Measuring and testing – Sampler – sample handling – etc. – Capture device
Patent
1983-08-30
1985-02-26
Swisher, S. Clement
Measuring and testing
Sampler, sample handling, etc.
Capture device
7386418, B01L 302
Patent
active
045011630
ABSTRACT:
A liquid micro-dispensing pipet consisting of a main barrel with a snap-on dispensing tube tip. An axial, upwardly spring-biased operating shaft is slidably and rotatably engaged in the barrel, connected to a plunger in the dispensing tip. The snap-on tip can be at times disengaged from the barrel by exerting axial downward force on the shaft. Stop means to limit the intake movement of the plunger is provided, said stop means consisting of an abutment sleeve slidably and non-rotatably mounted on the upper portion of the shaft and threadedly engaged in the barrel, the abutment sleeve being engageable from below by a stop washer secured on the shaft, which is normally urged upwardly by its biasing spring. The normal elevated position of the plunger can be varied by rotating the barrel relative to the shaft. The shaft has a hexagonal upper portion which slidably and non-rotatably engages in the abutment sleeve, and which also drivingly engages through the drive wheel of a 3-wheel digital counter of the internal pinion type, mounted in the top portion of a handle secured to the barrel, a viewing window for observing the number wheels being provided in the handle. Secured on the top end of the operating shaft is a knurled hollow bushing for manually rotating the shaft relative to the barrel. A calibrating tool rod is carried by a push-button disc. The rod is housed in the hollow bushing and in a recess in the top of the shaft and depends axially from the disc via a hub rotatably carrying a split friction ring engaging the inside wall of the bushing and retentively holding the push-button disc in overlying relation to the bushing while allowing it to rotate freely relative to the bushing.
REFERENCES:
patent: 3013435 (1961-12-01), Rodrigues, Jr.
patent: 4023716 (1977-05-01), Shapiro
patent: 4362063 (1982-12-01), d'Autry
MacDermott Bruce R.
Shapiro Justin J.
Gordon Herman L.
Swisher S. Clement
LandOfFree
Adjustable micro-dispensing liquid pipet does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adjustable micro-dispensing liquid pipet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjustable micro-dispensing liquid pipet will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-511609