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. 07, 1978
Filed:
Mar. 12, 1976
Paul J Staebler, Dunlap, IL (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
A rotary mechanism including a housing defining an operating chamber, a rotor journalled within the chamber, at least one seal receiving groove in the rotor, a seal within the groove, a spring within the groove and urging the seal into sealing engagement with the housing, a source of oil under pressure, and an oil conduit in fluid communication with the source and ending in an opening in the groove beneath the spring and positioned to be closed by the spring so that the spring additionally serves as a check valve opening to permit oil to enter the groove when oil under pressure is directed to the conduit and prevents pressurized gas from entering the conduit from the chamber.