Straddle crane steering system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 14, 1989
Grant Date -
N/A
app pub date -
Apr 22, 1988
filing date -
Apr 22, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention is suitable for use in a straddle-type crane having a frame and four corners, and comprises a system for the manual resynchronization or automatic synchronous movement of a plurality of pairs of steerable wheels. The pairs of steerable wheels are pivotal relative to the frame. The system comprises a hydraulically-actuated link and tie rod at each corner of the frame to turn all pairs of steerable wheels at each corner of said frame. It further comprises a hydraulic cylinder for each of the hydraulically-actuated links and tie rods, with the hydraulic cylinders being connected to each other in series relationship. The system also comprises a steering orbitrol which directs hydraulic fluid through the series-connected hydraulic cylinders.
First Claim
Other Claims data not available