Fluid handling – Flow affected by fluid contact – energy field or coanda effect – Means to cause rotational flow of fluid
Patent
1992-01-13
1993-03-30
Chambers, A. Michael
Fluid handling
Flow affected by fluid contact, energy field or coanda effect
Means to cause rotational flow of fluid
137812, 137833, 251368, F15C 116
Patent
active
051975173
ABSTRACT:
A miniature non-return valve comprises a circular recess with an inlet at its center, an annular groove coaxial with the recess and communicating with the recess at a number of points within the groove, and an outlet duct communicating with the groove. Fluid entering the inlet passes through the recess, the annular groove and the outlet duct substantially unimpeded, whereas fluid entering the outlet duct forms a vortex in the recess so that flow of that fluid to the inlet is inhibited. Control fluid may be fed into the recess to initiate or enhance formation of the vortex. The inlet and the circular recess may be provided in first and second substrates, respectively, and the annular groove and the outlet duct may be provided in a third substrate, all by a micromachining process, the substrates being bonded together in a stack. The substrates may be formed of silicon.
REFERENCES:
patent: 3324891 (1967-06-01), Rhoades
patent: 3496961 (1970-02-01), Erwin
patent: 3507116 (1970-04-01), Berry
patent: 3515158 (1970-06-01), Utz
patent: 3528445 (1970-09-01), Shinn et al.
patent: 3712321 (1973-01-01), Bauer
patent: 4846224 (1989-07-01), Collins et al.
Chambers A. Michael
GEC--Marconi Limited
LandOfFree
Valve devices does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Valve devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Valve devices will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1275062