Solenoid-operated gate valve

Claim 1

IN A VALVE ASSEMBLY, A VALVE BODY HAVING THEREIN A VALVE CHAMBER, ALIGNED PORTS ON OPPOSITE SIDES OF AN OPENING INTO SAID CHAMBER, A SEALING RING OF FLEXIBLE MATERIAL BOUNDING EACH OF SAID PORTS, A VALVE GATE SLIDABLY MOUNTED IN SAID VALVE CHAMBER, SAID VALVE GATE BEING MOUNTED FOR SLIDING MOVEMENT FROM A POSITION BETWEEN AND IN SEALING ENGAGEMENT WITH SAID SEALING RINGS TO A POSITION LATERALLY REMOVED THEREFROM, A PLASTIC COATING ON OPPOSITE FACES OF SAID VALVE GATE FOR SLIDING ENGAGEMENT WITH SAID SEALING RINGS, A VALVE CHAMBER EXTENSION LATERALLY OFFSET FROM SAID PORTS AND IN ALIGNMENT WITH SAID VALVE CHAMBER FOR RECEIVING SAID GATE WHEN SAID GATE IS RETRACTED FROM SAID FIRST-NAMED POSITION, SPRING MEANS POSITIONED WITHIN SAID EXTENSION AND OPERATIVE AGAINST ONE END OF SAID VALVE GATE TO URGE SAID VALVE GATE TOWARD SAID FIRST-NAMED POSITION AND A SOLENOID SURROUNDING SAID VALVE CHAMBER EXTENSION AND ACTING DIRECTLY ON SAID GATE FOR SLIDING SAID