Quick coupling hose connection with double acting backflow preve

Details Quick coupling hose connection with double acting backflow preve Quick coupling hose connection with double acting backflow preve

1985-12-11

1987-05-26

Michalsky, Gerald A.

Valves and valve actuation

With correlated flow path

Valve operated by joining flow path sections

137215, 13753325, 251211, F16L 2900

Patent

active

046679251

ABSTRACT:
An instant coupling comprises a male element (9) and a female element (1) which comprises a chamber (4) containing a valve (5) provided with a first sealing surface (10) which, when pressurized water is present, rests against a seat (12) and shuts-off water delivery when the male element (9) is not inserted, and a second sealing surface (11) below the first and arranged to rest against a respective seat (13) under the action of any momentary negative pressure arising in the water feed hose, in order to prevent undesirable fluids being drawn in when the male element is inserted.

REFERENCES:
patent: 2102774 (1937-12-01), Williams
patent: 2833301 (1958-05-01), Argus
patent: 2849208 (1958-08-01), Skipwith
patent: 3532110 (1970-10-01), Peterson
patent: 3961645 (1976-06-01), Kagan
patent: 4208034 (1980-06-01), Ohlsson
patent: 4429906 (1984-02-01), Spadotto et al.

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