Dispensing – With discharge assistant – Fluid pressure
Patent
1976-12-14
1978-06-06
Reeves, Robert B.
Dispensing
With discharge assistant
Fluid pressure
734254P, 128237, B65D 8314
Patent
active
040931080
ABSTRACT:
A syringe is adapted to overcome a pressure resistance at its outlet as may be provided, for instance, by a filter in communication with the outlet and through which the syringe is to pump a medium, particularly a liquid medium, for filtration. The syringe comprises a first cylinder containing a piston and a piston rod. The piston rod is fixed to a second piston sliding within a longitudinal bore in the first-mentioned piston. The bore and the second piston cooperate to define an air-filled pressure chamber connected to a first cylinder chamber, defined by the first piston and the first cylinder, by a valve. Inward movement of the piston rod produces an over-pressure (e.g. 16 atmospheres) in the pressure chamber to open the valve to apply the over-pressure to the liquid or other medium in the cylinder chamber to overcome the pressure resistance of the filter and enable the liquid to be forced through the filter.
REFERENCES:
patent: 1435034 (1922-11-01), Ullman
patent: 1623101 (1927-04-01), Fisher
patent: 1751128 (1930-03-01), Cocks
patent: 3635218 (1972-01-01), Ericson
patent: 3685514 (1972-08-01), Cheney
Grundmann Peter
Hein Wolfgang
Bartuska Francis J.
Carl Schleicher & Schull
Reeves Robert B.
LandOfFree
Syringe adapted to overcome a pressure resistance does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Syringe adapted to overcome a pressure resistance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Syringe adapted to overcome a pressure resistance will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1488108