Hydraulic pump and actuator for parallel auxiliary leaf spring

Details Hydraulic pump and actuator for parallel auxiliary leaf spring Hydraulic pump and actuator for parallel auxiliary leaf spring

1989-12-26

1991-01-08

Rice, Kenneth R.

Land vehicles

Wheeled

Running gear

280714, 280715, 280DIG1, B60G 1700

Patent

active

049829726

ABSTRACT:
Selectively engagable auxiliary leaf springs (38 or 138) for vertically supporting a vehicle chassis (32) on an axle assembly (22 or 102) in parallel with main suspension springs (34 or 114). In three of the disclosed embodiments, both ends (38b,38a) of the auxiliary springs (38) are pivotally atached. In two other embodiments, one end (138a) of the auxiliary leaf springs (142) is pivotally attached and the other end (138b) is rigidly affixed in cantilever fashion. Actuators (56 or 142) are employed to selectively enable or increase load supporting of the auxiliary leaf springs. One of the actuators is a hydraulic actuator (142) which receives pressurized fluid from a pump (148) driven by jounce of the axle assembly (22 or 102).

REFERENCES:
patent: 2998970 (1961-09-01), Davis
patent: 3021153 (1962-02-01), Dickinson
patent: 3092397 (1963-06-01), Dullabaun et al.
patent: 3094341 (1963-06-01), Alfieri
patent: 3199928 (1965-08-01), Chouings
patent: 3484091 (1969-12-01), Draves
patent: 4089544 (1978-05-01), Raidel

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