Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent
1980-11-17
1982-06-08
Weakley, Harold W.
Valves and valve actuation
With means to increase head and seat contact pressure
With positive reduction
251172, 251301, F16K 2500
Patent
active
043336310
ABSTRACT:
A pipe valve assembly including a housing defining a flow aperture, a valve member for opening and closing the flow aperture, a spring biased valve seat ring for pressing the valve member to seal the aperture, a spring assembly urging the valve seat ring away from its sealing position and a fluid pressure chamber on one side of the spring assembly for receiving fluid pressure to actuate the valve seat ring into its sealing position. The spring assembly in formed with a smaller diameter annular spring member and a larger diameter annular spring member arranged coaxially relative to each other and relative to the valve seat ring with the valve seat ring being attached with an outer edge of the smaller diameter spring member and the inner edge of the larger diameter spring member. The spring assembly is supported in the housing at an inner edge of the smaller diameter spring member and at an outer edge of the larger diameter spring member.
REFERENCES:
patent: 3109457 (1963-11-01), Oliveau
patent: 3266505 (1966-08-01), Kron
patent: 3695300 (1972-10-01), Bradel
patent: 3842861 (1974-10-01), Jandrasi
VAT Aktiengesellschaft fur Vakuum-Apparate-Technik
Weakley Harold W.
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