Butterfly valve with cam actuable seat

Valves and valve actuation – With means to increase head and seat contact pressure – Seat pressed to valve

Patent

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Details

251306, 251315, 13761411, F16K 1226

Patent

active

042069033

ABSTRACT:
A cam actuable valve wherein annular seats and a valve closure member are axially insertable into a flow passage bore of a valve body. The valve closure member is supported within the flow passage bore by cylindrical trunnions which are partially inserted into the flow passage bore from the exterior of the valve via laterally extending trunnion bores which intersect the flow passage bore and the exterior of the valve body. Cams are formed on the trunnions by forming recesses along chords of the trunnions, the recesses receiving portions of the annular seats when the valve is closed to permit the seats to engage the valve closure member.

REFERENCES:
patent: 3245653 (1966-04-01), Lavigueur
patent: 3593960 (1971-07-01), Scaramucci
patent: 3746302 (1973-07-01), Larsen
patent: 3776505 (1973-12-01), Nakanishi
patent: 3794291 (1974-02-01), Suyama
patent: 3815869 (1974-06-01), Smith
patent: 3934606 (1976-01-01), Matthews
patent: 4108199 (1978-08-01), Bonafous
patent: 4125128 (1978-11-01), Elward et al.

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