Pressure switch with reduced contact wear

Details Pressure switch with reduced contact wear Pressure switch with reduced contact wear

1989-03-23

1990-06-12

Tolin, Gerald P.

Electricity: circuit makers and breakers

Fluid pressure

Diaphragm

200 83S, H01H 3534

Patent

active

049335170

ABSTRACT:
An integral housing and body case contain a diaphragm having one side exposed to an external signal pressure and another side exposed to a chamber in the integral housing and body case so that the diaphragm is able to flex in response to a pressure differential between the sides thereof. A rod in the integral housing and body case is movable in response to the flexure of the diaphragm and loosely carries a movable contact which can engage at least one fixed contact in the integral housing and body case. A first spring biases the movable contact toward the at least one fixed contact so that when the rod is moved by a signal pressure, the resulting movement of the movable contact causes the movable contact to engage with the fixed contact and be maintained thereagainst by only the force of the first spring.

REFERENCES:
patent: 3963887 (1976-06-01), Takusagawa
patent: 4038506 (1977-07-01), Filip
patent: 4644116 (1987-02-01), Miyakawa
patent: 4767898 (1988-08-01), Yasuda

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