Land vehicles – Skates – Ball type roller skates
Patent
1991-04-11
1993-01-05
Focarino, Margaret A.
Land vehicles
Skates
Ball type roller skates
280714, 137102, 1376275, B60G 1126
Patent
active
051764040
ABSTRACT:
A level control valve for automatically keeping constant the vehicle height of a commercial vehicle with air suspension has a spring-loaded double valve body 22, an inlet seat 24 on the housing 2 and a hollow valve tappet 11 which bears an outlet seat 25 for the double valve body 22, is displaceable in a sealing manner, and the position of which relative to the housing 2 can be changed via an adjustment drive which senses the vehicle height. There is at least one port 6, provided on the housing 2, for a line 7 leading to an air suspension bellows 8 and a port 3 for a storage line 4 leading to the inlet valve 22, 24. The level control valve 1 has a shutoff and outlet valve 36, which can be controlled arbitrarily and independently of the adjustment drive and is of large cross-section, for the rapid lowering of the vehicle structure. For each line 7 leading to an air suspension bellows 8, a bypass line 45 is provided which leads from said line 7 to the shutoff and outlet valve 36 of large cross-section, in which bypass line there is arranged a non-return valve 46 which opens in the direction of the shutoff and outlet valve 36.
REFERENCES:
patent: 3087743 (1963-04-01), Behles
patent: 4809957 (1989-03-01), Schonfeld et al.
Focarino Margaret A.
Grau GmbH
Graysay Tamara L.
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