The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 14, 1989
Filed:
Apr. 22, 1988
Thomas Feider, Sturgeon Bay, WI (US);
Gerald P Lamer, Sturgeon Bay, WI (US);
Norbert W Lenius, Sturgeon Bay, WI (US);
Marine Travelift, Inc., Sturgeon Bay, WI (US);
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.