Dual plunger pump system

Details Dual plunger pump system Dual plunger pump system

1992-03-03

1993-04-06

Bertsch, Richard A.

Pumps

Including disengageable rotary or frangible drive connection

417223, 417435, F04B 900, F04B 3900, F04B 4900, F04B 4500

Patent

active

051998572

ABSTRACT:
Two plungers in the dual plunger pumps are selectively operated by either short-stroke cams or long-stroke cams which are disposed on a rotary drive shaft. When rotating the rotary drive shaft in one direction, the long-stroke cams are driven to operate the plungers with a large stroke. When the drive shaft rotates in the reverse direction, the long-stroke cams run idle by way of a one-way clutch disposed between the drive shaft and the long-stroke cams, while the short-stroke cams are driven to operate the plungers with a small stroke.

REFERENCES:
patent: 4392784 (1983-07-01), Hanafi
patent: 4416588 (1983-11-01), Karliner

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