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:
Oct. 03, 1989
Filed:
Feb. 17, 1989
Audi AG, Neckarsulm, DE;
Abstract
A double-flow butterfly valve part (1) contains two butterfly valves (4 and 6), which are connected together by means of a coupling element (10). The second butterfly valve (6) is opened only when the first butterfly valve (4) is moved beyond a partially open position into the completely open position. To make it possible to shift the two butterfly valves (4 and 6) back by means of a single restoring spring acting on the first butterfly valve (4), a desmodromic control is provided between the coupling element (10) and the second butterfly valve (6). For this purpose, a lever (9) is disposed on the shaft (7) of the second butterfly valve (6). This lever (9) contains an arched slot (12), which is engaged by a roller (13) mounted in the coupling element (10). The coupling element (10), in turn, is provided with an arched slot (14), which is engaged by a roller (15) mounted in the lever (9).