Pipette with elastic bellows
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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Abstract
Pipette with elastic bellows wherein the travel of the bellows is limited by preset stops. The bellows is prestressed between the stops over a range of movement within which the bellows possesses adequate springback force to return to a rest position predetermined by one of the stops.
59 Citations
8 Claims
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- an elongated casing;
Specification