Patent ID: 8943950
Filing Date: 2015-02-03
Classification: F04B

Abstract:
1. A reciprocating pump comprising: (a) A first sleeve defining a first compression chamber; (b) A first plunger receivable in the first sleeve; (c) A second sleeve defining a second compression chamber, the second compression chamber in fluid communication with the first compression chamber; (d) A second plunger receivable in the second sleeve; (e) At least one outlet and at least one inlet in fluid communication with both the first and second compression chambers; (f) A first crankshaft coupled to the first plunger, the first crankshaft drivingly coupled to a prime mover; (g) A second crankshaft coupled to the second plunger, the second and first crankshafts coupled to each other through a differential and rotatable about a common crankshaft axis; (h) a differential housing for housing the differential, the differential housing rotatable about the common crankshaft axis; (i) rotation means for rotating the differential housing; whereby rotation of the differential housing effects a phase shift between strokes of the first and second plungers ranging from −180° to 180° to modulate effective flow of fluid out of the outlet.