Method for producing a bellows with oval cross section and appar

Details Method for producing a bellows with oval cross section and appar Method for producing a bellows with oval cross section and appar

1987-05-20

1989-05-09

Jones, David

Metal deforming

By application of fluent medium, or energy field

With actuated tool engaging work

72370, B21D 1506

Patent

active

048277479

ABSTRACT:
After a metallic cylindrical tube is bulged to form a bellows with a circular cross section, this bellows is ovalized to form a bellows with an oval cross section. For this reason, an inexpensive round tube (cylindrical tube) can be used as the material for a bellows with an oval cross section and it is unnecessary to use an expensive oval tube. Accordingly, a bellows with an oval cross section can be produced at low cost.

REFERENCES:
patent: 3091280 (1963-05-01), Yowell et al.
patent: 3625040 (1971-12-01), Gain
patent: 3704983 (1972-12-01), Tellot
patent: 3996783 (1976-12-01), Meserole
patent: 4275579 (1981-06-01), Anoshko et al.
patent: 4319471 (1982-03-01), Benteler et al.
patent: 4571980 (1986-02-01), Goodwin

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