The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 05, 1993
Filed:
Apr. 11, 1991
Jercy Sulzyc, Eppelheim, DE;
Grau GmbH, Heidelberg, DE;
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.