Fluidic actuator for a switching device

Details Fluidic actuator for a switching device Fluidic actuator for a switching device

1978-03-17

1980-08-12

Tolin, Gerald P.

Electricity: circuit makers and breakers

Fluid pressure

Flow-responsive type

91 47, 200835, H01H 3540

Patent

active

042174716

ABSTRACT:
A fluidic actuator includes a retainer block having an internal regulating passage and air inlet and outlet passages interiorly connected to the regulating passage. Obstruction means, preferably a needle valve, partially obstruct the regulating passage, thereby causing a reduction in the pressure of air flowing therethrough. There is a backpressure passage within the needle valve, and this backpressure passage joins the retainer block outlet passage with a sensing cavity. The sensing cavity is covered by a diaphragm which supports a pusher. The air outlet passage is connected to an exit line, and when the end of the exit line is in any manner occluded, a backpressure condition is created within the actuator. This backpressure condition produces movement of the diaphragm, and the diaphragm in turn urges the pusher against a mechanically operated switch. A magnetic insert provides a latching capability.

REFERENCES:
patent: 3349801 (1967-10-01), Grundmann
patent: 3739190 (1973-06-01), Whitsel
patent: 4118612 (1978-10-01), Gabus

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