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:
Feb. 25, 1997
Filed:
Sep. 19, 1995
Jurgen Balz, Wiesbaden, DE;
Karlheinz Bill, Dreieich, DE;
Horst Kramer, Dietzenbach, DE;
Peter Drott, Frankfurt am Main, DE;
Jurgen Bauer, Wiesbaden, DE;
Heinz Zingel, Bad Camberg, DE;
Holger Von Havn, Bad Vilbel, DE;
Ralf Harth, Oberursel, DE;
Jurgen Schonlau, Walluf, DE;
Wolfgang Ritter, Oberursel, DE;
ITT Automotive Europe, GmbH, , DE;
Abstract
A vacuum brake power booster for automotive vehicles includes a booster housing whose interior is subdivided into a vacuum chamber and a working chamber by a moveable wall. A control housing carries the moveable wall and accommodates a control valve which controls a pressure differential acting upon the moveable wall. The control valve has at least two sealing seats cooperating with an elastic valve member and is operable by an actuating rod. One of the sealing seats is operable, irrespective of the actuating rod, by an electromagnet whose armature is in force-transmitting interaction with one of the sealing seats. An electrical switching apparatus is also included, the control signals of which influence the current supply of the electromagnet thereby enabling its deactivation. The switching apparatus are operable by a relative movement between a valve piston and the control housing.