Check valve

Details Check valve Check valve

1982-11-15

1984-03-20

Michalsky, Gerald A.

Fluid handling

Larner-johnson type valves; i.e., telescoping internal valve...

Line condition change responsive

1374846, 1375123, 1376142, 13761421, F16K 1730

Patent

active

044374852

ABSTRACT:
A check valve (10) for checking reverse flow as well as excessive forward flow includes a housing (15) and a pair of valve elements (20 and 25) which are operated by flow over both inner and outer faces thereof. A first of the valve elements (20) is unseated by normal forward flow and is seated (checked) by reverse flow through the valve. The other valve element (25) is unseated by reverse flow, allowing such flow to reach the first valve element for the seating thereof.

REFERENCES:
patent: 922578 (1909-05-01), Gries
patent: 2071969 (1937-02-01), Diescher
patent: 2404924 (1946-07-01), Sacchini
patent: 3380469 (1968-04-01), Salerno et al.
patent: 3587622 (1971-06-01), Hardison
patent: 3993093 (1976-11-01), Mokveld
patent: 4373544 (1973-02-01), Goodman et al.

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