Check valve

Details Check valve Check valve

2005-07-12

2005-07-12

Michalsky, Gerald A. (Department: 3753)

Fluid handling

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

Line condition change responsive

C137S538000

Reexamination Certificate

active

06915813

ABSTRACT:
A check valve including an outer body having a cylindrical inner bore and a shuttle within the inner bore which is arranged with an upstream, middle and downstream portion that each engage with a sliding fit the inner bore of the outer body being such that, when in a closed position, the middle portion engages with a flexible seal a sealing engagement the inner bore and when in an open position it is arranged that the liquid will flow through a passage around the middle portion which passage includes at the least a path through the outer body.

REFERENCES:
patent: 502252 (1893-07-01), Hanna
patent: 2206356 (1940-07-01), Hutchings
patent: 2538364 (1951-01-01), James et al.
patent: 2633147 (1953-03-01), Badami
patent: 2928417 (1960-03-01), Buckner et al.
patent: 2960998 (1960-11-01), Sinker et al.
patent: 3565100 (1971-02-01), Pfleger
patent: 3943969 (1976-03-01), Rubin et al.
International Search Report for PCT/AU02/01336.
International Preliminary Examination Report for PCT/AU02/01336.

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