Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging
Reexamination Certificate
2008-05-20
2009-12-22
Tolan, Edward (Department: 3725)
Metal deforming
By use of closed-die and coacting work-forcer
Forcing work into or within closed die; e.g., forging
C072S354800
Reexamination Certificate
active
07634934
ABSTRACT:
A machine, method and tooling to precision cold-form roller blanks for anti-friction bearings. The machine is a multistage progressive former using floating die cavities to enable simultaneous shaping of the ends of the roller with high accuracy and without flash. The tools and staged forming create an improved roller with an advantageous grain pattern and devoid of structural defects previously attributable to the presence of sheared end face material in the radiused corners of the blank and flash at its mid-section.
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Notification of Transmittal of the International Search Report and The Written Opinion of the International Searching Authority, or the Declaration, dated Aug. 22, 2008, received in PCT/US05/24637, filed Jul. 12, 2005.
Bordner Mark W.
Krintzline Donald E.
National Machinery LLC
Pearne & Gordon LLP
Tolan Edward
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