Dispensing pipette actuator system

Details Dispensing pipette actuator system Dispensing pipette actuator system

1975-05-29

1976-08-31

Knowles, Allen N.

Dispensing

With discharge assistant

Container with follower

128218R, B67D 542

Patent

active

039775747

ABSTRACT:
A manually manipulated plunger type pipet assembly including a detachably retained disposable lower unit comprising a pipet barrel assembly with a wiper-fitted plunger having an upward extension with a pair of opposed racks on the sides, a cylindrical actuator receives and retains the pipet barrel assembly and plunger extension, and engages the racks with respective trigger pawl and spring ratchet mechanisms except when an actuator clearing sleeve is slid over exposed portions of the racks to shield them from engagement by the pawl and ratchet to permit loading the pipet assembly; a two-position trigger stop affords a choice of stroke and thus of quantity dispensed per stroke.

REFERENCES:
patent: 1270835 (1918-07-01), Jersemann
patent: 2768768 (1956-10-01), Cornell et al.
patent: 3141583 (1964-07-01), Mapel et al.
patent: 3517668 (1970-06-01), Brickson

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