Pivotal closing member

Details Pivotal closing member Pivotal closing member

1984-11-05

1986-12-02

Weakley, Harold W.

Valves and valve actuation

Rotary valves

Butterfly

251337, 267155, F16K 11052

Patent

active

046259430

ABSTRACT:
A throttle valve for regulating the introduction of a fuel-air mixture into an internal-combustion engine is provided with a return spring system. The return spring system includes a first coiled spring, a second coiled spring, a hat-shaped bushing for separating the two spring coils and a lever, fixed in relation to a throttle valve housing, for simultaneously loading both spring coils to yieldably urge the throttle valve toward a normal position. The return spring system is positioned at one end of a shaft on which the throttle valve is mounted and operates to yieldably rotate the shaft in a selected direction to orient the throttle valve.

REFERENCES:
patent: Re22030 (1942-02-01), Boller
patent: 2815916 (1957-12-01), Holmes et al.
patent: 3395727 (1968-08-01), Weise et al.
patent: 3606980 (1971-09-01), Simpson
patent: 3996961 (1976-12-01), Siegwart
patent: 4285676 (1981-08-01), Kraft
patent: 4301823 (1981-11-01), Meisenheimer, Jr.

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