Electro-mechanical shifter for hydraulic transmission

Details Electro-mechanical shifter for hydraulic transmission Electro-mechanical shifter for hydraulic transmission

1985-03-21

1986-10-07

Staab, Lawrence

192 clutches and power-stop control

Transmission control and clutch control

Common control

192 362, 74867, 74473R, B60K 4122

Patent

active

046154213

ABSTRACT:
An electro-mechanical shifter (80) for use with a hydraulic transmission (62) of the type employing a clutch and having first and second valve members (C, D) that in the same and opposite open and closed conditions provide at least one range of gear ratios for driving an output member such as an engine drive shaft (64). Shifter (80) includes a control arm (9) positionable by an operator along a frame (10) that includes a pin (24) operated by an actuator (32) which extends into an arcuate cam opening (22) in frame (10) operative to prevent arm (9) from being moved from a highest gear ratio of a first range of gear ratios beyond a lowest gear ratio of a second range of gear ratios without disengagement of the clutch.

REFERENCES:
patent: 2892358 (1959-06-01), Backus et al.
patent: 3570636 (1971-03-01), Franz et al.
patent: 3805640 (1974-04-01), Schneider et al.
patent: 4015488 (1977-04-01), Akeson et al.
patent: 4034627 (1977-07-01), Mizote
patent: 4338832 (1982-07-01), Pelligrino
patent: 4373619 (1983-02-01), Schritt et al.
patent: 4388843 (1983-06-01), Teeter
patent: 4442730 (1984-04-01), Snoy
patent: 4476748 (1984-10-01), Morscheck
patent: 4519266 (1985-05-01), Reinecke

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