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:
Aug. 29, 1995
Filed:
Mar. 02, 1993
Guy F Dusserre-Telmon, Sivry-Courtry, FR;
Daniel G Plona, Vulaines sur Seine, FR;
Abstract
A seal arrangement located between a lubricated chamber and a pressurized chamber pressurized by a gas at a variable pressure. The seal arrangement includes a seal around a shaft extending into the lubricated and pressurized chambers through a wall separating the chambers. The seal slides along the shaft between a first and a second abutment position via a variable pressure exerting a force on an end face, i.e., a casing, of the seal. The casing, the shaft and seal define a clearance allowing air to pass from the pressurized chamber to the lubricated chamber. Springs urge the seal toward the first abutment position against the variable pressure and have a strength so that, when the variable pressure is under a predetermined value, the clearance is sealed. When the variable pressure is over a predetermined value, the seal slides to the second abutment position and the clearance is opened to allow the pressurized gas to flow from the pressurized chamber to the lubricated chamber.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile