Check valve
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United States of America Patent
Stats
-
Jul 20, 1982
Grant Date -
N/A
app pub date -
Aug 28, 1980
filing date -
Aug 28, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A ball check valve having a body with a through passageway having an internally restrictive frustoconical seat is provided with a frustoconical metallic backup member having a different cone angle than the seat and a large diameter ball having a maximum diameter greater than the maximum diameter of the backup member, the backup member having a contoured large diameter axial end face for receipt of a portion of the ball such that a seal is provided between the seat and the ball and between the backup member and the seat and means urging the ball against the backup member large diameter axial end and the backup member against the seat.
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