent: December 18, 1979
    Assignee: Wallace Murray Corporation
    Inventor: Michael Shepherd