Claims
- 1. A multiple fluid pumping apparatus comprising
- a first fluid reservoir having means defining a dispensing first neck top opening and means defining an open bottom end,
- a first plunger slidably disposed in said first fluid reservoir,
- a second fluid reservoir having means defining a dispensing second neck top opening and means defining an open bottom end,
- a second plunger slidably disposed in said second fluid reservoir,
- means for providing air pressure to each of said first and second plungers to push said plungers down their respective reservoirs toward their respective neck ends,
- means for controlling the flow of air pressure to said first and second plungers to maintain said plungers adjacent each other as they move down said reservoirs, said means comprising
- means for creating a magnetic field connected to said first plunger,
- a first means for detecting a magnetic field connected to said second plunger,
- a second means for detecting a magnetic field connected to said second plunger and spaced longitudinally along said plunger apart from said first means for detecting a magnetic field,
- means electrically connected to said first means for detecting a magnetic field, for controlling the flow of air to said first plunger when said magnetic field is detected, and
- means electrically connected to said second means for detecting a magnetic field, for controlling the flow of air to said second plunger when said magnetic field is detected.
CROSS REFERENCE TO RELATED APPLICATION
This is a division of application Ser. No. 06/914,711 filed Oct. 2, 1986, and issued on Oct. 20, 1987, as U.S. Pat. No. 4,701,112.
US Referenced Citations (10)
Divisions (1)
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Number |
Date |
Country |
Parent |
914711 |
Oct 1986 |
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