Patent ID: 8113240

Claim:
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.