Vacuum actuated pump

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4815634
SERIAL NO

07032054

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A vacuum actuated chemical dispenser. The dispenser includes a chemical chamber and a vacuum chamber. The dispenser further includes a chemical chamber piston and a vacuum chamber piston located and movable within their respective chambers. A coil spring associated with the pistons returns the pistons to a pre-vacuum actuated position. The pistons are adjustable in order to adjust the measured amount of chemical to be dispensed from the chemical chamber.

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Patent Owner(s)

Patent OwnerAddress
DEMA ENGINEERING CO10020 BIG BEND BOULEVARD A CORP OF MO ST LOUIS MO 63122

International Classification(s)

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  • 1987 Application Filing Year
  • E03C Class
  • 33 Applications Filed
  • 0 Patents Issued To-Date
  • 0 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances19870255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nowicki, Michael L House Springs, MO 6 180

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Patent Citation Ranking

  • 19 Citation Count
  • E03C Class
  • 0 % this patent is cited more than
  • 36 Age
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