Engine cast component having witness marks and method of...

Details Engine cast component having witness marks and method of... Engine cast component having witness marks and method of...

2007-07-03

2007-07-03

Kamen, Noah P. (Department: 3747)

Internal-combustion engines

Frame construction

Horizontal cylinder

C123S00100A

Reexamination Certificate

active

11463208

ABSTRACT:
A component (100) for an internal combustion engine includes a plurality of as-cast features (e.g.116) formed thereon, and a plurality of machined features (e.g.120). The component (100) also includes at least one witness mark (128), the witness mark (128) including a cavity (202) surrounded by a first lateral surface (204), a first inclined surface (208), a second inclined surface (210), and a valley surface (212). The at least one witness mark (128) is formed during a casting operation, and is used to locate the component (100) on a fixture (300). The plurality of machined features (120) do not encroach onto an area of the at least one witness mark (128). The first inclined surface (208) and the second inclined surface (210) are at an angle (α) with respect to each other.

REFERENCES:
patent: 7021263 (2006-04-01), Agnew et al.

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