Radial piston pump having means for selectively disabling at lea

Details Radial piston pump having means for selectively disabling at lea Radial piston pump having means for selectively disabling at lea

1997-05-23

1998-10-20

Denion, Thomas E.

Expansible chamber devices

Convertible, or changeable by assembly or disassembly

92 72, 92128, 92129, 417238, 417470, F01B 2904

Patent

active

058230912

ABSTRACT:
The present invention relates to a radial piston pump, and more particularly to a radial piston pump suitable for delivering liquid at a high pressure and at a volumetric output rate which can be controlled independently of the speed of rotation of the pump drive shaft. A radial piston pump(1) is provided which comprises a multiplicity of radially extending cylinders(14) each of which is provided with a radially moveable pumping plunger(15) to define, within the cylinder, a pumping chamber(16) which may be increased in volume by a movement of its associated plunger(15) in one direction to receive a liquid to be pumped and may be reduced in volume by movement of its associated plunger(15) in the opposite direction to deliver a liquid at high pressure to an output line. The pump(1) also comprises means for selectively disabling one or more of the pumping chambers(16) so that the or each disabled pumping chamber delivers no pumped fluid to the output line. The arrangement of the present invention has the advantage over the prior art of providing a reduction in the variation of drive torque.

REFERENCES:
patent: 2941475 (1960-06-01), Blair
patent: 3178888 (1965-04-01), Hampton
patent: 3682565 (1972-08-01), Yarger
patent: 4482300 (1984-11-01), Brown
patent: 4615258 (1986-10-01), Hirmann
patent: 4702680 (1987-10-01), Bohringer et al.

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