Land vehicles – Wheeled – Occupant propelled type
Patent
1988-06-03
1989-12-19
Mitchell, David M.
Land vehicles
Wheeled
Occupant propelled type
280279, 403359, B62K 1932
Patent
active
048878286
ABSTRACT:
A fork stem is formed of material having large hardness while a fork shoulder is formed of material having hardness smaller than that of the fork stem. A plurality of projection lines are formed in an end of the fork stem. The end is forcedly inserted into a through hole of the fork shoulder and an expansion portion is formed in the end forcedly inserted into the through hole to prevent the fork stem from getting out from the through hole.
REFERENCES:
patent: 2960342 (1960-11-01), Raper
patent: 4728216 (1988-03-01), Disborg
McGrehan Donn
Mitchell David M.
Sakae Ringyo Co., Ltd.
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