American Cast Iron Pipe Company

Stephen L Deboalt

Randall C Conner

Howard H O'Daniel

Pipe joints and more particularly circular push-on type pipe joints including a flexible gasket having both hard and soft sections and where the hard section has a chamfered outer edge and a 'C'-shaped grooved portion on a side opposite of the chamfered outer edge in which a portion of the soft section fills and is connected to and the soft section is configured to partially overlap a flange on an interior surface of a pipe bell end.

Pipe joint with low insertion load, improved retention and increased high pressure sealing ability gasket and method of manufacture thereof

Pipe joints and more particularly circular push-on type pipe joints including a flexible gasket having both hard and soft portions and where the soft portion overlaps a flange and an inner curved section of the hard portion.

Method of manufacturing a unitary gasket using two rubber materials of different hardness

A method of and rounding devices for inserting an out-of-round pipe spigot into a pipe bell by installing the rounding devices on the open end of the pipe bell. The rounding devices have cam surfaces for engaging the end of the out-of-round spigot and have sufficient strength and stiffness to deform the out-of-round into a substantially circular cross sectional configuration upon application of insertion force between the bell and spigot. The rounding devices may be removed and reused after the bell and spigot joint is assembled.

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Pelham, AL, United States of America

Stephen L Deboalt