公开(公告)号：CA1224508A

公开(公告)日：1987-07-21

申请号：CA440647

申请日：1983-11-08

Applicant: AVERILL STUART A

Inventor： AVERILL STUART A ,  HOKANSON LYLE W ,  KROEKER DAVID G

IPC: B62D49/08 ,  B62D61/10 ,  E21B7/02 ,  B60B37/00

Abstract: There is described a vehicle or vehicle frame including a first elongated sub-frame and a second sub-frame rotatably connected to one end of the first sub-frame for pivotal movement about the longitudinal axis of the first sub-frame. A walking beam is provided at each of the elongated sides of the first sub-frame in parallel, spaced apart relation thereto. A walking beam pivot assembly extends transversely across the first sub-frame adjacent the other end of the first sub-frame and each of the walking beams is pivotally connected at a point intermediate along its length to a respective outer end of the pivot assembly whereby each walking beam is suspended for independent pivotal movement in its own vertical plane. A connector is provided to join a first end of each walking beam to the adjacent end of the second sub-frame to permit simultaneous pivotal movements of the walking beams and the second sub-frame in their respective, mutually perpendicular vertical planes.