Internal-combustion engines – Rotating cylinder – Parallel to shaft
Reexamination Certificate
2008-05-27
2008-05-27
Cronin, Stephen K. (Department: 3747)
Internal-combustion engines
Rotating cylinder
Parallel to shaft
C123S0480AA, C123S056400, C123S0780AA, C091S505000, C092S082000
Reexamination Certificate
active
07377238
ABSTRACT:
A variable compression ratio device of an internal combustion engine includes a piston inner part connected to a connecting rod and a piston outer part fitted on an outer periphery of the piston inner part. The piston outer part is only slidably in an axial direction, and is movable between a low compression ratio position near the piston inner part and a high compression ratio position near the combustion chamber. A skirt part is slidable and is guided by an inner peripheral surface of a cylinder bore of an engine. The skirt part is integrally formed on the piston inner part. A peripheral wall of the piston outer part is terminated directly above the skirt part. Thus, switching of the position between the low compression ratio position and the high compression ratio position by an inertia force of the piston outer part is performed smoothly with a reduction in weight of the piston.
REFERENCES:
patent: 2376214 (1945-05-01), Webster
patent: 3156162 (1964-11-01), Wallace et al.
patent: 5476074 (1995-12-01), Boggs et al.
patent: 7066118 (2006-06-01), Hirano
patent: 2004/0231619 (2004-11-01), Hirano
patent: 2004-44512 (2004-02-01), None
Ishikawa Seiichiro
Kondo Takashi
Yoshida Kazuo
Birch & Stewart Kolasch & Birch, LLP
Coleman Keith
Cronin Stephen K.
Honda Motor Co. Ltd.
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