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Pipette with elastic bellows

  • US 4,296,071 A
  • Filed: 11/14/1979
  • Issued: 10/20/1981
  • Est. Priority Date: 11/29/1978
  • Status: Expired due to Term
First Claim
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1. A pipette comprising:

  • an elongated casing;

    an elastic bellows disposed in the casing with one end thereof fixed to the casing; and

    means mounting the other end of the bellows for longitudinal movement relative to the casing from a rest position to a predetermined compressed position and wherein the bellows is prestressed over the entire range of travel between the rest and compressed positions and has sufficient elasticity to return to the rest position unaided, the mounting means comprising stop means forming two separate stops limiting movement of the other end of the bellows wherein one stop defines the rest position and the other stop defines the compressed position.

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