Dispensing – With recorder – register – indicator – signal or exhibitor – Position or extent of motion indicator
Patent
1976-02-12
1978-02-21
Reeves, Robert B.
Dispensing
With recorder, register, indicator, signal or exhibitor
Position or extent of motion indicator
222309, G01F 1106
Patent
active
040748316
ABSTRACT:
An apparatus for dispensing accurate volumes of liquid drawn from a reservoir to which the apparatus is attachable comprises a plunger for drawing the liquid past a non-return inlet valve into a barrel on a forward stroke of the plunger in the barrel and for expelling the liquid past a non-return delivery valve on the return stroke. The forward stroke of the plunger and hence the volume of liquid drawn in is limited by a coarse setting provided by an abutment adjustable in discrete increments along the plunger co-operating with one side of a fixed abutment on the barrel. The return stroke of the plunger, and hence the volume of liquid expelled, is limited by a vernier setting provided by a further abutment rotatable in discrete increments about the barrel and co-operating with an opposite side of the fixed abutment.
REFERENCES:
patent: B497853 (1976-02-01), Reed et al.
patent: 1979428 (1934-11-01), Wheeler
patent: 3052376 (1962-09-01), Fogg
patent: 3211335 (1965-10-01), Shapiro
patent: 3430813 (1969-03-01), Gilmont
patent: 3452901 (1969-07-01), Roach
patent: 3802608 (1974-04-01), Gullett
Reeves Robert B.
Scherbel David A.
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