F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
F16K 31/02 (2006.01) F16K 11/24 (2006.01) F16K 39/02 (2006.01)
Patent
CA 2137103
Water enters a common manifold at one or more individually line valved inlet ports, and is routed selectively by direct acting type solenoid operated valves to plural exit ports from the manifold. One exit port solenoid valve is normally open and the solenoid valves for each of the other exit ports are normally closed. For instance valve 5a controlsall three ports 3a - 3c. The line valves are closed thus lowering the pressure within manifold 1, whenever any one or more of exit valves is to be actuated -- i.e., closing the normally open or opening the normally closed valves which are low force directing acting. If desired, the normally open (N.O.) exit valve may have a small central hole in the moveable valve poppet for allowing a pilot flow for lowering of pressure, when this normally open valve is in the closed position and is to be allowed to open without requirement for a very strong return spring 21. The N.O. valve solenoid armature has a head portion received in a cavity in the poppet; and the had portion is operative for limited lost motion with respect tothe poppet for opening the pilot passage which lowers the manifold pressure permitting the return spring to re-open the N.O. valve. The manifold may have an automatic pressure release device 9 and there may be flow regulators and/or filters 16 associated with the inlet valves 15,18.
Borden Ladner Gervais Llp
Corporation Eaton
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