Disc valve with magnetic operation

Claim 1

A VALVE INCLUDING A HOUSING HAVING A BORE EXTENDING AXIALLY THEREOF, A PLUG THAT FITS INTO ONE END OF THE BORE AND THAT IS SHORTER THAN THE BORE SO AS TO LEAVE SPACE AT THE OTHER END OF THE BORE, SAID SPACE SERVING AS A VALVE CHAMBER, AN END WALL AT THE OTHER END OF THE BORE CLOSING SAID VALVE CHAMBER, A FLUID PASSAGE EXTENDING THROUGH THE PLUG IN AN AXIAL DIRECTION FOR AT LEAST A PART OF THE LENGTH OF THE LENGTH OF THE PLUG, SAID PASSAGE OPENING INTO THE CHAMBER, A VALVE ELEMENT IN THE CHAMBER MOVABLE AXIALLY TO CLOSE AND OPEN SAID PASSAGE, THE PLUG HAVING AN END FACE OF SUBTANTIAL RADIAL EXTEND SURROUNDING SAID PASSAGE, AND THE VALVE ELEMENT HAVING A COMPLEMENTARY FACE THAT CONFRONTS AND IS ADJACENT TO THE END FACE OF THE PLUG WHEN THE VALVE ELEMENT IS IN POSITION TO CLOSE SAID PASSAGE, PORTS OPENING THROUGH A SIDE WALL OF THE BORE AT DISTANCES LENGTHWISE OF THE BORE, A REDUCED DIAMETER END PORTION OF THE PLUG EXTENDING FROM ONE OF SAID OPENINGS TO THE CHAMBER END OF THE PLUG AND PROVIDING A SECOND PASSAGE OPENING INTO THE VALVE CHAMBER, AND A CROSS PASSAGE IN THE PLUG FROM THE AXIAL PASSAGE IN THE PLUG TO ANOTHER REDUCED DIAMETER PORTION OF THE PLUG THAT IS AXIALLY SPACED FROM THE REDUCED DIAMETER AND PORTION AND LOCATED AT ANOTHER OF THE OPENINGS THROUGH THE WALL OF THE BORE.