Expansible chamber devices – Piston – Open-ended hollow skirt type
Patent
1998-03-18
1999-11-09
Nguyen, Hoang
Expansible chamber devices
Piston
Open-ended hollow skirt type
92227, 92228, 1231936, 29888047, 29888048, F16J 104
Patent
active
059792981
ABSTRACT:
A cast piston having a metal insert that includes a cooling gallery and defines a piston ring groove. The piston insert includes an annular base having an annular cavity formed therein and an annular ring which extends radially outward from the base. A cast piston is fabricated by positioning the piston insert in a piston mold and casting a piston. After the piston is cast, the piston groove ring is machined in a portion of the annular ring and at least one channel is formed between the annular cavity and a bottom portion of the piston. In use, a cooling fluid is directed through the at least one channel and into the annular cavity.
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Article entitled "The development of the Hollow Ring Groove Insert Piston and its Production Technology" by Tatsya Suzuki, Hideo Negishi, Hitoshi Takanashi, and Hideki Otaka of Hino Motors, Ltd., and Masahiro Morita of Izumi Industries, Ltd. No date.
Nguyen Hoang
Zellner Pistons, LLC
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