Dispensing – Floating piston with plural or alternate discharge
Patent
1976-04-20
1977-07-19
Tollberg, Stanley H.
Dispensing
Floating piston with plural or alternate discharge
G01F 1104
Patent
active
040364097
ABSTRACT:
A fluid metering device comprising a sealed casing provided with an inlet pipe and a delivery pipe for the metered fluid, a piston defining two variable-volume chambers in the casing and a distribution unit which rotates or oscillates in the casing and co-operates in sealing-tight manner with the part of the walls adjacent the pipes, the unit being formed with a first passage opening directly into the first chamber and a second passage prolonged by a tubular portion which extends through the piston via an orifice along which it can slide, and which opens into the second chamber, the two passages being such that, during a portion of the rotation or oscillation, the inlet pipe is connected to the first of the two chambers and the delivery pipe is connected to the second chamber and, during another portion of the rotation or oscillation, the delivery pipe is connected to the first chamber and the inlet pipe to the second chamber, the resulting alternate connection causing the element forming a piston to move and deliver the fluid admitted into each of the two chambers, characterized in that the casing is a hollow cylinder, the base of which extends in a plane perpendicular to its generatrices, the inlet and delivery pipes opening on to the base, the perpendicular plane co-operating in sealing-tight manner with the plane surfaces bounding the orifices of the two passages which extend through the distribution unit.
REFERENCES:
patent: 507316 (1893-10-01), Fowler
patent: 3487980 (1970-01-01), Tanner
Lane Hadd
Tollberg Stanley H.
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