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:
Sep. 25, 1979
Filed:
Oct. 14, 1977
Richard Rettew, Newmanstown, PA (US);
Other;
Abstract
A rotary vane machine utilizing tapered vanes which are rotatably connected to a stationary center shaft and which extend through openings in the wall of an off-center hollow cylindrical rotor into sliding contact with an inner wall of the machine. Working chambers are formed between the vanes outside of the hollow rotor. Roller seals are provided in the rotor wall openings to isolate the inside of the rotor from the working chambers. Rollers which form the seals are disposed, with a close tolerance, in slots formed in the rotor wall openings on each side of the tapered vanes. A small opening, which communicates with one of the working chambers, is formed in the back of each roller slot to admit pressurized fluid from the working chamber to help bias the roller seals into contact with the tapered vanes. A check valve may be provided in the small opening to maintain pressure behind the roller seal. The roller seals are spring biased against the vanes and the roller slots are oriented so during operation centrifugal force urges the rollers against the tapered vanes.