Metal deforming – By plural tool-couples
Reexamination Certificate
2011-08-02
2011-08-02
Ekiert, Teresa M (Department: 3725)
Metal deforming
By plural tool-couples
C470S041000
Reexamination Certificate
active
07987691
ABSTRACT:
Various embodiments include a method for the manufacturing of washers for locking, each washer having a central hole, a first side comprising a pattern of radially extending teeth and a second side comprising a pattern of radially extending cams, the method comprising forming each washer in successive operations from a washer blank strip, a washer being punched out in a final punching operation. Various embodiments include forming and providing one side of the washer with a flat surface edge zone extending radially outside the pattern of this washer side and punching out the washer with a punch acting against at least a part of said flat surface. Embodiments of the invention also relate to a device for the manufacturing of washers and a washer.
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Ekiert Teresa M
Nord-Lock AB
Schwegman Lundberg & Woessner, P.A.
LandOfFree
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