Coupling device

Details Coupling device Coupling device

1990-06-08

1991-02-05

Chambers, A. Michael

Valves and valve actuation

With correlated flow path

Valve operated by joining flow path sections

137116, 137312, F16L 3728

Patent

active

049898310

ABSTRACT:
A coupling device includes a first coupling section having a large bore, a small bore, and a valve seat between the large and small bores; a second coupling section having a second bore opening at a contact surface which is opposed to the first coupling section; a valve having a valve head normally resting on the valve seat and a tubular body snugly fitted in the small bore and having an axial opening with a mouth at an end and a plurality of radial openings at the other end; a drain passage provided along the small bore and having an end opening at a bottom of the large bore and the other end opening at a lower side of the first coupling section; and a drain valve provided in the drain passage and having a cylindrical hole intersecting the drain passage and a piston snugly fitted in the cylindrical hole and having a circumferential channel for opening the drain passage and a land portion for closing the drain passage.

REFERENCES:
patent: 2265267 (1941-12-01), Cowles
patent: 2680447 (1954-06-01), Groves
patent: 2787127 (1957-04-01), Benz
patent: 3777771 (1973-12-01), De Visscher
patent: 4408521 (1983-10-01), Schelli et al.
patent: 4614201 (1986-09-01), King et al.

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