No-drip check valves

Details No-drip check valves No-drip check valves

2011-03-15

2011-03-15

Hepperle, Stephen M (Department: 3753)

Fluid handling

Processes

With control of flow by a condition or characteristic of a...

C137S846000, C251S149100

Reexamination Certificate

active

07905243

ABSTRACT:
A mechanism to check fluid flow from a tube or spigot when it is disconnected from a downstream conduit is provided. The mechanism includes a duckbill check valve that has its bills pointed in the upstream direction. To keep the bills apart for the fluid flow to continue, the downstream conduit has to be inserted against the underside of the bills. Once the downstream conduit separates from the valve, the valve closes itself.

REFERENCES:
patent: 3451419 (1969-06-01), Coleman
patent: 3710942 (1973-01-01), Rosenberg
patent: 3788598 (1974-01-01), German et al.
patent: 4143853 (1979-03-01), Abramson
patent: 4498658 (1985-02-01), Mikiya
patent: 6520939 (2003-02-01), Lafontaine
patent: 6684903 (2004-02-01), Williamson et al.
patent: 6824117 (2004-11-01), Horton
patent: 1360668 (2002-07-01), None
patent: WO-0077429 (2000-12-01), None
International Preliminary Report on Patentability mailed Feb. 2, 2009 (8 pgs.).

Affiliated with

Also associated with

Rating

No-drip check valves does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with No-drip check valves, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and No-drip check valves will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2704540