Disc valve and fitting

Claim 1

A VALVE AND FITTING COMPRISING A BODY, A RESILIENT RUBBER-LIKE ANNULAR VALVE SEAT IN SAID BODY AS A SEPARATE ITEM THEREFROM AND A DISC-TYPE CLOSURE AND STEM COMBINATION MOUNTED IN SAID SEAT AND BODY, SAID BODY HAVING A FLOW PASSAGEWAY THERETHROUGH AND BEING OF A LENGTH ALONG SAID PASSAGEWAY EQUAL TO A PREDETERMINED SPACE IN A PIPELINE AND GREATER THAN THE LENGTH OF SAID SEAT, MEANS ON SAID BODY AT EACH END OF THE FLOW PASSAGEWAY ADAPTED FOR USE IN CLUPLING SAID BODY ENDS TO ADJACENT CONNECTIONS ON A PIPELINE, SAID BODY HAVING AN INTERMEDIATE PORTION OF AN INNER DIMENSION GREAT ENOUGH TO RECEIVE SAID VALVE SEAT AND SAID SEAT BEING DISPOSED IN SAID INTERMEDIATE PORTION, SAID SEAT AND BODY HAVING ALIGNED OPENINGS THEREIN TRANSVERSELY OF SAID FLOW PASSAGEWAY AND OF A SIZE TO RECEIVE SAID STEM, SAID STEM EXTENDING THROUGH SAID OPENINGS FROM THE EXTERIOR OF SAID BODY TO THE INTERIOR OF SAID SEAT AND SAID DISC BEING MOUNTED THEREON WITHIN SAID SEAT AND ROTATABLE WITH SAID STEM BETWEEN A CLOSED POSITION TRANSVERSELY OF SAID FLOW PASSAGEWAY AND AN OPEN POSIN TION WITH ITS MAJOR DIMENSION IN SUBSTANTIAL ALIGNMENT WITH SAID FLOW PASSAGEWAY, AND A PAIR OF MEANS IN SAID BODY ABUTTING OPPOSITE END PORTIONS OF SAID SEAT, ONE OF SAID SEAT ABUTTING MEANS BEING MOVABLE TOWARD THE OTHER TO CLAMP SAID SEAT BETWEEN THEM, SAID SEAT ABUTTING MEANS COMPRISING BODY LINERS LINING SAID BODY AND IN SEALING ENGAGEMENT WITH AND EXTENDING FROM EACH END OF SAID SEAT TO AND HAVING THE ENDS REMOTE FROM SAID SEAT FLUSH WITH THE RESPECTIVE ENDS OF SAID BODY WHEN SAID SEAT IS FULLYU CLAMPED ENDWISE BETWEEN SAID SEAT ABUTTING MEANS IN ITS OPERATIVE POSITION WITHIN SAID BODY.