Metal deforming – With cutting – By composite tool
Patent
1979-06-11
1985-02-19
Crane, Daniel C.
Metal deforming
With cutting
By composite tool
72324, 72370, 83184, B21D 2828, B21D 3102
Patent
active
044997493
ABSTRACT:
A tube perforator is provided which has a generally cylindrical mandrel which extends within a tube. The mandrel is hollow and has a passage therein which extends in angular relation to the axis of the mandrel and exits on one side thereof. A punch disposed in the passage can be driven against the tube wall to cause perforation thereof.
REFERENCES:
patent: 1432073 (1922-10-01), Lowy
patent: 1588200 (1926-06-01), Skelton
patent: 3271988 (1966-09-01), Klinksier
Hay, II Robert A.
Krause Brian W.
Crane Daniel C.
Ingraham R. B.
The Dow Chemical Company
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