Attachment for a vacuum pump

  • US 6,681,812 B2
  • Filed: 03/13/2002
  • Issued: 01/27/2004
  • Est. Priority Date: 03/21/2001
  • Status: Expired due to Fees
First Claim
Patent Images

1. An attachment for a vacuum pump, for evacuating a first fluid from a container and for introducing a second fluid into the container, said attachment having:

  • a body having;

    a first inlet for the first fluid;

    a second inlet for the second fluid;

    an outlet;

    a passage connecting the outlet to each of the inlets, the outlet being attachable to the vacuum pump and the first inlet being attachable to the container; and

    a valve within the passage adjacent the outlet, said valve being moveable between a first position in which the passage is closed and a second position in which the passage is open, the valve being biased to remain in the first position, and whilst a vacuum is applied to the attachment by the vacuum pump, the valve is in the second position and the first fluid may be drawn into the vacuum pump; and

    an operating member for regulating the flow of fluid through the second inlet.

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