Transmission shift rod interlock system

Details Transmission shift rod interlock system Transmission shift rod interlock system

1983-08-29

1985-07-30

Herrmann, Allan D.

Machine element or mechanism

Control lever and linkage systems

Multiple controlled elements

74346, 74364, 92 27, 92 30, 192 3N, G05G 506, F15B 1526

Patent

active

045314225

ABSTRACT:
A shift rod air interlock system provides a mechanical apparatus for insuring a neutral position in a two-speed air shifted compound transmission whenever air to an auxiliary air shift cylinder is interrupted. The apparatus prevents the transmission from being shifted into gear whenever an associated vehicle is stationary and when a power take-off unit is operative. In addition, a two-position air interlock plunger assembly provides a locking plunger which interfaces with a pair of detents in the shift rod, thus insuring that the auxiliary transmission is prevented from being shifted into neutral whenever the air system is interrupted while the vehicle is moving. In a preferred form, the invention utilizes a shift rod selectively movable between at least three positions, including an intermediate neutral position.

REFERENCES:
patent: 2167790 (1939-08-01), Whitehead et al.
patent: 2193431 (1940-03-01), Probst
patent: 2402842 (1946-06-01), Rhodes
patent: 2445716 (1948-07-01), Sternberg
patent: 2529393 (1950-11-01), Hogue
patent: 2828642 (1958-04-01), Bernard
patent: 2902873 (1959-09-01), Sundt
patent: 3033171 (1962-05-01), Engelbrecht et al.

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