Radius Systems Limited

Mario John Christodoulou

Derek John Muckle

Lawrence Adam Faulkner Richards

Colin Hughes

Jeffrey Richard Utting

A moulded electrofusion fitting for connection to a plastics pipeline comprises a hollow body formed with a tubular opening that has a longitudinal axis and is adapted to receive and end of the pipeline as a close sliding fit. An electrofusion element is formed in the internal surface in the opening, spaced from its end. Fingers are on the end of the opening, circumferentially spaced around the opening and separated by slots between them. Cam surfaces in the form of ribs are defined on the fingers, and a grip ring is received on the fingers and includes wedge elements in the form of grooves. These are adapted to fit the ribs so that, when a pipeline is inserted in the opening and the grip ring is rotated about said axis, the ribs and grooves engage to press the fingers radially inwardly against the reaction of the grip ring, whereby said pipe is gripped by said grip ring and centralized in the opening. The grip ring may be integrated with a terminal pin, a bayonet slot of the grip ring accommodating the terminal pin, a shroud boss formed on the grip ring around the base of the bayonet slot.

Electrofusion fitting

A tapping tee assembly () comprises an integrally moulded saddle (), body () and socket (). The tapping tee assembly can be mounted on a pipeline thereby enabling a cutter to travel through the body of the fitting in order to cut a hole in the pipeline. The saddle () is provided with a saddle-shaped electrofusion element mat () and the socket (), which is integral with the body () and in fluid connection with the axial bore () of the body, is provided with a second electrofusion element (). The electrofusion elements () are connected by an integrated anvil-shaped connector () and connecting pin () such that both electrofusion elements () can be energized simultaneously using two electrical terminals (), and the device can be manufactured with relative ease.

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Nottinghamshire, United Kingdom

Mario John Christodoulou