Measuring and testing – Measuring vessel
Patent
1978-07-26
1979-08-28
Yasich, Daniel M.
Measuring and testing
Measuring vessel
222309, G01N 114
Patent
active
041656466
ABSTRACT:
A liquid micro-dispenser consisting of a barrel with a snap-on dispensing tube tip at one end containing a dispensing plunger attached to an operating shaft extending through and having an abutment ring engageable with an adjustable stop bushing threadedly engageable within the other end of the barrel. The bushing has a locknut engageable with said other end of the barrel to lock the bushing adjustment, thus locking the adjusted intake volume of the dispensing tip. A square-flanged top bushing is secured to the upper end of the stop bushing, and a protective sleeve member is secured to the top bushing and surrounds the stop bushing and the upper portion of the barrel. The barrel has a volume scale visible through a volume-indicating window in the sleeve member. The sleeve member has a large cut-away aperture providing access to the locknut to allow it to be manually loosened for adjusting the volumetric setting, and for subsequently re-tightening the locknut. A coiled spring in the lower portion of the barrel biases the operating shaft upwardly to retract the dispensing plunger in the dispensing tip.
REFERENCES:
patent: 3810391 (1974-05-01), Suovaniemi
patent: 3815790 (1974-06-01), Allen et al.
patent: 3831602 (1974-08-01), Broadwin
patent: 3921864 (1975-11-01), Dawes
patent: 3982899 (1976-09-01), Kelm
patent: 4023716 (1977-05-01), Shapiro
Gordon Herman L.
Yasich Daniel M.
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