Pump and combination pump and trap with snap-over mechanism and

Details Pump and combination pump and trap with snap-over mechanism and Pump and combination pump and trap with snap-over mechanism and

1995-09-19

1997-08-12

Freay, Charles G.

Pumps

One fluid pumped by contact or entrainment with another

Liquid pumped by supplying or exhausting gaseous motive...

417133, F04F 106

Patent

active

056558880

ABSTRACT:
A combination pump and trap is disclosed which includes a snap-over mechanism useful for small floats with little buoyancy. The snap-over mechanism has a geometry in which the distance between the float or compression arm pivot point and the pivot for the portion of the spring connected to a first arm or toggle link is greater than the distance from the float or compression arm pivot point and the pivot for the portion of the spring connected to the float or compression arm. This geometry allows the magnification of buoyancy by the main arm which is transmitted to the first toggle link to be large and the magnification of buoyancy by the first toggle link which is transmitted to the change-over valve to be large. A trap which is connected to the float arm is also used, which allows a liquid seal to be maintained at the liquid discharge port. A double seal valve with a mechanism for allowing rapid opening of the valve upon movement of the float is also disclosed, as is a externally-cleanable working fluid feed valve.

REFERENCES:
patent: 1699464 (1929-01-01), Dutcher
patent: 5141405 (1992-08-01), Francart, Jr.
patent: 5366349 (1994-11-01), Ilg
patent: 5401142 (1995-03-01), Yumoto
patent: 5445501 (1995-08-01), Yumoto

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