Double-flow butterfly valve part

Details Double-flow butterfly valve part Double-flow butterfly valve part

1989-02-17

1989-10-03

Hepperle, Stephen M.

Fluid handling

Systems

Plural noncommunicating flow paths

1376302, 261 413, F02D 902, F02M 1102

Patent

active

048709905

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).

REFERENCES:
patent: 2790631 (1957-04-01), Carlson et al.
patent: 3259376 (1966-07-01), Baer
patent: 3390921 (1968-07-01), Klimek
patent: 3913621 (1975-10-01), Damratowski
patent: 4393827 (1983-07-01), Schmid

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