Title:
PISTON FOR AUTOMATIC SPEED CHANGER
Document Type and Number:
WIPO Patent Application WO/2005/111477
Kind Code:
A1
Abstract:
A piston (26) for an automatic speed changer, the piston being made by pressing, and having a hollow-cylindrical section (28) and a bottom section (30) provided on one end side of the hollow-cylindrical section (28). A part of the hollow-cylindrical section (28) is cut and bent up radially outward to form a claw section (52) engaging with a projection section (56) provided on a case (12). Since the claw section (52) as a rotation prevention structure is formed by cutting and bending a part of the hollow-cylindrical section (28), the material size of the piston (26) is not necessary to be large to provide the claw section (52). As a result, despite the piston (26) having the rotation prevention structure, it can be produced at low cost.
Inventors:
ONISHI HIROFUMI (JP)
YASUDA YUJI (JP)
YASUDA YUJI (JP)
Application Number:
PCT/JP2005/009207
Publication Date:
November 24, 2005
Filing Date:
May 13, 2005
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
ONISHI HIROFUMI (JP)
YASUDA YUJI (JP)
ONISHI HIROFUMI (JP)
YASUDA YUJI (JP)
International Classes:
F16D25/06; F16D25/0638; F16D65/18; F16H63/30; (IPC1-7): F16H63/30; F16D25/0638; F16D65/20
Foreign References:
| JPH05263839A | 1993-10-12 | |||
| JPH05106645A | 1993-04-27 | |||
| JPH11193830A | 1999-07-21 | |||
| JP2002250364A | 2002-09-06 |
Attorney, Agent or Firm:
Ikeda, Haruyuki (Nagoya-Dia. Bldg. No.2 15-1, Meieki 3-chome,
Nakamura-ku, Nagoya-sh, Aichi 02, JP)
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