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. 08, 1992
Filed:
Feb. 13, 1991
Shuji Haga, Yokohama, JP;
Masatomo Tanuma, Yokohama, JP;
Iwata Air Compressor Manufacturing Co. Ltd., Tokyo, JP;
Abstract
A scroll-type fluid machine has an orbiting scroll with involute wraps projecting axially on each of opposite sides, a pair of stationary scrolls each with involute wraps which mate with the wraps of the orbiting scroll, and a main shaft inserted in a central axis hole of the stationary scrolls for driving the orbiting scroll in orbital movement. The internal ends of the wraps of the stationary scrolls are extended inwardly to an outer peripheral wall of a land part where the central axis hole is formed. The stationary scroll wraps are extended about a half turn longer than the wrap of the orbiting scroll and the internal ends of the wraps are almost in contact end to end at a desired phase during the orbiting movement of the orbiting scroll.