Tube expander utilizing hydraulically actuated pistons

Details Tube expander utilizing hydraulically actuated pistons Tube expander utilizing hydraulically actuated pistons

1975-08-07

1977-02-08

Gilden, Leon

Metal deforming

By application of fluent medium, or energy field

72 58, B21D 2210

Patent

active

040066193

ABSTRACT:
An apparatus for expanding a tube or pipe by axially compressing an annular resilient element to cause said element to radially expand into engagement with the inner surface of the tube or pipe. The compressing of the resilient element and its radial expansion is caused by a main piston and cylinder structure which is subjected to fluid under pressure. A secondary or impact piston is provided in the main piston for applying higher stresses to the tube or pipe through the resilient element. The resilient element is interposed between a plurality of spaced annular ring members which constitute guide means therefor.

REFERENCES:
patent: 701549 (1902-06-01), Deerins
patent: 1548730 (1925-08-01), Mirfield
patent: 2370840 (1945-03-01), Carlson
patent: 2458854 (1949-01-01), Hull et al.
patent: 2796109 (1957-06-01), Wood

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