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:
Mar. 02, 1976
Filed:
Jan. 29, 1975
Franz Huf, Constance, DT;
Dornier System GmbH., , DT;
Abstract
This invention relates to an improvement in a rotary piston machine comprising a jacket and two side parts forming a housing, inlet and outlet means on said housing, a piston patterned after a saddle-free epitrochoid 1:1 mounted in said housing for rotation on an eccentric shaft, annularly-closed axial seals on the sides of the piston in proximity to the piston edge, and a pair of oppositely-positioned radial seals in said housing, the improvement comprising that the axial seal on each side of the piston is composed of two seal means equidistant with respect to each other and being closed within themselves, and lubricant opening means in said side parts in proximity to at least one of said radial seals, said openings being located essentially in the interstice between said two seal means in any position of the piston, or being covered temporarily at least in part by one of said two seal means.