Twin check valve pump system having fail-safe characteristic

Details Twin check valve pump system having fail-safe characteristic Twin check valve pump system having fail-safe characteristic

1975-11-07

1977-06-21

Truluck, Dalton L.

Surgery

Respiratory method or device

Ozone or ion generation

128214F, 128273, 137197, 417435, A61M 518

Patent

active

040304957

ABSTRACT:
A twin check valve pumping system for use with a syringe or other variable volume pumping device for the pumping of liquids. Along a flow path between the check valves, a porous, hydrophobic member is positioned, in communication with a portion of the flow path upstream of the first, inlet check valve. The second, downstream outlet check valve is biased so that pressure in the conduit between the check valves is required for expulsion of liquid. When gas enters the system, such pressure cannot be achieved, because, upon attempted pressurization of the area between the two check valves, the gas passes through the porous, hydrophobic member back to a position upstream of the first, inlet valve. However, aqueous liquids cannot pass through the porous member, and accordingly the device pumps such liquids normally in the absence of gas.

REFERENCES:
patent: 3033911 (1962-05-01), Duddy
patent: 3559644 (1971-02-01), Stoft et al.
patent: 3572375 (1971-03-01), Rosenberg
patent: 3650093 (1972-03-01), Rosenberg
patent: 3803810 (1974-04-01), Rosenberg

Affiliated with

Also associated with

Rating

Twin check valve pump system having fail-safe characteristic does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Twin check valve pump system having fail-safe characteristic, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Twin check valve pump system having fail-safe characteristic will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-730319