Pumps – Processes
Patent
1996-02-23
1997-01-21
Thorpe, Timothy
Pumps
Processes
417312, 417540, 417542, F04B 1100, F04B 120
Patent
active
055954766
ABSTRACT:
An apparatus for reducing ripple in the flow of a fluid through a positive displacement pump comprises an inlet tube in fluid communication with an inlet of the pump and an outlet tube in fluid communication with an outlet of the pump. A first annulus is in fluid communication with the inlet tube and a second annulus is in fluid communication with the outlet tube. A drive shaft is connected to a main drive shaft of the pump and first and second cams are connected to the drive shaft. The first cam is associated with the first annulus and the second cam is associated with the second annulus. A plurality of pins are provided and each has a portion located within one of the annuluses and an end opposite that portion in contact with the cam associated with the respective annulus. During operation of the pump, the drive shaft rotates the cams thereby driving the pins up and down within the annulus and thereby creating a ripple within the fluid contained within the annuluses and thereby within the inlet and outlet of the pump, thereby effectively canceling or substantially offsetting the pressure ripple created by the action of the pump.
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"The Reduction of Gear Pump Pressure Ripple", Edge, et al., Proc Instnt Mech Engrs, vol. 201, No. B2, pp 99-106.
Abel Steve
Whelpley Gordon
Allied-Signal Inc.
Holden Jerry J.
McAndrews, Jr. Roland G.
Rafter John R.
Thorpe Timothy
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