Double-flow butterfly valve part

US4870990A · kind A · utility

Assignee

• AUDI AG · DE

Inventors

• Rudolf Bierling · Schwaigern, DE
• Max Ruf · Obereisesheim, DE
• Wilhelm Hannibal · Neckarsulm, DE

Key dates

• Filing date: Feb 17, 1989
• Grant date: Oct 3, 1989
• Expiry date: Feb 17, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/87161
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

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).