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Patent Searching and Data

Document Type and Number:
Japanese Patent JP3495216
Kind Code:

PROBLEM TO BE SOLVED: To ensure rigidity of an Oldham's coupling as well as preventing inclining of the Oldham's coupling in which abrasion of key-shaped projections is generated by arranging, as a first sliding surface of a frame, a bottom surface of a straight groove in which key- shaped projections of the Oldham's coupling are formed, and arranging a second sliding surface of the frame on the plane flush with the first sliding surface.
SOLUTION: In an Oldham's coupling as a self-rotation preventing mechanism of a turning scroll, key-shaped projections 502 are arranged on an upper face of an annular member 501, and a key-shaped projection 504 is formed on a lower surface of the annular member 501 by a pair of straight grooves 503 which are arranged in the direction perpendicular to the key-shaped projections 502 arranged on the upper face, and cutout parts 505 having an L-shaped cross section are arranged on the back surface of the key-shaped projections 502. The upper face key-shaped projections 502 are engaged with the key groove of the turning scroll, and the lower face key-shaped projection 504 is engaged with the key-groove of the frame. The bottom surface of the grooves 503 are slid on first base seats 403 of the frame, and the bottom surfaces of the cutout parts 505 are slid on second base seats 404 of the frame. It is thus possible to eliminate inclining of the Oldham's coupling, and it is also possible to prevent abrasion, scuffing, contact noise between the key-shaped projections and the key grooves.

Matsunaga, Mutsunori
Tamura, Takahiro
Sakurai, Kazuo
Application Number:
Publication Date:
February 09, 2004
Filing Date:
January 28, 1997
Export Citation:
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International Classes:
F04C29/00; F01C17/06; F04C18/02; (IPC1-7): F04C18/02
Attorney, Agent or Firm: