Electricity: circuit makers and breakers – Float – Float and pressure
Patent
1994-01-18
1995-06-20
Tolin, Gerald P.
Electricity: circuit makers and breakers
Float
Float and pressure
73317, 200 51R, 340625, H01H 3518
Patent
active
054262712
ABSTRACT:
A liquid level sensor is provided with a single piece pivotable device which is used to move a permanent magnet into and out of the detection zone of a magnetically sensitive component, such as a Hall effect element. The pivotable device comprises a buoyant portion, a magnet holding portion and a pivot portion with arms connecting the pivot portion to the buoyant portion and the magnet holding portion. The pivot portion of the pivotable device is shaped to be received over a fixed post attached to a container. The injection gate of the mold used to form the pivotable device is advantageously located so that the pressures throughout the mold cavity are positive to the action of the foaming agent to result in the buoyant portion of the pivotable device having a significantly lower density than the other portions of the pivotable device. This variable density in a single piece device permits a smaller overall size to be used without sacrificing the sensitivity needed to detect changes in a liquid level.
REFERENCES:
patent: 4489224 (1984-12-01), Steer
patent: 4598584 (1986-07-01), Dombrowski
patent: 4864665 (1989-09-01), Toltzman
patent: 4911011 (1990-03-01), Fekete
patent: 4917795 (1990-04-01), Sable et al.
patent: 4920797 (1990-05-01), Swartz
patent: 4952352 (1990-08-01), Shin
patent: 5134729 (1992-08-01), Shaw
patent: 5250768 (1993-10-01), Van Fossen
Article "Molding Masterpieces" by Richard J. Babyak in Nov. 1993 Appliance Manufacturer.
Clark Richard A.
Cummins Brad L.
Erickson Timothy K.
Mc Bride Brian D.
O'Brien Gary R.
Honeywell Inc.
Lanyi William D.
Tolin Gerald P.
LandOfFree
Liquid level sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Liquid level sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid level sensor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1845524