Coupling with heat fusible actuator member

Details Coupling with heat fusible actuator member Coupling with heat fusible actuator member

1990-04-20

1991-07-02

Fox, John C.

Fluid handling

Destructible or deformable element controlled

Heat destructible or fusible

137 75, 2511496, F16L 3728

Patent

active

050278452

ABSTRACT:
As a coupling is connected, an improved heat fusible actuator member in a plug assembly moves a value member in a socket assembly from a closed position to an open position against the influence of a biasing spring. When the coupling is exposed to excessive heat, the one piece actuator member fuses and is deformed under the influence of force applied against the actuator member by the valve member to enable the valve member to close. In one embodiment, the actuator member includes a cylindrical sleeve which is resiliently compressible to enable retaining lugs on an inner end of the sleeve to engage in an annular retaining surface on a metal plug body. At the same time, an annular rim on an outer end of the sleeve engages a circular outer end surface of the plug body. A bridging member extends across the fluid passage through the sleeve and is engaged by the valve member. In another embodiment, the annular rim is omitted and retaining lugs engage in an annular groove inside the plug body to hold the actuator member against axial movement.

REFERENCES:
patent: 2048387 (1936-07-01), Johnsen
patent: 2048388 (1936-07-01), Johnsen
patent: 2048389 (1936-07-01), Johnsen
patent: 3245423 (1966-04-01), Hansen et al.
patent: 3532101 (1967-09-01), Snyder, Jr.
patent: 4792115 (1988-12-01), Jindra et al.

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