Metal working – Method of mechanical manufacture – Gear making
Reexamination Certificate
2007-01-16
2009-12-22
Cozart, Jermie E (Department: 3726)
Metal working
Method of mechanical manufacture
Gear making
C029S893330, C072S352000, C072S354600, C072S355200
Reexamination Certificate
active
07634857
ABSTRACT:
A sprocket is formed by fine-blanking a steel plate using a die having a cutting edge shaped to produce rounded edges on the back sides of the sprocket tooth heads, and protrusions on the front sides. Thereafter the edges of the front sides of the sprocket tooth heads are formed in a press so that the protrusions are removed, and the edges of the front sides of the sprocket tooth heads have a rounded cross-sectional shape substantially the same as that of the edges of the front sides.
REFERENCES:
patent: 2224993 (1940-12-01), Swift et al.
patent: 3796085 (1974-03-01), Fisher et al.
patent: 4248075 (1981-02-01), Whitley
patent: 4569263 (1986-02-01), Kravets
patent: 4876876 (1989-10-01), Ishida et al.
patent: 6209381 (2001-04-01), Yaguchi et al.
patent: 6370931 (2002-04-01), Bennett
patent: 6729172 (2004-05-01), Aizaki
patent: 7526862 (2009-05-01), Leveque et al.
patent: 2006/0042341 (2006-03-01), Nishibu
patent: 58074231 (1983-05-01), None
patent: 2002-001449 (2002-01-01), None
Ueki Takashi
Yamamoto Katsuhiro
Cozart Jermie E
Howson & Howson LLP
Tsubakimoto Chain Co.
Walters Ryan J
Yamamoto Seisakusho Co., Ltd.
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