Expansible chamber devices – Piston – With ported chamber in piston part for circulating heat...
Reexamination Certificate
2006-12-01
2009-08-25
Leslie, Michael (Department: 3745)
Expansible chamber devices
Piston
With ported chamber in piston part for circulating heat...
C092S231000, C029S888042
Reexamination Certificate
active
07578229
ABSTRACT:
A piston and method of making a piston which involves providing a single piece piston blank that, after casting or forging, is separated into separate upper and lower portions. The upper portion is machined to develop a piston head having that includes a cooling gallery portion and the lower portion is machined to develop a piston body having a cooling gallery portion, a skirt and a pair of opposed pin bores. After machining the piston head and piston body are attached together and the resulting assembly is machine finished into a finished piston.
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Butzel Long
Karl Schmidt Unisia, Inc.
Leslie Michael
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