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:
Jul. 14, 1998
Filed:
Mar. 26, 1997
Manfred Kaub, Rhens, DE;
Abstract
A valve assembly (10) for controlling a pneumatic brake booster comprises a valve housing (16) with a first and a second valve seat (18, 20) as well as with a valve body (26) adapted to be applied to both valve seats (18, 20). In one position of an operating member (24) the valve body (26) is lifted off the first valve seat (18) only, while in another position of the operating member (24) it is lifted off the second valve seat (20). Radially outside the valve housing (16) an annular third valve seat (64) and a control sleeve (60) surrounding the valve housing are arranged, which as an additional valve body can be axially moved by means of the operating member (24) relative to the valve housing (16). Upon an actuation of the operating member (24) which goes beyond the movement required for lifting the valve body (26) off the second valve seat (20), a venting channel formed by a ring (70) which at least partially surrounds the valve RSLM housing (16) is opened, is arranged on the valve housing (16) at an axial distance from the control sleeve (60) and comprises a hollow space (74) with an inlet (78) connected with an air supply (76) and an outlet (80). A valve assembly (10) of such a design can be manufactured more economically without functional disadvantages.