Suspension override system

Details Suspension override system Suspension override system

1979-04-13

1982-06-22

Peters, Jr., Joseph F.

Land vehicles

Wheeled

Running gear

267 6428, 280 6R;714, B60G 1126

Patent

active

043359019

ABSTRACT:
The present invention provides a system for overriding the prior art automatic levelling system for vehicles riding on fluid suspensions such as air bags. Such systems utilize a link extending between the vehicle axle and a regulating valve whereby the valve is responsive to vertical axle movement to alter the pressurization of the air bags and hence the clearance height between the vehicle bed and the axle. In the present invention the link is replaced by a cylinder and piston actuator which is connected to a master control via a conduit. An incompressible fluid fills the actuator chamber, the conduit and the master control chamber. The master control chamber may be varied in volume to produce a corresponding change, via the fluid, in the actuator chamber resulting in relative movement between the actuator cylinder and piston and hence operation of the regulating valve. By appropriately operating the master control it is possible to selectively effect pressurization or bleeding of the air bags to raise or lower the vehicle bed and hence achieve a desired elevation of the vehicle bed relative to a reference elevation. The invention permits rapid adjustment of the vehicle bed elevation to bring it parallel to, for example, the loading dock of a warehouse to speed the loading or unloading process.

REFERENCES:
patent: 3104679 (1963-09-01), Gouirand
patent: 3183014 (1965-05-01), Doomernik
patent: 3836166 (1974-09-01), Bainbridge
patent: 3895816 (1975-07-01), Takahashi
patent: 3917295 (1975-11-01), Hiruma
patent: 3970327 (1976-07-01), Dezelan
patent: 4033423 (1977-07-01), Grosseau
patent: 4105216 (1978-08-01), Graham
patent: 4162083 (1979-07-01), Zabler
patent: 4185845 (1980-01-01), Misch

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