Land vehicles – Wheeled – Running gear
Patent
1994-12-29
1996-08-27
Culbreth, Eric D.
Land vehicles
Wheeled
Running gear
180209, 280 4323, B60G 1126
Patent
active
055493220
ABSTRACT:
The present invention provides an under-frame lift axle assembly for a vehicle, particularly an off-road vehicle, which includes a suspension lower link element having one end mounted to the frame of said vehicle by a first pivotal joint, an axle assembly, adapted to mount a wheel and tire thereon, distal to said first pivotal joint, and a second pivotal joint, permitting articulation of the lower link, medially located on said suspension lower link element, a retractable suspension assembly, such as an air bag suspension assembly, mounted between said frame and the suspension lower link element intermediate to said first pivotable joint and said second pivotal joint, an upper link member to limit or prevent articulation of said suspension lower link element at said medial second pivotal joint when said suspension assembly is deployed to bear a share of the vehicle weight, a lift device , such as a second air bag assembly or the like, to lift said suspension link element and said axle assembly away from ground contact by pivoting said suspension link element relative to said frame about said first pivotal joint and to retract said retractable suspension assembly combined with cylinder, to articulate the suspension link element at the medial second medial pivotal joint when the link element is lifted to move the axle assembly farther from ground contact than provided by the lift device.
REFERENCES:
patent: 4660842 (1987-04-01), Watt et al.
patent: 4705133 (1987-11-01), Christenson et al.
patent: 5018593 (1991-05-01), Hermann
patent: 5230528 (1993-07-01), Van Raden et al.
patent: 5403031 (1995-04-01), Gottschalk et al.
Ashford Concrete, Inc.
Culbreth Eric D.
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