Plug valve

• US 3,284,045 A
• Filed: 04/13/1965
• Issued: 11/08/1966
• Est. Priority Date: 04/13/1965
• Status: Expired due to Term

• Current Assignee: Drum-Owen Valve Company
• Original Assignee: Robert P. Kulisek
• Inventors: Kulisek, Robert P.
• Application Number:
  US04/449,928
• Time in Patent Office: 574 Days
• US Class Current: 251/315.14
• CPC Class Codes: F16K 5/0636 the spherical plug being insertable from the top of the housing
• CPC Class Codes: F16K 5/0657 Particular coverings or materials

Claims

1. PLUG VALVE ASSEMBLY INCLUDING A VALVE BODY WITH A CHAMBER HAVING AN INLET AND AN OUTLET PORT AND A FLAT TRANSVERSE WALL SURFACE ACROSS ONE END AND A CIRCULAR UNFINISHED VALVE SEAT RECESSED THEREIN AND CONNECTING SAID VALVE CHAMBER WITH ONE OF SAID PORTS, A SPHERICAL PLUG SECTOR COVERED WITH AN ELASTOMER AND HAVING A VALVE SEATING SPHERICAL ZONE SURFACE THE POLAR AXIS OF WHICH IS ALIGNED WITH THE AXIS OF SAID ONE PORT WHICH AXIS IS OFFSET RELATIVE TO THE ROTARY AXIS OF SAID SPHERICAL PLUG SECTOR, A CAP CLOSING SAID SPHERICAL PLUG SECTOR IN SAID VALVE CHAMBER, AN OPERATING STEM ON SAID SPERICAL PLUG SECTOR HAVING ONE END JOURNALED IN THE BOTTOM OF SAID VALVE CHAMBER AND THE OTHER END JOURNALED IN SAID CAP, CHARACTERIZED IN THAT SAID CIRCULAR UNFINISHED VALVE SEAT HAS WITHIN ITS AXIAL LIMITS A CONVEX CROSS SECTION LONGITUDINALLY OF THE AXIS OF SAID SEAT TO RECEIVE SAID SPHERICAL VALVE ZONE SEATING SURFACE IN SEATING ENGAGEMENT.