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Pumping system, replacement kit including piston and/or cylinder, and method for pumping system maintenance

  • US 7,284,961 B2
  • Filed: 06/06/2002
  • Issued: 10/23/2007
  • Est. Priority Date: 06/06/2002
  • Status: Expired due to Term
First Claim
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1. In a pumping system comprising:

  • a pump including an original piston, the improvement comprising;

    a replacement piston having two opposite ends, and a replacement cylinder associated with the replacement piston, fluid acting on one of the two opposite ends causing the replacement piston to move in a first direction and fluid acting on the other of the two opposite ends causing the replacement piston to move in a second direction opposite to the first direction, wherein a cross sectional area of the replacement piston, as installed, at a position between the two opposite ends is smaller than a cross sectional area of the original piston of the pump at a corresponding position.

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