Valve actuating apparatus and method

Fluid handling – Processes

Patent

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Details

74531, 92 23, 251 634, 251 636, 251 77, 251297, F17D 300, F16K 31122

Patent

active

043723330

ABSTRACT:
A fluid pressure actuator is moved in one direction by fluid pressure and returned in the other direction by a compressed spring. With the method and apparatus embodied in the disclosure, a plurality of additional energy storage storing devices are compressed by only the initial movement of the actuator in response to the application of fluid pressure thereto. Such energy is applied to the energy storage devices by an annular cam surface provided on the actuator shaft. During the return movement of the actuator, the stored energy is returned in the form of an additional axial force applied to the actuator shaft just prior to its return to its original position. When such actuator is applied to a valve, the additional force imparted to the shaft by the energy storing devices may be designed to cause the severing of a wire line trapped in the opening of the valve at the instant that closing of the valve is required.

REFERENCES:
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patent: 2733729 (1956-02-01), Wolfe
patent: 3040772 (1962-06-01), Todd
patent: 3429550 (1969-02-01), Grove
patent: 3737603 (1973-06-01), Kish et al.
patent: 3986701 (1976-10-01), Hopkins
patent: 4073466 (1978-02-01), Snyder
patent: 4309022 (1982-01-01), Reinicke et al.
patent: 4342335 (1982-08-01), Reinicke et al.

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