Pressure-fluid operated limit switch

Details Pressure-fluid operated limit switch Pressure-fluid operated limit switch

1982-12-06

1985-06-25

Rosenthal, Arnold

Valves and valve actuation

With snap action

251239, 251241, 251339, F16K 3152

Patent

active

045249458

ABSTRACT:
A pressure fluid operated limit switch, particularly for a device for controlling an adjusting element in dependence upon a control value and a reference value. The limit switch includes a housing formed with a recess in which a spring-biased valve member is positioned. The valve member normally abuts against a valve seat formed by a shoulder in the switch housing is at times moved away from that seat against the force of the spring in response to a condition of the adjusting element with which the limit switch is mechanically connected. In order to ensure rapid movement of the valve member away from its seat and thus preventing throttling of the pressure fluid when the switch is in its open position the valve member is provided with the actuating element rigidly connected thereto and carrying at its free end an axially slidable sleeve biased by a spring which is clamped between that sleeve and the valve member.

REFERENCES:
patent: 616197 (1898-12-01), Moller
patent: 1173672 (1916-02-01), Macloskie
patent: 2482223 (1949-09-01), Strid et al.

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