US 11,933,408 B2
Multi-function pressure regulation valve
Craig B. Nelson, Walla Walla, WA (US); and Riley D. Greenwood, Walla Walla, WA (US)
Assigned to NELSON IRRIGATION CORPORATION, Walla Walla, WA (US)
Filed by Nelson Irrigation Corporation, Walla Walla, WA (US)
Filed on Sep. 14, 2021, as Appl. No. 17/474,437.
Application 17/474,437 is a continuation in part of application No. 16/386,899, filed on Apr. 17, 2019, granted, now 11,126,208.
Claims priority of provisional application 62/658,968, filed on Apr. 17, 2018.
Prior Publication US 2021/0404572 A1, Dec. 30, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. F16K 31/122 (2006.01); F16K 1/12 (2006.01); G05D 16/06 (2006.01); G05D 16/18 (2006.01); G05D 16/20 (2006.01); F16K 17/04 (2006.01); F16K 17/08 (2006.01); F16K 17/164 (2006.01); F16K 31/363 (2006.01); F16K 31/365 (2006.01)
CPC F16K 1/126 (2013.01) [F16K 1/123 (2013.01); G05D 16/0608 (2013.01); G05D 16/2095 (2019.01); G05D 16/2097 (2019.01); F16K 17/0413 (2013.01); F16K 17/082 (2013.01); F16K 17/085 (2013.01); F16K 17/164 (2013.01); F16K 31/1223 (2013.01); F16K 31/1228 (2013.01); F16K 31/363 (2013.01); F16K 31/365 (2013.01); G05D 16/185 (2013.01); G05D 16/187 (2019.01)] 20 Claims
OG exemplary drawing
 
1. A flow control device comprising:
a housing including an inlet and an outlet;
a flow conduit disposed in the housing, wherein the inlet, the flow conduit, and the outlet define a flow passage;
a valve seat disposed in the housing downstream of the inlet;
a shuttle movably disposed in the housing and displaceable between a closed position engaging the valve seat to close the flow passage and an open position spaced from the valve seat to open the flow passage;
a sealed chamber defined between the housing and the flow conduit;
a port coupled with a source of pressurized fluid, the port communicating with the sealed chamber, wherein the shuttle is displaceable between the closed position and the open position in a manner that is influenced by a pressure in the sealed chamber; and
a spring acting between the flow conduit and the shuttle, the spring biasing the shuttle toward the closed position.
 
16. A flow control device comprising:
a housing including an inlet and an outlet;
a flow conduit disposed in the housing, wherein the inlet, the flow conduit, and the outlet define a flow passage;
a valve seat disposed in the housing downstream of the inlet;
a shuttle movably disposed in the housing and displaceable between a closed position engaging the valve seat to close the flow passage and an open position spaced from the valve seat to open the flow passage;
a sealed chamber defined between the housing and the flow conduit;
a liner fixed in the housing and positioned between the housing and the shuttle, wherein the shuttle is displaceable in the liner, wherein the shuttle comprises a first lug and a second lug, and wherein the liner comprises a downstream stop and an upstream stop, the first lug engaging the downstream stop when the shuttle is in the open position, and the second lug engaging the upstream stop when the shuttle is in the closed position; and
a port coupled with a source of pressurized fluid, the port communicating with the sealed chamber, wherein the shuttle is displaceable between the closed position and the open position in a manner that is influenced by a pressure in the sealed chamber,
wherein the port comprises a valve, and wherein the flow control device further comprises a controller communicating with the valve that is configured to displace the shuttle between the closed position and the open position.