Patents by Inventor Trevor Pitchford

Trevor Pitchford 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).

  • Clamp ring
    Patent number: 5458430
    Abstract: A gear (5) can set up a high intermittent or continuous axial thrust in operation, whether shifting or driving operation. A single split circular spring clip (3) in a groove on the gearshift (2) can tend to yield by expansion under such a load. Accordingly a further split circular spring reinforcement ring (7) having a conical surface (10) facing the gear (5), is abutted by, preferably, a matching conical surface (13) which is moved with the gear (5). The abutting of the reinforcement ring (7) causes the ring to contract around the gearshaft (2), increasing friction and consequently, the resistance axial movements.
    Type: Grant
    Filed: November 15, 1993
    Date of Patent: October 17, 1995
    Assignee: Eaton Corporation
    Inventor: Trevor Pitchford
  • Transmission shaft carrying at least two gears
    Patent number: 5272929
    Abstract: A gear shaft assembly (42) is provided including a shaft (5) having a first set of gear teeth (6) formed integrally in a second portion (51) thereof and extensions of said teeth extend axially over an adjacent reduced diameter second portion (50) for receivably mounting a second gear (7) for rotation with the shaft.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: December 28, 1993
    Assignee: Eaton Corporation
    Inventors: Melvern W. Fletcher, Trevor Pitchford, David G. Cooper
  • Power take-off engagement mechanism
    Patent number: 5070982
    Abstract: A pneumatic PTO engagement mechanism (100) is provided having a feed shaft which (18) passes through a central bore in the input PTO gear (2) in known manner and which is rotationally and axially fixed in the PTO housing (1). The PTO input gear is slidable and rotatable over the shaft, an intermediate seal (28) enables this; and a coil spring (23) to resist engagement of the PTO acts directly on the piston (26) and is received in a blind bore (12A) in the input shaft.
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: December 10, 1991
    Assignee: Eaton Corporation
    Inventor: Trevor Pitchford
  • Neutral sensing assembly
    Patent number: 5031472
    Abstract: A neutral sensing assembly for a multiple shift rail (60B, 62B, 64B) shift bar housing assembly (70) is provided. The neutral sensing assembly utilizes a single two-position sensing (112, 114) and a relatively simply shaped neutral sensing bar (104) extending generally transverse to the axes (80, 82, 84) of the shift rails and interacting with neutral sensing notches (60C, 62C, 64C) for displacing the neutral sensing bar (FIG. 4 and 6) sufficiently to actuate the sensing upon axial displacement of any of the shift rails sufficient to cause the transmission (10) to be engaged in a not neutral condition.
    Type: Grant
    Filed: February 1, 1990
    Date of Patent: July 16, 1991
    Assignee: Eaton Corporation
    Inventors: Brian J. Dutson, Trevor Pitchford