Method for making seat assembly for butterfly valves

Details Method for making seat assembly for butterfly valves Method for making seat assembly for butterfly valves

1978-12-01

1980-09-23

Crane, Daniel C.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

264248, 264263, 264275, 251306, B23P 1500, B29C 600

Patent

active

042234301

ABSTRACT:
A method of making an improved seat assembly for a butterfly valve. The seat assembly comprises a flexible, circular metal band embedded in a resilient material to form an annular seat assembly. The assembly is made by supporting the band in a fixed spatial position on movable finger members, positioning a mold about, but spaced from, the band, and molding the annular seat assembly in the mold to embed the band. The invention is also directed toward an improved seat assembly. In a preferred embodiment the circular band is made of two curved sections overlapping at the two joints and having diametrically opposite holes in the two overlapping areas.

REFERENCES:
patent: 1149702 (1915-08-01), Vail
patent: 1271070 (1918-07-01), Palecheck
patent: 3490122 (1970-01-01), Hunder et al.
patent: 3567180 (1971-03-01), Williams
patent: 3675888 (1972-07-01), Scaramucci
patent: 3940108 (1976-02-01), Edwards

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