Pumps – One fluid pumped by contact or entrainment with another – Liquid pumped by supplying or exhausting gaseous motive...
Patent
1994-04-26
1995-05-30
Bertsch, Richard A.
Pumps
One fluid pumped by contact or entrainment with another
Liquid pumped by supplying or exhausting gaseous motive...
F04B 908
Patent
active
RE0349577
ABSTRACT:
A snap-over toggle linkage valve actuating mechanism for alternately opening and closing a gas inlet valve and a gas outlet valve, has a pair of spring preload arms pivotably mounted to a fixed mainframe within a sealed pressure vessel for pivoting about a first pivot axis. A first toggle link is pivoted at a first end to the mainframe about the pivot axis A. A second toggle link preferably a compression coil spring under precompression is pivoted at one end about a second pivot axis C parallel to the first pivot axis A on said pair of spring preload arms. The second end of the first toggle link is pivoted to a second end of the second toggle link for pivoting about a third axis B parallel to axes A and C. The second toggle link constantly applies a compressive force on the pivot connection between the first and second toggle links such that a float within the vessel as a result of rise and fall of the liquid pivots the spring preload arms toward a position of longitudinal alignment with the longitudinal axis of the spring preload arms with an increasing compressive force applied to the first toggle link to maintain the first toggle link stationary in one of two oblique, over-center positions with respect to a center line Y extending parallel to the longitudinal axis of the spring preload arms with the second toggle link pivoting about the axis B and being axially compressed until the first and second links move across the center line Y. At that time, both toggle links instantly snap over into oppositely oblique, over-counter positions. The compressive force of the second toggle line may be variably adjusted.
REFERENCES:
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patent: 2394169 (1946-02-01), Gray et al.
patent: 3242873 (1966-03-01), Smith
Bertsch Richard A.
Richman Howard R.
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