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:
Apr. 27, 1976
Filed:
Mar. 05, 1975
Dale H Unruh, Peoria, IL (US);
Jan B Yates, Reynoldsburg, OH (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
A cushioning, leveling and lockup system for a suspended axle vehicle having a leveling control subsystem which automatically corrects any changes in the distance between a vehicle frame and axle by communicating pressurized fluid from a pressure source to reposition fluid suspension cylinder struts, and a lockup subsystem having a lockup valve which isolates spring cushioning devices from the suspension struts, to reduce suspension cushioning, the lockup subsystem permitting rotation about the longitudinal axis of the vehicle or roll oscillation during lockup by interconnecting the cylinders through a flow path across the lockup valve.