Manual pipette with delayed-action home position latch

Details Manual pipette with delayed-action home position latch Manual pipette with delayed-action home position latch

1996-08-15

1998-08-11

Pyon, Harold Y.

Chemical apparatus and process disinfecting, deodorizing, preser

Control element responsive to a sensed operating condition

422103, 7386416, 7386418, 436180, B01L 302, G01N 114

Patent

active

057924244

ABSTRACT:
A manual pipette including a delayed action home position latch for engaging only after the plunger unit of the pipette has moved downward through its home position to thereafter releasably connect a moveable bottom stop member to the plunger unit to move therewith and upon an upward return of the plunger unit by the pipette's return spring to engage a home position stop to releasably lock the plunger unit in its home position without any downward force being exerted by the pipette user on the plunger unit.

REFERENCES:
patent: 3827305 (1974-08-01), Gilson et al.
patent: 4041764 (1977-08-01), Sabloewski et al.
patent: 4327595 (1982-05-01), Schultz
patent: 4406170 (1983-09-01), Kuhn
patent: 4763535 (1988-08-01), Rainin et al.
patent: 4909991 (1990-03-01), Oshikubo
patent: 5364596 (1994-11-01), Magnussen, Jr. et al.

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