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. 17, 1981
Filed:
Nov. 20, 1978
Applicant:
Inventor:
Lawrance F Berg, Lockport, IL (US);
Assignee:
Caterpillar Tractor Co., Peoria, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B / ; F01B / ;
U.S. Cl.
CPC ...
91407 ; 92 8 / ; 188287 ;
Abstract
A fluid jack (10) has a cushioning device (21) positioned within a cylinder (11) between a piston means (12) and a closed end (13) with the cushioning device (21) being a self-contained unit independent of any major components of the fluid jack (10). A variable volume chamber (24) is formed between a pair of members (22,23) with the cushioning taking place by metering the fluid expelled from the variable volume chamber (24) in response to the piston means (12) engaging and moving one of the members (22,23) in a direction for decreasing the volume of the variable volume chamber (24).