Internal-combustion engines – Frame construction – Horizontal cylinder
Reexamination Certificate
2005-12-06
2005-12-06
Dolinar, Andrew M. (Department: 3747)
Internal-combustion engines
Frame construction
Horizontal cylinder
C411S392000, C411S395000
Reexamination Certificate
active
06971362
ABSTRACT:
A threaded fastener is configured to reduce stress experienced at a female threaded portion of a hole formed in an engine block, when the threaded fastener is inserted therein, and when an axial load is applied thereto. In a particular application, a crankshaft is supported between a top supporting wall of a crankcase and a bottom supporting wall of a main cap. The inventive bolt includes a hollowed-out male threaded portion, which fits into a hole in the top supporting wall. The male threaded portion includes an elastically deformable low-rigidity portion, in which a cylindrical hole is concentrically formed. The maximum allowable stress of the top supporting wall is less than that of the bolt, due to material considerations. The low-rigidity portion is placed overlapping the female threaded portion in the axial direction, and since it is elastically deformable, it helps alleviate the stress experienced by the female threaded portion.
REFERENCES:
patent: 1784377 (1930-12-01), Moore
patent: 2111796 (1938-03-01), Meader
patent: 2542377 (1951-02-01), Turkish
patent: 6374815 (2002-04-01), Ness et al.
patent: 3016308 (1989-10-01), None
patent: 1-143418 (1995-07-01), None
Gunji Toru
Kawakubo Hiroyuki
Otsuka Hisao
Blackman William D.
Carrier Joseph P.
Carrier Blackman & Associates P.C.
Dolinar Andrew M.
Honda Motor Co. Ltd.
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