VEHICLE SEAT PNEUMOHYDRAULIC SUSPENSION Russian patent published in 2006 - IPC B60N2/52 

FIELD: transport engineering; road vehicles and tractors.

SUBSTANCE: invention relates to suspensions of seats of automobiles and agricultural tractors. Proposed pneumohydraulic suspension of seat contains hydraulic cylinder with fitted-in piston with rod, base of seat connected with said hydraulic cylinder which is coupled with seat framework by means of rod, and main additional hydropneumatic accumulators with pneumatic and hydraulic spaces. Hydraulic spaces of accumulators are connected by main lines with spaces of hydraulic cylinder. Main accumulator communicates with underpiston space, and additional one, with overpiston space. Said space of hydraulic cylinder and their main lines communicate by means of restrictors, receiver and spool device with spool sensing regulator and electronic control system including displacement pickup and vibration pickup installed on seat to respond to route-means-square accelerations.

EFFECT: improved efficiency of damping vertical vibrations of seat in wide amplitude-frequency range.

2 dwg