Method of, and apparatus for, manufacturing metallic bellows

Details Method of, and apparatus for, manufacturing metallic bellows Method of, and apparatus for, manufacturing metallic bellows

2007-12-20

2011-11-01

Bryant, David (Department: 3726)

Metal working

Method of mechanical manufacture

Muffler, manifold or exhaust pipe making

C029S454000, C029S890045, C072S059000, C072S110000

Reexamination Certificate

active

08046916

ABSTRACT:
A metallic bellows is manufactured by a first step of bulging a straight raw pipe into a primary formed body having formed on a periphery thereof a corrugated bellows section, and a second step of subjecting at least one of crest portions and trough portions of the bellows section of the primary formed body to roll machining by means of a pair of forming rolls.

REFERENCES:
patent: 2358291 (1944-09-01), Fentress
patent: 2663324 (1953-12-01), Fentress
patent: 2685305 (1954-08-01), Woods
patent: 3595049 (1971-07-01), Holt
patent: 54-94469 (1979-07-01), None
patent: 56-068535 (1981-06-01), None
patent: 57-009548 (1982-01-01), None
patent: 09-001249 (1997-01-01), None
Notification of Rejection Reasons for Japanese Patent App. No. 2006-344783 (Jun. 15, 2010).

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