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:
Sep. 03, 1991
Filed:
May. 10, 1990
Roland Blanz, Heiligkreuzsteinach, DE;
Grau GmbH, , DE;
Abstract
A switch valve (1) connectable on the inlet side to a levelling valve (18) via control line (20) and also electrically activatable, which the positions raise, lower, drive and stop, possesses, on a housing (2), a supply connection (14) for a compressed-air source, an outlet (10) and at least one connection piece (11) for connection to a pneumatic-spring bellows (13), a slide (6) and a hollow double-valve body (24) being switchable in the housing (2) into the four positions via two switch pistons (4, 5) and two solenoid valves (37, 38) preceding these, and an inlet valve (24, 26,) an outlet valve (31, 35;32, 35, etc.) and a shutoff valve (27, 30) for the respective connection and isolation of the lines thereby being formed in the four positions. The hollow double-valve body (24) has a connection piece (21) located on the end face and intended for the control line (20) brought up from the levelling valve (18). The supply connection (14) for the compressed-air source and the conection piece (11) for connection to the pneumatic-spring bellows (13) are arranged between the connection piece (21) located on the end face and the outlet (10).