Machine element or mechanism – Elements – Cranks and wrist pins
Reexamination Certificate
2006-11-28
2006-11-28
Luong, Vinh T. (Department: 3682)
Machine element or mechanism
Elements
Cranks and wrist pins
C074S597000, C029S888080
Reexamination Certificate
active
07140272
ABSTRACT:
In an assembly type crankshaft, a press-in plug member for assembly of its crank pin is set to be shorter than the width of the crank web, allowing the press-in force of the plug member to be reduced and the weight of the crank pin into which the plug member is pressed to be reduced. The crank pin of the crankshaft and the crank web, that have been fabricated as separate members, are made integral with each other by pressing the crank pin into a pin hole formed in the crank web. As a result, the crankshaft is assembled. Thus, after the assembly, the plug member whose length is shorter than the width of the crank web is pressed in, a firm crankshaft can be obtained. Further, since the plug member employed has a cross-sectional shape that is elliptical or oval-shaped, the above-described press-in can be performed more firmly.
REFERENCES:
patent: 1783825 (1930-12-01), Brown et al.
patent: 1950009 (1934-03-01), Newman
patent: 2364109 (1944-12-01), Taylor
patent: 2471982 (1949-05-01), Shulda
patent: 3147638 (1964-09-01), Rice
patent: 4546670 (1985-10-01), Gaspardo
patent: 5009124 (1991-04-01), Beaurepaire et al.
patent: 5207120 (1993-05-01), Arnold et al.
patent: 0 491 222 (1991-12-01), None
patent: 60037411 (1985-02-01), None
PTO: 2006-3875, US Patent & Trademark Office, Translation of Nakajima et al. (JP 60-37411) dated May 4, 2006.
Birch & Stewart Kolasch & Birch, LLP
Honda Giken Kogyo Kabushiki Kaisha
Luong Vinh T.
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