Apparatus and process for selectively expanding to join one tube

Metal working – Method of mechanical manufacture – Assembling or joining

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29727, 72 58, 72 62, B21D 3900, B21D 3908, B21D 2210, B23P 1526

Patent

active

046851917

ABSTRACT:
An apparatus and process for expanding a tube at selective points about its circumference to join another tube. After a segment of a first tube is inserted into a second tube having an end sleeve segment with a larger diameter and wall thickness than the first tube, compression and subsequent radial expansion of elastomeric bars lodged along the generally open sides of a bushing located within the first tube end segment cause the elastomeric bars to radially expand the wall of the first tube. The wall of the first tube expands at selective points against the wall of the second tube in proximity to their respective ends, creating a selective interference fit therebetween.

REFERENCES:
patent: 1930745 (1933-10-01), Fisher
patent: 2704104 (1955-03-01), Mueller
patent: 4006619 (1977-02-01), Anderson
patent: 4068372 (1978-01-01), Kamohara et al.
patent: 4320568 (1982-03-01), Herrod et al.
patent: 4388752 (1983-06-01), Vinciguerra et al.
patent: 4418457 (1983-12-01), Mueller
patent: 4420866 (1983-12-01), Mueller
patent: 4567631 (1986-02-01), Kelly

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