Apparatus for the manufacture of expansion bellows

Details Apparatus for the manufacture of expansion bellows Apparatus for the manufacture of expansion bellows

1978-05-10

1980-03-18

Gilden, Leon

Metal deforming

By application of fluent medium, or energy field

With actuated tool engaging work

72 62, B21D 1506

Patent

active

041932803

ABSTRACT:
An apparatus for the manufacture, by the hydroforming process, of expansion bellows for pipelines or the like, the apparatus being of the type comprising, for contracting longitudinally a sleeve to be formed, an actuating chamber of annular configuration defined by a rigid sleeve associated with the sleeve to be formed, a cylindrical skirt, and two sealing rings, one of which constitutes one of the supports for the sleeve to be formed. The apparatus is characterized in that the annular chamber is arranged, not outside, but inside the rigid sleeve, in such a manner that the hydroforming circuit is completely separate from the actuating circuit.

REFERENCES:
patent: 2842182 (1958-07-01), Cate
patent: 3091280 (1963-05-01), Yowell et al.
patent: 3704983 (1972-12-01), Tellot
patent: 4065947 (1978-01-01), Mazier

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