Expansible chamber devices – Relatively movable working members – First working member moves second coaxial working member...
Patent
1991-01-29
1992-06-30
Denion, Thomas E.
Expansible chamber devices
Relatively movable working members
First working member moves second coaxial working member...
92 75, 92131, 92135, 74364, F01B 700
Patent
active
051253267
ABSTRACT:
A three position actuator which is used to position the gear range control lever on a two speed transfer case. Three positions are required to achieve HIGH, LOW and NEUTRAL. Two individual air chambers may be selectively charged with compressed air to move two pistons along a common actuator rod to achieve linear translation of the control lever to selectively position the transfer case in HIGH, NEUTRAL or LOW range. The transfer case is shifted from LOW to NEUTRAL or HIGH to NEUTRAL by releasing the respective charge of compressed air thereby permitting a spring to shift the control lever to neutral. Thus, in the event of a failure of the system supplying the compressed air, the actuator will return the transfer case to NEUTRAL as required for towing.
REFERENCES:
patent: 2299211 (1942-10-01), Clench
patent: 2438390 (1948-03-01), Eroson
patent: 2575982 (1951-11-01), Stevens
patent: 3469503 (1969-09-01), Adler et al.
patent: 3958493 (1976-05-01), Fujita et al.
patent: 4033233 (1977-07-01), Toi
patent: 4125059 (1978-11-01), Tuji
patent: 4205594 (1980-06-01), Burke
Denion Thomas E.
Rockwell International Corporation
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