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:
Feb. 02, 1982
Filed:
Jul. 11, 1979
John R Muntjanoff, Aurora, IL (US);
Charles E Lanchantin, Jr, Peoria, IL (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
A self adjusting actuator system (32/32') has an actuator housing (40), a telescoping piston (52) defining therewith head and rod end chambers (58,60), and a compression spring (66) disposed for biasing the piston (52) in a preselected direction against an external force. A control system supplies fluid selectively to either of the chambers (58,60) and includes control device (33/33') for selectively permitting egress of fluid from the rod end chamber (60) to permit the piston (52) to move in the preselected direction in response to a change in the external force. Such system is particularly useful in a log grapple (10).