Snap in place gasket installation method

Metal working – Method of mechanical manufacture – Assembling or joining

Reexamination Certificate

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Details

C029S453000, C029S270000, C029S284000, C277S602000, C277S939000, C277S944000

Reexamination Certificate

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11220054

ABSTRACT:
A pipe sealing gasket is shown which is designed to be received within a groove provided within a belled, socket end of a plastic pipe. The groove in the plastic pipe is preformed during manufacture and the gasket is installed thereafter. The gasket nominal diameter exceeds the internal diameter of the belled pipe end. A special installation tool is used to pull the gasket from an initially deformed, elliptical shape to a normal cylindrical shape. The installation tool uses only one fluid cylinder for power and can be hand installed and operated.

REFERENCES:
patent: 1504037 (1924-08-01), Furman et al.
patent: 3776682 (1973-12-01), Parmann
patent: 3884612 (1975-05-01), Parmann
patent: 3887992 (1975-06-01), Parmann
patent: 3929958 (1975-12-01), Parmann
patent: 3965715 (1976-06-01), Parmann
patent: 4030872 (1977-06-01), Parmann
patent: 4061459 (1977-12-01), Parmann
patent: 4120521 (1978-10-01), Parmann
patent: 5233740 (1993-08-01), Chen
patent: 6044539 (2000-04-01), Guzowski
patent: 6397447 (2002-06-01), Christopherson et al.
patent: 6658711 (2003-12-01), Benson

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