Tube expander

Details Tube expander Tube expander

1980-09-02

1981-11-24

Pavelko, Thomas P.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Rod or tubular preform

B29D 2300

Patent

active

043021760

ABSTRACT:
A device for expanding flexible tubes and similar elastic articles including a cable, hydraulic or air actuated cam coupled to move projecting fingers for expanding the elastic article. The device includes a housing pivotally mounting two opposed parallel blocks, each of which includes a cam follower surface and a projecting finger. Initially, the spreading finger elements are inserted into a tube or other elastic article and the cam is moved against the cam follower to pivot the blocks away from one another. At that time, the attached fingers also rotate away from one another and act to expand the tube or elastic article. The housing is constructed to enable the cam and drive to be interchanged for cable, hydraulic, or air cylinder actuation.

REFERENCES:
patent: 544268 (1895-08-01), Unsinger
patent: 1748765 (1930-02-01), Hellermann
patent: 2236936 (1941-04-01), Camp
patent: 2422065 (1947-06-01), Anselmi
patent: 2906226 (1959-09-01), Myrick
patent: 2931096 (1960-05-01), Brudney
patent: 3281927 (1966-11-01), Buslaff
patent: 3553780 (1971-01-01), Kuhlemann
patent: 3861847 (1975-01-01), Barnett

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