Spring devices – Vehicle – Comprising compressible fluid
Patent
1996-07-30
1998-10-13
Graham, Matthew C.
Spring devices
Vehicle
Comprising compressible fluid
264DIG1, 188195, F16F 500, F16F 900
Patent
active
058201122
ABSTRACT:
A vehicle cab levelling apparatus includes a spool formed extendedly from the piston so as to shut the exhaustion valve by closely attaching thereto and to open the exhaustion valve by distancing therefrom in accordance with the upward and downward movement of the piston, a slider valve provided on the periphery of the spool so as to move upwardly and downwardly along the axis of the spool, shutting or opening the discharge passage, and a valve operation member for operating in accordance with the upward and downward movement of the lever, and shutting the discharge passages by shifting the slider valve in accordance with supplying an externally provided air into an operation chamber formed by the slider valve. The valve apparatus enables reducing power loss by preventing an undesired exhaustion of the compressed air at a vehicle travelling stage wherein the upward and downward movement occurs fastly and constantly, by providing a slider valve for blocking discharge passages and a slider valve member for forming an air pressure so as to operate the slider valve, thereby reducing the loss of the compressed air serving as a braking source and thus maintaining a sufficient brake pressure, whereby a strong brake force can be obtained, and the passengers as well as the driver can enjoy a quieter and more comfortable driving.
REFERENCES:
patent: 2959426 (1960-11-01), Augustin
patent: 3208760 (1965-09-01), Lucien et al.
patent: 5050849 (1991-09-01), Takagi
patent: 5077656 (1991-12-01), Waldron et al.
Graham Matthew C.
Hyundai Motor Company
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