Threadless nonrotating steel coupling system
Patent 4616855 Issued on October 14, 1986. Estimated Expiration Date: 
October 29, 2004. 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.
October 29, 2004. 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 1157574 2452219 2805872 3442536 3455579 3569903 3733577 Suction pipe for dust or liquid suction device Pipe connectors Patent #: 4298221 InventorApplicationNo. 06/665996 filed on 10/29/1984US Classes:285/24, Guide and support285/319, Leaf spring285/330, Interlocked or overlapped285/374, Socket285/39, Particular tool-engaging means or with tool285/910, GASKETS285/921SNAP-FITExaminersPrimary: Arola, Dave W.International ClassesF16L 37/098 (20060101)F16L 37/00 (20060101) E21B 17/046 (20060101) E21B 17/02 (20060101) AbstractA threadless nonrotating steel coupling system that is quickly connected and disconnected in an axial manner by simple hand tools, is sealed by a compressible gasket, and is locked together by a pin system to prevent rotation of the male half-coupling relative to the female half-coupling. The coupling is held together by means of matching circular saw-toothed ridges and grooves at right angles to the axis of the coupling, which substitute for the pitched threads used in standard threaded coupling systems. The steel male half-coupling is rigid whereas the steel female half-coupling, which contains a series of spring-loaded and parallel longitudinal fingers, is flexible, since each steel finger is free to move in a radial direction with respect to the axis of the coupling system. | |
