Patents by Inventor David S. Cameron

David S. Cameron 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: 6357768
    Abstract: A straight line linkage mechanism for a solid axle of a motor vehicle (referable to alternatively as a “Chan-Cameron mechanism” or as a “Chan-Cameron linkage mechanism”) includes a main bar, a tie rod and a shackle. The shackle is preferably configured as an “A-arm”, having its legs pivotally connected to a solid axle. The apex of the shackle is pivotally connected to a first end of the main bar. The opposite second end of the main bar is pivotally connected to the frame. The tie rod is pivotally connected at one end to a mid-range location of the axle and, at its opposite end, pivotally to a mid-point location of the main bar. The connection locations of the main bar are spaced apart twice as far as the connection locations of the tie rod. In operation, as the axle moves vertically relative to the frame in response to the wheels encountering irregular terrain, the first end of the main bar will tend to move horizontally.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: March 19, 2002
    Assignee: General Motors Corporation
    Inventors: Stephen K. Chan, David S. Cameron
  • Patent number: 5116341
    Abstract: A lifting shackle comprises a head plate (1) having a central aperture (4). A pair of load supporting arms (2) are each attached pivotably to the head plate at respective points substantially equi-distant from a vertical, in use, axis of the head plate passing through the aperture (4). The load supporting arms define facing channels which receive laterally spaced edges of the load. At or near the remote end of each load supporting arm (2) a load attachment bar (5) is provided for engaging the load to be lifted.
    Type: Grant
    Filed: February 1, 1991
    Date of Patent: May 26, 1992
    Assignee: British Guide Rails Limited
    Inventor: David S. Cameron
  • Patent number: 4826204
    Abstract: This suspension strut has upper and lower air sleeves which when pressurized with air provide the air spring suspension of a vehicle and which are axially offset from one another so that a force couple is formed that provides a moment which counteracts the moment resulting from the tire contact patch acting at a distance from the lower ball joint. With the tire contact moment neutralized, the side loads on the bearing and other sliding components of the strut are eliminated or sharply reduced to increase efficiency of strut operation and enhance strut durability.
    Type: Grant
    Filed: June 20, 1988
    Date of Patent: May 2, 1989
    Assignee: General Motors Corporation
    Inventor: David S. Cameron
  • Patent number: 4655438
    Abstract: A dual path rolling lobe air spring suspension strut with the inner rolling lobe air seal eliminating air pressurization of the strut to eliminate the strut mount as a leak path and so that the sealing of air within the air spring in the vicinity of the strut rod is eliminated so that the strut rod scraper lip and air pressurization of the strut valving is eliminated.
    Type: Grant
    Filed: December 23, 1985
    Date of Patent: April 7, 1987
    Assignee: General Motors Corporation
    Inventor: David S. Cameron
  • Patent number: 4648623
    Abstract: A lower bearing air strut which moves the point of steering rotation of a dirigible road wheel to the bottom of the reservoir of the strut. This provides improved support between the road wheel assembly and the air strut and allows the air spring to be leak tested prior to vehicle assembly. The upper mount is fixed to the mounting tower by a retainer ring so it does not rotate and provides improved sealing of the upper extremity of the air spring.
    Type: Grant
    Filed: February 28, 1986
    Date of Patent: March 10, 1987
    Assignee: General Motors Corporation
    Inventor: David S. Cameron