Electricity: circuit makers and breakers – Fluid pressure – Diaphragm
Reexamination Certificate
2005-03-15
2005-03-15
Friedhofer, Michael A. (Department: 2832)
Electricity: circuit makers and breakers
Fluid pressure
Diaphragm
Reexamination Certificate
active
06867383
ABSTRACT:
A liquid level assembly for controlling liquid level has a switching mechanism responsive to the liquid head to activate a pump. A housing assembly has an internal cavity in which the switching mechanism is supported, the housing assembly having an open end sealed by a diaphragm seal having a flexible planar portion that transmits head pressure to the switching mechanism. The diaphragm seal also has a peripheral web portion and a flexible bellows portion connecting the flexible planar portion and the peripheral web portion. The peripheral web portion has a peripheral sealing bead that is sealingly compressed against a groove in the housing assembly, and a plurality of knob members extend from the peripheral web to press against the switching assembly, thereby accommodating manufacturing dimensional tolerances of the switching mechanism.
REFERENCES:
patent: 4038506 (1977-07-01), Filip
patent: 4192192 (1980-03-01), Schnell
patent: 4260862 (1981-04-01), Orcutt
patent: 4885983 (1989-12-01), Zavoda
patent: 5062455 (1991-11-01), Schurter et al.
patent: 5073149 (1991-12-01), Maruyama et al.
patent: 5115724 (1992-05-01), Zavoda
patent: 5125228 (1992-06-01), Jewess et al.
patent: 5471022 (1995-11-01), Kiss et al.
patent: 5661278 (1997-08-01), Atkinson et al.
patent: 5667060 (1997-09-01), Luzzi
patent: 5672049 (1997-09-01), Ciurlo
patent: 5744770 (1998-04-01), Moessinger et al.
patent: 6120033 (2000-09-01), Filippi et al.
patent: 6244457 (2001-06-01), Piotrowski et al.
patent: 6484555 (2002-11-01), Perry et al.
Fellers , Snider, et al.
Friedhofer Michael A.
Little Giant Pump Company
McCarthy Bill D.
LandOfFree
Liquid level assembly with diaphragm seal 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 assembly with diaphragm seal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid level assembly with diaphragm seal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3391389