Hydraulic suspension with a lock-out mechanism for an...

Details Hydraulic suspension with a lock-out mechanism for an... Hydraulic suspension with a lock-out mechanism for an...

2008-05-27

2008-05-27

Fleming, Faye M. (Department: 3616)

Land vehicles

Suspension modification enacted during travel

Riding or suspension height

Reexamination Certificate

active

07377523

ABSTRACT:
A vehicle has an axle connected to a frame by at least one hydraulic cylinder with two chambers separated by a piston. A hydraulic circuit controls flow of fluid between two cylinder chambers and between the chambers and an accumulator to dampen motion of the frame relative to the axle. The hydraulic circuit includes a control valve and a pair of check valves arranged so that the single control valve is able to lock-out the cylinder to emulate a rigid connection of the frame to the axle, as needed.

REFERENCES:
patent: 5865453 (1999-02-01), Harada et al.
patent: 6249728 (2001-06-01), Streiter
patent: 6394238 (2002-05-01), Rogala
patent: 6575484 (2003-06-01), Rogala et al.
patent: 6578855 (2003-06-01), Wallestad
patent: 6612375 (2003-09-01), Rogala
patent: 7089734 (2006-08-01), Cook et al.

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