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US 8,113,240 B2Granted
Low emission fluid transfer device
AssigneeMarshall Excelsior Company
InventorsFrederick W. Blanchard, Alex L. Hoffman
Life of this patent
Estimating the term…
Abstract
A fluid transfer system includes a transfer device coupled to a dry break coupler. The transfer device includes a valve assembly moveable between an open and a closed position. The valve assembly includes a main valve and a pilot valve. An actuator controls both the main valve and the pilot valve. A cam plate interconnects the actuator and the valve assembly. The cam plate provides a quick acting shutoff to quickly move the valve assembly to the closed position. A pivotal and rotatable connector couples the transfer device to the dry break coupler. A lock is integrated with the actuator to lock the valve assembly in the closed position.
Claims16
A transfer device for transferring fluid, said device comprising:
- a housing defining an inlet, an outlet, and a longitudinal axis;
- an actuator pivotally coupled to said housing about a pivot axis transverse to said longitudinal axis, said actuator having a grasping portion moveable fore and aft relative to said housing to pivot said actuator about said pivot axis;
- a lock operatively coupled to said actuator and movable between a locked position in which said grasping portion is prevented from moving fore and aft and an unlocked position in which said grasping portion is free for moving fore and aft;
- a collar coupled to said housing and rotatable relative to said housing, said collar including threads;
- a valve assembly disposed in said housing, said valve assembly including a main valve moveable between an open-main valve position and a closed-main valve position and a pilot valve moveable between an open-pilot valve position and a closed-pilot valve position,
- said actuator operatively coupled to said valve assembly such that said pilot valve and said main valve are both moveable between their respective said open and said closed positions in response to movement of said grasping portion with said pilot valve reaching said open-pilot valve position before said main valve reaches said open-main valve position whereby said pilot valve reaches said open-pilot valve position first to equalize pressure on both sides of said main valve and enable movement of said main valve to said open-main valve position;
- and
- a biasing device disposed in said housing and coupled to said valve assembly for biasing both said pilot valve and said main valve toward their respective said closed positions.
5 more elements
A transfer device for transferring fluid, said device comprising:
- a housing defining an inlet, an outlet, and a longitudinal axis;
- an actuator pivotally coupled to said housing about a pivot axis transverse to said longitudinal axis, said actuator having a grasping portion moveable fore and aft relative to said housing to pivot said actuator about said pivot axis;
- a collar coupled to said housing and rotatable relative to said housing, said collar including threads;
- a valve assembly disposed in said housing, said valve assembly including a main valve moveable between an open-main valve position and a closed-main valve position and a pilot valve moveable between an open-pilot valve position and a closed-pilot valve position,
- said actuator operatively coupled to said valve assembly such that said pilot valve and said main valve are both moveable between their respective said open and said closed positions in response to movement of said grasping portion with said pilot valve reaching said open-pilot valve position before said main valve reaches said open-main valve position whereby said pilot valve reaches said open-pilot valve position first to equalize pressure on both sides of said main valve and enable movement of said main valve to said open-main valve position;
- and
- a biasing device disposed in said housing and coupled to said pilot valve for biasing said pilot valve toward said closed position.
4 more elements
A transfer device for transferring fluid, said device comprising:
- a housing defining an inlet, an outlet, and a longitudinal axis;
- an actuator coupled to said housing and having a grasping portion moveable fore and aft relative to said housing to move said actuator;
- a collar coupled to said housing and rotatable relative to said housing, said collar including threads;
- a valve assembly disposed in said housing, said valve assembly including a main valve moveable between an open-main valve position and a closed-main valve position and a pilot valve moveable between an open-pilot valve position and a closed-pilot valve position,
- said actuator operatively coupled to said valve assembly such that said pilot valve and said main valve are both moveable between their respective said open and said closed positions in response to movement of said grasping portion with said pilot valve reaching said open-pilot valve position before said main valve reaches said open-main valve position whereby said pilot valve reaches said open-pilot valve position first to equalize pressure on both sides of said main valve and enable movement of said main valve to said open-main valve position;
- and
- a biasing device disposed in said housing and coupled to said pilot valve for biasing said pilot valve toward said closed position.
4 more elements
Dependencies are inferred from the claim text.