Electromagnetically controlled valve

Claim 1

AN ELECTROMAGNETICALLY OPERATED FLUID VALVE APPARATUS ADAPTED TO BE CONNECTED TO A SOURCE OF ELECTRICAL POWER, SAID APPARATUS INCLUDING: A VALVE BODY HAVING A WALL WITHIN SAID BODY DIVIDING SAID BODY INTO AN INLET CHAMBER AND AN OUTLET CHAMBER, SAID WALL HAVING AN OPENING THERETHROUGH AND DEFINING AN APPROXIMATELY PLANAR VALVE SEAT ABOUT SAID OPENING ON THE INLET CHAMBER SIDE, AN INLET CONNECTION TO THE INLET CHABER, AND AN OUTLET CONNECTION TO THE OUTLET CHAMBER; A CLOSURE FITTED AGAINST SAID SEAT TO SEAL SAID OPENING, SAID CLOSURE HAVING A PLUG EXTENDING INTO SAID OPENING AND SPACED FROM THE SIDES OF THE OPENING WHEREBY WHEN SAID CLOSURE IS UNSEATED THE FLUID FLOW THROUGH THE OPENING MAY BE VARIED BY VARYING THE POSITION OF THE PLUG WITH RESPECT TO THE PLANE OF THE SEAT; MEANS TO URGE THE CLOSURE AGAINST THE SEAT; AND SOLENOID ACTUATED OPERATING MEANS CONNECTED DEVICE TO FIRST SOLEAND COMPRISING A FIRST ELECTROMAGNETIC A DEVICE TO FIRST UNSEAT THE CLOSURE ALONG A LINE APPROXIMATELY NORMAL TO THE PLANE OF THE SEAT A DISTANCE SUFFICIENT TO SUBSTANTIALLY BALANCE THE FLUID PRESSURE AT OPPOSITE SIDES OF THE CLOSURE AND A SECOND ELECTROMAGNETIC DEVICE OPERABLE ONLY AFTER SAID FIRST DEVICE HAS BEEN ACTUATED TO THEREAFTER MOVE THE CLOSURE FURTHER AWAY FROM THE SEAT AND TO DISPLACE THE PLUG FURTHER FROM ITS POSITION.