Valve with improved junk ring structure
Patent 6726177 Issued on April 27, 2004. Estimated Expiration Date: 
July 2, 2022. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 2, 2022. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3156445 3250510 Ball valve Butterfly valve Modular butterfly valve for tablets, capsules and the like Patent #: 5620167 InventorAssigneeApplicationNo. 10187358 filed on 07/02/2002US Classes:251/306, Head and/or seat packing251/361Mounted between casing sectionsExaminersPrimary: Bastianelli, JohnAttorney, Agent or FirmInternational ClassF16K 122AbstractThe valve with an improved junk ring structure is composed of a main body, a valve disk, a washer and a junk ring. The main body has on one side thereof a stepped surface of which the outermost end has a screw thread portion on the inner wall thereof, the main body has on an inner wall thereof a protrusion. An upper and a lower pivotally connecting block are provided on the valve disk, and are movably connected by an axle provided on the main body. The junk ring has on the outer wall of the periphery thereof a screw thread portion mating with the screw thread portion of the main body. The washer is placed between the main body and the junk ring. By the arrangement of two screw threads (or multiple screw threads) with an identical screwing direction provided respectively on both the screw thread portions of the main body and of the junk ring, the entire valve can be assembled firmer and more convenient, the threads can be formed on a lathe simultaneously to reduce the number of times and the cost of production. | |
