Spring safety device

Details Spring safety device Spring safety device

1982-01-28

1984-09-04

Maslousky, Paul E.

Expansible chamber devices

With assembly or disassembly facilitating means

92130C, 251 58, F01B 2900, F01B 3100

Patent

active

044690169

ABSTRACT:
A self-contained spring biasing device, particularly useful for providing a movement-resisting force on the power shaft of a valve actuator, comprises spring cartridge means and safety means. The spring cartridge means has therein a compression spring and a bearing plate that is pushed by the power shaft to compress the spring and resist movement of the shaft. The safety means is accessible from the exterior of the spring cartridge means and removably secures the power shaft to the bearing plate, thus preventing the spring from launching the spring cartridge means from the actuator.

REFERENCES:
patent: 3187642 (1965-06-01), Cruse
patent: 3727523 (1973-04-01), Gulick
patent: 3824901 (1974-07-01), Shafer
patent: 3955479 (1976-05-01), McLuckie
patent: 4350081 (1982-09-01), Fry et al.

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