Metal deforming – With cutting – Machining after final metal-deforming
Patent
1994-05-10
1995-11-07
Crane, Daniel C.
Metal deforming
With cutting
Machining after final metal-deforming
72356, 72377, 723792, 2989333, B21D 5328
Patent
active
054638917
ABSTRACT:
A method for producing ratchet devices, the method including the steps of forming a circular recess in a blank metal plate by drawing, compressing the metal plate in a pair of dies so as to reduce the depth of the recess and thicken the side wall thereof, and forming ratchet teeth on and along the inner annular surface of the side wall of the recess.
REFERENCES:
patent: 2639495 (1953-05-01), Voslamber
patent: 2654944 (1953-10-01), Wilson
patent: 4275924 (1981-06-01), Lehmann
Crane Daniel C.
Kabushiki Kaisha Hasegawa Seiko
Maruei Kogyo Kabushiki Kaisha
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