Patents Assigned to Hickman Developments, Inc.
  • Patent number: 3936073
    Abstract: In a friction-free vehicle suspension having axle ends pivotally connected by side walking beams, which are journalled on the ends of a cross rod, the improvement resides in the mounting, arrangement and proportioning of both helical compression springs and rectilinear movement shear rubber springs to support the vehicle frame on the ends of the cross rod. This is done in such manner as to achieve the maximum advantages from the distinctive characteristics of each type. The helical springs, which provide, in a very small space, a very large amount of resilient support, but no lateral control, are located inboard along the cross rod. The shear rubber springs are so mounted outboard along the cross rod to be fully effective in providing adequate resilient control of axle movement both laterally and longitudinally of the line of vehicle movement, as well as vertically, and also to provide high and wide stable spring centers for sidesway control.
    Type: Grant
    Filed: April 7, 1975
    Date of Patent: February 3, 1976
    Assignee: Hickman Developments, Inc.
    Inventors: Albert F. Hickman, Robert G. Moore