Patents by Inventor James D. Telfer

James D. Telfer 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).

  • Mobile cranes or aerial lift platforms
    Patent number: 4458780
    Abstract: A mobile crane or aerial lift platform vehicle wherein the chassis comprises a horizontally disposed solid metal slab carrying axle/outrigger mountings and on which the boom or jib turntable is mounted. This has the advantage both of providing stability because of the weight of the solid chassis and of cheaper fabrication and assembly.
    Type: Grant
    Filed: August 27, 1981
    Date of Patent: July 10, 1984
    Assignee: Coles Cranes Limited
    Inventor: James D. Telfer
  • Mobile cranes or aerial lift platforms
    Patent number: 4449600
    Abstract: The invention relates to a mobile crane or aerial lift platform vehicle wherein at least one of the axles is extendable and wherein a cylindrical housing carries the extendable axle beam and a steering actuator is carried on at least one of the beams and is connected to a steering link connected between the wheel and the outer end of the beam. The arrangement is such that the distance between the actuator and the steering link is not altered by extension or contraction of the beam relative to its housing.
    Type: Grant
    Filed: August 27, 1981
    Date of Patent: May 22, 1984
    Assignee: Coles Cranes Limited
    Inventor: James D. Telfer