Snap in place gasket for sealing plastic pipelines and...

Seal for a joint or juncture – Seal between fixed parts or static contact against... – Contact seal for a pipe – conduit – or cable

Reexamination Certificate

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C277S609000, C277S611000, C277S615000, C277S626000, C277S639000, C277S644000

Reexamination Certificate

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07461848

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: 3390890 (1968-07-01), Kurtz
patent: 4368894 (1983-01-01), Parmann
patent: 4487421 (1984-12-01), Housas et al.
patent: 4510664 (1985-04-01), Lock
patent: 4641858 (1987-02-01), Roux
patent: 4871180 (1989-10-01), Preisendorfer
patent: 5067751 (1991-11-01), Walworth et al.
patent: 5324083 (1994-06-01), Vogelsang
patent: 6152494 (2000-11-01), Corbett et al.
patent: 6173967 (2001-01-01), Eskew et al.

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