Dual force fluid actuated shift device

Details Dual force fluid actuated shift device Dual force fluid actuated shift device

1992-07-23

1993-03-09

Wright, Dirk

Machine element or mechanism

Gearing

Interchangeably locked

B60K 2010

Patent

active

051918048

ABSTRACT:
A fluid operated shift actuator (11) is provided, and is especially suited for use in an X-Y shift mechanism for a change-gear mechanical transmission. The shift actuator includes a piston rod (47), a piston member (87), and a pair of auxiliary pistons (93 and 95), to define fluid pressure chambers (91 and 92). After the piston member (87) and the piston rod (47) have been displaced from neutral in either direction, into a gear engagement position, pressurizing both fluid pressure chambers (91 and 92) will cause the actuator to return to the neutral position (gear disengagement) with substantially less force than that exerted when the actuator moved into the gear engagement position.

REFERENCES:
patent: 4445393 (1984-05-01), Braun
patent: 4796485 (1989-01-01), Ebina
patent: 4899607 (1990-02-01), Stainton
patent: 4928544 (1990-05-01), Markyvech et al.

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