Fluid handling – Line condition change responsive valves – Bi-directional flow valves
Patent
1980-07-29
1982-08-31
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
Bi-directional flow valves
91420, 1374545, 137495, 137508, F16K 1738
Patent
active
043467334
ABSTRACT:
A control valve that can be used as a pilot-assisted pressure relief valve or as a sequence valve, which is substantially insensitive to system back pressure. The valve comprises a valve body 10 defining a multistep bore 36, and a valve member 44 engageable with a coaxial valve seat 46, both supported for reciprocating motion within the bore 36 and cooperating to control the fluid communication between first and second ports 30, 32 defined in the valve body 10. A primary biasing spring 48 enclosed within a vented spring chamber 52 urges the valve member 44 into engagement with the valve seat 46. Fluid pressure at the first port 30 exerts fluid forces on the valve member 44 that opposes the primary spring force. The valve member 44 is a unitary element including first and second annuli 44a, 44b joined by a reduced diameter shank portion 44c. A radial surface on the first annuli 44a defines a net effective pressure area against which fluid pressure at the port 30 is applied. An end surface 92 formed on the second annulus 44b defines an effective pressure area against which pilot pressure can be applied to further oppose the primary spring force. The valve member 44 disengages the valve seat 46 when the combined force of fluid pressure at the first port and the pilot pressure applied to the end surface 92 exceeds the primary spring force. The coaxial valve seat forms a check valve that is operative to allow substantially unrestricted fluid flow from the second port 32 to the first port 30.
REFERENCES:
patent: 3529624 (1970-09-01), Cryder
patent: 3595264 (1971-07-01), Martin
patent: 3596566 (1971-08-01), Krehbiel
patent: 3792715 (1974-02-01), Parrett
patent: 4040600 (1977-08-01), Coppola
Racine Hydraulics Catalog, Valve Design No. 1318, Nov., 1970.
Fluid Controls Inc.
Nilson Robert G.
LandOfFree
Control valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Control valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2180533