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Pump system with vacuum source

DC
  • US 6,585,492 B2
  • Filed: 07/17/2001
  • Issued: 07/01/2003
  • Est. Priority Date: 03/22/1999
  • Status: Expired due to Term
First Claim
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1. A method of changing the capacity of a liquid ring vacuum pump comprising the steps of:

  • providing a vacuum pump comprising a base member, a first port plate fixed to the base member, an original cover defining an impeller chamber, and an original impeller having a width disposed within the impeller chamber, the base member and the port plate being adapted to receive a drive shaft, and the impeller being fixed to the drive shaft;

    removing the original cover from the vacuum pump;

    removing the original impeller from the vacuum pump;

    installing a new impeller onto the vacuum pump, the new impeller having a width which is different from the with of the original impeller; and

    installing a new cover onto the vacuum pump, the new cover defining an impeller chamber that accommodates the different width of the new impeller.

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