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Double piston pump for administering medication

  • US 5,526,962 A
  • Filed: 05/10/1994
  • Issued: 06/18/1996
  • Est. Priority Date: 05/10/1993
  • Status: Expired due to Term
First Claim
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1. A device for administering doses of liquid medicine of predetermined quantity comprising the combination ofright and left cylinders (1, 2);

  • a substantially constant speed and force linear drive unit (15);

    a double-ended piston (4,

         5) having left and right piston ends displaceably mounted in said left and right cylinders, respectively;

    means (6) for coupling said double-ended piston to said drive unit (15); and

    a pair each of automatically opening and closing intake valves (7,

         8) and discharge valves (11,

         12) for passively controlling the operation of said device.

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