Valves

• US 3,202,178 A
• Filed: 10/20/1964
• Issued: 08/24/1965
• Est. Priority Date: 10/20/1964
• Status: Expired due to Term

• Current Assignee: Milton Wolfe Duane
• Original Assignee: Milton Wolfe Duane
• Inventors: MILTON WOLFE DUANE
• Application Number:
  US04/405,301
• Time in Patent Office: 308 Days
• US Class Current: 137/516.29
• CPC Class Codes: F16K 1/46 Attachment of sealing rings
• CPC Class Codes: Y10S 251/90 Valves with o-rings
• CPC Class Codes: Y10T 137/7868 Resilient gasket

Claims

1. A SLUSH PUMP VALVE COMPRISING A METAL VALVE SEAT RING HAVING AN UPPER END AND A LOWER END, SAID SEAT RING HAVING AN UPWARDLY INWARDLY FACING CONICALLY TAPERED INNER PERIPHERAL SURFACE PROVIDING A VALVE SEAT, A METAL VALVE DISC MOUNTED FOR RECIPROCATION IN THE LINE OF THE SEAT AXIS, SAID VALVE DISC HAVING A DOWNWARDLY OUTWARDLY FACING OUTER PERIPHERAL SEATING SURFACE CONICALLY TAPERED CORRELATIVE TO SAID VALVE SEAT ADAPTED TO ENGAGE THE LOWER PART OF THE VALVE SEAT WHEN THE DISC IS IN THE LOWERMOST POSITION OF ITS RANGE OF RECIPROCATION, SAID VALVE DISC ALSO HAVING A DOWNWARDLY OUTWARDLY FACING OUTER PERIPHERAL ANNULAR GROOVE ABOVE SAID SEATING SURFACE, AT LEAST THE PORTION OF SIAD DISC HAVING SAID GROOVE BEING UNITARY, AN ELASTOMER O-RING HAVING DUROMETER HARDNESS IN EXCESS OF 50 SNAPPED INTO SAID GROOVE, SAID GROOVE HAVING A PORTION WHOSE CROSS SECTIONS ARE SEMICIRCULAR PROVIDING A SUPPORT SURFACE, SAID O-RING BEING IN FULL CONTACT ENGAGEMENT WITH SAID SUPPORT SURFACE, THE CONE DEFINED BY THE DIAMETERS OF SAID SEMICIRCULAR CROSS SECTIONS BEING COAXIAL WITH AND HAVING THE SAME SIZE APEX ANGLE AS THE CONE OF SAID CONICALLY TAPERED SEATING SURFACE OF THE VALVE DISC, THE APEX OF SAID CONE OF SAID SUPPORT SURFACE BEING ABOVE THE APEX OF SAID CONE OF SAID SEATING SURFACE, THE CONES OF SAID SEAT, SEALING SURFACE AND SUPPORT SURFACE HAVING A TAPER ANGLE BETWEEN 20 AND 50 DEGREES, THE PERPENDICULAR DISTANCE BETWEEN SAID SUPPORT SURFACE CONE BEING LESS THAN THE RADIUS OF SAID SEMICIRCULAR CROSS SECTION WHEREBY SAID O-RING PROTRUDES FROM SAID GROOVE BEYOND THE CONE OF SAID SEATING SURFACE OF THE VALVE DISC TO ENGAGE SAID VALVE SEAT PRIOR TO THE ENGAGEMENT THEREOF BY SAID SEATING SURFACE OF THE VALVE DISC UPON CLOSURE OF THE VALVE, THE THICKNESS OF THE PORTION OF SAID O-RING PROTRUDING BEYONF SAID SEATING SURFACE CONE OF THE VALVE DISC BEING OF THE ORDER OF 5 TO 10% OF THE DIAMETER OF THE O-RING CROSS SECTION, SAID GROOVE HAVING A MOUTH FORMED BY THE PORTIONS OF THE GROOVE LYING OUTWARDLY DOWNWARDLY FROM SAID SUPPORT SURFACE CONE, THE MINIMUM DISTANCE BETWEEN THE SIDES OF SAID MOUTH OF THE GROOVE BEING OF AT LEAST ABOUT THE SAMD EXTENT AS THE DIAMETER OF SAID SEMICIRCULAR CROSS SECTIONS TO ADMIT THE O-RING, THE VOLUME DEFINED WHEN SAID VALVE SEAT SEATING SURFACE IS IN ENGAGEMENT WITH SAID VALVE SEAT BY THE LOWER SIDE OF SAID GROOVE MOUTH AND SAID VALVE SEAT AND SAID SUPPORT SURFACE CONE AND A CONE THROUGH THE MID POINTS OF THE DIAMETERS OF SAID SEMICIRCULAR CROSS SECTIONS WHOSE APEX LIES ON THE AXIS OF THE VALVE DISC SEATING SURFACE AND WHOSE APEX ANGLE IS OPPOSITELY FACING TO AND IS THE SUPPLEMENT OF THE APEX ANGLE OF THE SEATING SURFACE CONE APEX ANGLE BEING AT LEAST AS LARGE AS ONE HALF THE VOLUME DEFINED BY SAID SUPPORT SURFACE AND SAID SUPPORT SURFACE CONE TO ACCOMMODATE THE ELASTOMER OF THE O-RING AS IT FLOWS ON CLOSURE OF THE VALVE, THE SPACE BETWEEN SAID SUPPORT SURFACE COPNE AND SAID CONE THROUGH THE MID POINTS AND SAID VALVE SEAT AND THE UPPER SIDE OF SAID GROOVE MOUTH WHEN SAID VALVE IS IN CLOSED POSITION BEING AT LEAST AS LARGE AS SAID ONE HALF THE VOLUME DEFINED BY SAID SUPPORT SURFACE AND SAID SUPPORT SURFACE CONE TO ACCOMMODATE THE ELASTOMER OF THE ORING AS IT FLOWS ON CLOSURE OF THE VALVE, THE LOWER SIDE OF SAID MOUTH PORTION FORMING WITH THE VALVE SEAT FURFACE THEREABOVE AN OBTUSE ANGLE.