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:
Oct. 06, 1981
Filed:
Dec. 31, 1979
William R Weber, Seattle, WA (US);
Other;
Abstract
A hydraulic cushioning device, hereinafter called cushion device, improvement in which a spring loaded piston, with an axial orifice, is slidably installed in the expansion chamber, and when return pressure from a hydraulic actuator, hereinafter called actuator is routed to the expansion chamber, by the cushion device, the piston, responding to this pressure moves slowly compressing a spring until it hits a stop at which time the remaining fluid from the actuator must pass through the cushion device restriction thus slowing the actuator rod speed and as the actuator bottoms the cushion device will cease routing actuator fluid under pressure to the expansion chamber and will open the expansion chamber to drain at which time the spring, in the expansion chamber, will force the piston toward the starting end of the expansion chamber, hastening the emptying thereof.