Range switching device

Details Range switching device Range switching device

2011-06-07

2011-06-07

Le, David D (Department: 3655)

Machine element or mechanism

Gearing

Interchangeably locked

Reexamination Certificate

active

07954394

ABSTRACT:
A parking switching valve includes a spool that is movable to a first position and to a second position. The parking switching valve also has an oil chamber that generates a biasing force from a difference in the pressure receiving area between the land portions of the spool. The oil chamber has a second input port to which a line pressure is input while the spool is in the second position. Because the line pressure is input to the second input port, a biasing force is generated so that the spool is held in the second position against a spring. As a result, a parking device is held in a parking release state.

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patent: 5052247 (1991-10-01), Kato et al.
patent: 5492509 (1996-02-01), Goates
patent: 5851164 (1998-12-01), Habuchi et al.
patent: 6527670 (2003-03-01), Gierer et al.
patent: 1-502444 (1989-08-01), None
patent: 6-221422 (1994-08-01), None
patent: 9-280367 (1997-10-01), None
patent: 2002-533631 (2002-10-01), None

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