Valve

Claim 1

IN A BUTTERFLY-POPPET VALVE, THE COMBINATION OF A VALVE BODY HAVING A THROUGH FLOW PASSAGE FOR WORKING FLUID WITH UPSTREAM INLET AND DOWNSTREAM OUTLET, AN UPSTREAMWARDLY FACING ANNULAR VALVE SEAT LOCATED IN THE VALVE BODY INWARDLY ADJACENT TO THE OUTLET, A CIRCULAR BUTTERFLY-POPPET MOVABLE VALVE DISK ADAPTED IN CLOSED POSITION TO FIT THE VALVE SEAT, A VALVE-OPERATING SHAFT EXTENDING DIAMETRICALLY THROUGH THE FLOW PASSAGE OF THE VALVE BODY UPSTREAMWARDLY WITH RESPECT TO THE VALVE SEAT WITH ITS END JOURNALED IN THE LATERAL WALL OF SAID VALVE BODY AND INCLUDING CO-AXIAL INNER AND OUTER SHAFT SECTIONS OF WHICH CORRESPONDING ENDS PROTRUDE EXTERIORLY FROM THE VALVE BODY WITH THE INNER SHAFT SECTION PROTRUDING FURTHER THAN THE OUTER SHAFT SECTION, A FIRST MOTION TRANSMISSION MEANS CONNECTING THE MOVABLE VALVE DISK TO THE INNER SHAFT SECTION IN A MANNER TO CAUSE RECTILINEAR MOVEMENT OF SAID VALVE DISK AXIALLY TOWARD AND AWAY FROM THE VALVE SEAT IN A POPPET TWO-STAGE ACTION WHEN SAID INNER SHAFT SECTION IS ROCKED IN OPPOSITE DIRECTIONS THROUGH A PREDETERMINED ARC OF ANGULAR MOVEMENT, A SECOND MOTION TRANSMISSION MEANS CONNECTING THE MOVABLE VALVE DISK TO THE OUTER SHAFT SECTION IN A MANNER TO CAUSE ROTATIONAL MOTION OF SAID VALVE DISK ABOUT THE AXIS OF THE VALVE OPERATING SHAFT IN A BUTTERFLY TWO-STAGE ACTION BETWEEN PARTIALLY OPEN POSITION AND FULLY OPEN POSITION FEATHERED IN THE WORKING FLUID STREAM AND THE REVERSE WHEN SAID OUTER SHAFT SECTION IS ROCKED IN OPPOSITE DIRECTIONS THROUGH A PREDETERMINED ARC OF ANGULAR MOVEMENT, CO-ORDINATED ACTUATION MEANS FOR THE RESPECTIVE SECTIONS OF THE VALVE-OPERATING SHAFT LOCATED EXTERIORLY WITH RESPECT TO THE VALVE BODY, SAID VALVE ACTUATION MEANS BEING CONSTRUCTED AND ARRANGED TO IMPART SEQUENTIAL ROCKING MOVEMENT TO SAID RESPECTIVE SHAFT SECTIONS IN A MANNER TO ROCK THE INNER SECTION IN ONE DIRECTION FOLLOWED BY ROCKING OF THE OUTER SECTION IN THE SAME DIRECTION AND THEN TO ROCK SAID OUTER SECTION IN THE REVERSE DIRECTION FOLLOWED BY ROCKING OF SAID INNER SECTION IN THE REVERSE DIRECTION, THE SHAFT ACTUATION MEANS INCLUDING PINION GEARS PROVIDED FIXEDLY ON THE EXTERIORLY PROTRUDING ENDS OF THE RESPECTIVE INNER AND OUTER SECTIONS OF THE VALVE OPERATING SHAFT, A UNITARY TOOTHED ACTUATOR RACK BAR MOUNTED EXTERIORLY WITH RESPECT TO THE VALVE BODY FOR LONGITUDINAL RECIPROCATION IN A RECTILINEAR PATH TANGENTIAL TO THE VALVE OPERATING SHAFT AND DIVIDED ALONG ITS CENTER LINE INTO RESPECTIVE FIRST AND SECOND RACK SECTIONS, OF WHICH RACK SECTIONS SAID FIRST RACK SECTION HAS A LONG ROW OF TEETH IN CONTINUAL MESH WITH THE PINION GEAR ON THE INNER SHAFT SECTION AND IS OF SUFFICIENT LENGTH TO ROTATE SAID INNER SHAFT SECTION THROUGH AN ARC OF 180 DEGREES IN EITHER DIRECTION TO CAUSE RECTILINEAR AXIAL MOVEMENT OF THE MOVABLE VALVE DISK IN ITS POPPET ACTION STAGES, AND OF WHICH RACK SECTIONS SAID SECOND RACK SECTION HAS A SHORT ROW OF TEETH EXTENDING THROUGHOUT ONE-HALF THE LENGTH OF SAID FIRST RACK SECTION AND ARRANGED TO BE ALTERNATELY IN AND OUT OF MESH WITH THE PINION GEAR ON THE OUTER SHAFT SECTION TO ROTATE THE LATTER THROUGH AN ARC OF 90 DEGREES IN EITHER DIRECTION AND THEREBY ROCK THE MOVABLE VALVE DISK IN ITS SUCCESSIVE BUTTERFLY ACTION STAGES, SAID SECOND RACK SECTION HAVING A FLAT TOOTHLESS LONGITUDINAL BEARING FACE LYING IN THE PLANE OF THE ROOTS OF THE TEETH OF SAID SHORT ROW AND EXTENDING FROM THE INNER END OF THE LATTER TO THE CORRESPONDING END OF THE LONG ROW OF TEETH OF SAID FIRST RACK SECTION, AND THE PINION GEAR ON THE OUTER SHAFT SECTION HAVING A FLAT PERIPHERAL CHORDAL BEARING FACE MERGING WITH THE TEETH OF SAID PINION GEAR AND ARRANGED FOR SLIDING CONTACT WITH THE FLAT BEARING FACE OF SAID SECOND RACK SECTION THROUGHOUT A DWELL PERIOD WHEN THE TEETH OF THE LATTER RACK SECTIONS ARE OUT OF MESH WITH THE PINION GEAR ON THE OUTER SHAFT SECTION TO PREVENT ROTATION OF SAID OUTER SHAFT SECTION WITH RESPECT TO SAID INNER SHAFT SECTION.