Metal deforming – With cutting – By composite tool
Patent
1977-08-03
1979-01-02
Larson, Lowell A.
Metal deforming
With cutting
By composite tool
83 36, 83 39, 113116V, B21D 2800
Patent
active
041321030
ABSTRACT:
The invention relates to annular diaphragms for example for use in clutches, comprising a peripheral portion forming a Belleville washer and a central portion fragmented by slots into radial segments. By means of the method according to the invention, in order to obtain a reduced width for the open end of the slots, the two edges of the slots are produced in two separate operations, namely a first cutting operation in the course of which one of these edges is first formed and then a second cutting operation in the course of which the other edge is formed.
REFERENCES:
patent: 3235049 (1966-02-01), Hufstader
patent: 3416211 (1968-12-01), Ahlman
Brown Charles E.
Larson Lowell A.
Societe Anonyme Francaise du Ferodo
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