Pumping unit and reversing valve and method of operating

Details Pumping unit and reversing valve and method of operating Pumping unit and reversing valve and method of operating

1981-12-03

1985-03-12

Smith, Leonard E.

Pumps

Motor driven

Fluid motor

F04B 1700

Patent

active

045041970

ABSTRACT:
The invention relates to apparatus for and a method of remotely reversing the operation of a power piston in a power cylinder automatically to pump oil, corrosive or wax bearing fluids in response to unidirectional high pressure flow. The flow of high pressure fluid driving the piston in one direction may be reversed in the piston to drive the piston in the opposite direction at the end of the respective strokes by establishing collapsible chambers for the high pressure fluid within the piston. Each chamber is collapsed toward the end of alternate strokes by the reversing piston striking a stop slightly before the end of the stroke to partially collapse said chamber as a result of further movement of the power piston. At the conclusion of each stroke, all valving is closed and the high pressure entering the collapsed chamber now exerts force against the reversing piston, but since the reversing piston is against the stop, the force is oppositely directed to reverse the direction of the power piston. A rigid rod extends between the reversing pistons, having a length to prevent both chambers from collapsing at the same time. This insures that upon reversal of the power piston, the forward moving reversing chamber is not collapsed, and therefor no energy is lost in moving its reversing piston outwardly.

REFERENCES:
patent: 2042300 (1936-05-01), Forsberg
patent: 2051371 (1936-08-01), Erling
patent: 2748712 (1956-06-01), Sargent
patent: 3010439 (1961-11-01), Mee et al.
patent: 4087206 (1978-05-01), Russell

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