Tongue and groove snap-fit pipe coupling
Patent 5007666 Issued on April 16, 1991. Estimated Expiration Date: 
January 19, 2010. 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.
January 19, 2010. 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 1866672 3229998 3771820 3865662 Pipe coupling Repair device for pipes Pipe coupling Flexible plastic foam with a groove- and tongue-like closing system Patent #: 4576846 InventorAssigneeApplicationNo. 467190 filed on 01/19/1990US Classes:285/373, Longitudinally divided138/99, External138/162, Tongue and slot138/166, With tongue in slot285/15, REPAIR285/133.11, T-type285/182, Nesting parts285/419, Longitudinally divided285/423, Nonmetallic285/921SNAP-FITExaminersPrimary: Kundrat, Andrew V.Assistant: Aberle, Timothy Attorney, Agent or FirmInternational ClassF16L 047/06AbstractA pipe fitting for encompassing a conduit comprising a pair of interlocking segments with each segment comprising an arcuate configuration having at least two longitudinal edges with one edge of each segment comprising a tongue split longitudinally thereof in a direction substantially perpendicular to its length. The other of the edges comprising a groove conforming to and receiving the tongue formed on the juxtapositioned edge of the other of the segments. The tongue when forced into the opening in the groove in the other of the segments causing its two parts to engage each other along the length of the slot and when in the groove to again separate causing the tongue to interlock with the periphery of the groove thereby interlocking the segments of the pipe fitting together. | |
