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. 02, 1984
Filed:
Apr. 05, 1982
Peter Durenec, Annandale, VA (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
A fluidic bearing seal assembly comprised of a plurality of floating back ring seals positioned in a plurality of annular grooves in a piston with at least one free-floating sealing wedge fitted to the outer peripheral edge of each backing ring for sliding along the cylinder wall. The piston has an inlet port and one way check valve means in the head thereof through which the working fluid is compressed during the compression stroke into a plurality of passageways that route the working fluid under pressure against said plurality of floating backing ring seals and into a pressure reservoir directly in contact with the cylinder wall and between adjacent backing ring seals to press the backing ring seals and seal wedges against the cylinder wall during the compression stroke and release the pressure from the ring seals and wedges during the return stroke of the piston.