Latching fluid level switch

Details Latching fluid level switch Latching fluid level switch

2005-03-08

2005-03-08

Friedhofer, Michael A. (Department: 2832)

Electricity: circuit makers and breakers

Float

Float and pressure

Reexamination Certificate

active

06864445

ABSTRACT:
A latching fluid level switch which includes an elongated shaft member having a lower end and an opposite upper end with both ends containing a buoyant float member. The upper end is pivotally anchored to a tank wall and capable of having its lower end being moved between two distinct angular positions depending on the level of the liquid in said tank acting on said float member and having a first higher buoyancy angular position representing a high liquid level endpoint, and a second less buoyancy angular position representing a lower liquid level endpoint. The float is maintained at each distinct angular position such that once triggered at one liquid level endpoint the float will maintain and hold that angular position until reversibly triggered at the other liquid level endpoint.

REFERENCES:
patent: 3309687 (1967-03-01), Phipps
patent: 3483342 (1969-12-01), Mauro
patent: 3531767 (1970-09-01), Klein et al.
patent: 4001533 (1977-01-01), Conery et al.
patent: 4539270 (1985-09-01), Mejia
patent: 6326895 (2001-12-01), Hartke et al.
patent: 6748805 (2004-06-01), Lease

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