Title:
FLUID MACHINE
Document Type and Number:
WIPO Patent Application WO/2007/142198
Kind Code:
A1
Abstract:
A reciprocating fluid machine (2) in which a piston (32) is reciprocated in a cylinder
bore (40). The side surface (32a) of the piston includes a cylindrical surface
part (64) slidingly contacting with the cylinder bore through a cover layer (66),
a ring groove part (68) fitted to a piston ring (34), and a tapered surface part
(70) which is formed between the cylindrical surface part and the ring groove
part, and so tilted from the cylindrical surface part toward the ring groove part
as to be separated from the cylinder bore. The cover layer is so formed on the tapered
surface part as to be separated from the cylinder bore.
Inventors:
UCHIKADO IWAO (JP)
Application Number:
PCT/JP2007/061302
Publication Date:
December 13, 2007
Filing Date:
June 04, 2007
Export Citation:
Assignee:
SANDEN CORP (JP)
UCHIKADO IWAO (JP)
UCHIKADO IWAO (JP)
International Classes:
F04B27/08; F04B39/00
Foreign References:
| JPH10169557A | 1998-06-23 | |||
| JPS5430519A | 1979-03-07 | |||
| JPS63123781U | 1988-08-11 | |||
| JPH11201038A | 1999-07-27 | |||
| JPS5795484U | 1982-06-11 | |||
| JPH10169557A | 1998-06-23 |
Other References:
See also references of EP 2025935A4
Attorney, Agent or Firm:
NAGATO, Kanji (8-1 Shinbashi 5-chome,Minato-k, Tokyo 04, JP)
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