Patents by Inventor Alvan J. Callahan

Alvan J. Callahan 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).

  • High torque capacity three output differential
    Patent number: 8585535
    Abstract: A differential for interconnecting an input member to a first, second, and third output member includes a housing interconnected with the input member and with the first output member, the housing having a first portion connected to a second portion, the first portion defining a first recess and the second portion defining a second recess, wherein the first recess and the second recess are aligned and cooperate to define a slot. A key member is disposed within the slot between the first portion and the second portion. A cross member is attached to the housing. A set of pinion gears is rotatable about the cross member. A set of side gears is intermeshed with the set of pinion gears, wherein one of the set of side gears is interconnected with the second output member and another of the set of side gears is interconnected with the third output member.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: November 19, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Surendar Shawn Paul, Martin Hefter, Richard F. Olenzek, Zinovy Soybel, William J. Duncan, Jr., Alvan J. Callahan, David Louis Pieknik
  • Differential carrier assembly for a vehicle
    Patent number: 8083628
    Abstract: A differential carrier assembly for use in an axle of a vehicle includes a differential carrier that extends along a central axis. The differential carrier defines a chamber. A first stub shaft extends along a first rotational axis, transverse to the central axis. The first stub shaft is disposed within the chamber and is supported by the differential carrier. A first pair of gears is disposed in spaced relationship on the first stub shaft for rotation about the first rotational axis. A second stub shaft extends along a second rotational axis, transverse to the central axis and the first rotational axis. The second stub shaft is disposed within the chamber and supported by the differential carrier. A second pair of gears is disposed in spaced relationship on the second stub shaft for rotation about the second rotational axis.
    Type: Grant
    Filed: January 19, 2009
    Date of Patent: December 27, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Zinovy Soybel, William J. Duncan, Jr., Martin Hefter, Alvan J. Callahan, Richard F. Olenzek
  • HIGH TORQUE CAPACITY THREE OUTPUT DIFFERENTIAL
    Publication number: 20110045933
    Abstract: A differential for interconnecting an input member to a first, second, and third output member includes a housing interconnected with the input member and with the first output member, the housing having a first portion connected to a second portion, the first portion defining a first recess and the second portion defining a second recess, wherein the first recess and the second recess are aligned and cooperate to define a slot. A key member is disposed within the slot between the first portion and the second portion. A cross member is attached to the housing. A set of pinion gears is rotatable about the cross member. A set of side gears is intermeshed with the set of pinion gears, wherein one of the set of side gears is interconnected with the second output member and another of the set of side gears is interconnected with the third output member.
    Type: Application
    Filed: August 18, 2009
    Publication date: February 24, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Surendar Shawn Paul, Martin Hefter, Richard F. Olenzek, Zinovy Soybel, William J. Duncan, JR., Alvan J. Callahan, David Louis Pieknik
  • DIFFERENTIAL CARRIER ASSEMBLY FOR A VEHICLE
    Publication number: 20100184552
    Abstract: A differential carrier assembly for use in an axle of a vehicle includes a differential carrier that extends along a central axis. The differential carrier defines a chamber. A first stub shaft extends along a first rotational axis, transverse to the central axis. The first stub shaft is disposed within the chamber and is supported by the differential carrier. A first pair of gears is disposed in spaced relationship on the first stub shaft for rotation about the first rotational axis. A second stub shaft extends along a second rotational axis, transverse to the central axis and the first rotational axis. The second stub shaft is disposed within the chamber and supported by the differential carrier. A second pair of gears is disposed in spaced relationship on the second stub shaft for rotation about the second rotational axis.
    Type: Application
    Filed: January 19, 2009
    Publication date: July 22, 2010
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Zinovy Soybel, William J. Duncan, JR., Martin Hefter, Alvan J. Callahan, Richard F. Olenzek