Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2007-06-08
2010-12-07
Chang, Ching (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090150, C123S090310
Reexamination Certificate
active
07845320
ABSTRACT:
An adjustable camshaft sprocket assembly includes a hub and a sprocket body secured to the hub. A stud-receiving opening is defined in one of the hub flange and the sprocket body, and a tool-receiving opening is defined in the other of the hub flange and the sprocket body. The tool-receiving opening is aligned with the stud-receiving opening is adapted to receive a body portion of an adjustment tool, and the stud-receiving opening is adapted to receive an eccentric stud of the adjustment tool. Either the stud-receiving opening or the tool-receiving opening is elongated. Rotation of the adjustment tool when its body is located in the tool-receiving opening and its eccentric stud is located in the stud-receiving opening causes relative angular movement between the hub and the sprocket body. One or more fasteners are used to immovably secure the sprocket body to the hub after adjustment. A tool includes cylindrical base, a driving head, and an eccentric stud. The stud comprises a spring pin press-fit into a bore.
REFERENCES:
patent: 3128653 (1964-04-01), Service et al.
patent: 5174169 (1992-12-01), Allen
patent: 5495776 (1996-03-01), Allen
patent: 5645024 (1997-07-01), Allen et al.
patent: 6532923 (2003-03-01), Woodward et al.
patent: 6532932 (2003-03-01), Strauss
“SA Gear Adjustable Timing Chain Set” as shown in CNC-Motorsports.com website print-outs, pp. 1-2, (Product Introduction Date believed to be in 2003 or before).
Chang Ching
Cloyes Gear and Products, Inc.
Fay Sharpe LLP
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