F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
137/95
F16K 11/07 (2006.01) E21B 33/035 (2006.01) F16K 11/065 (2006.01)
Patent
CA 1186590
PILOT ACTUATED SPOOL VALVE Abstract of the Disclosure A pilot control valve having a housing and a gen- erally tubular shaped cage having supply fluid ports, vent ports and an outlet port with a pilot actuated hollow spool valve element telescopically movable in the cage and poppet seats at opposite ends of the cage for engagement by the valve element. The supply ports and the vent ports are elongated slots directed transversely to the axis of the cage and valve element for pro- viding maximum flow passages with a minimum of spool travel. The ends of the spool are in contact with the cage at all times and the axial extent of the contact between the spool and the cage is greater than fifty percent. The spool engages the interior of the cage at the fluid ports and vent ports for reducing flow restric- tions. The cage is of metal and includes a recess coaxially positioned at each end of the cage for receiving and enclosing one of the valve seats. A metal valve housing abuts one end of the metal cage and includes exterior threads for securing the valve into a pocket for properly loading the valve seats. A dash pot between the valve element and the cage cushions the valve element. A pilot control stem is connected to the valve element exteriorly of the valve element. A spring plate having a recess is connected to the control stem by a split ring connected to a groove in the stem and positioned in the recess. The valve is pressure com- pensated from the ambient environment by a flexible membrane. The valve may include a seal carrier for providing a seal between mating surfaces of an underwater control-pod. The seal may be a comparison type or pressure energized type.
415823
Olejak Ingo W.v.
Tomlin Jerry B.
Borden Ladner Gervais Llp
Koomey Inc.
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