Method of fabricating a rear fork assembly for a bicycle and dro

Details Method of fabricating a rear fork assembly for a bicycle and dro Method of fabricating a rear fork assembly for a bicycle and dro

1988-04-04

1989-03-21

Godici, Nicholas P.

Metal fusion bonding

Process

With shaping

228182, 280288, 2802883, 285286, 285287, D12111, B62K 1920, B23K 3300

Patent

active

048135917

ABSTRACT:
A method for fabricating a rear fork assembly for a bycycle includes the steps of: (1) making seat stay tubes and chain stay tubes and drop outs as separate components with universally pivotable, abuttable joints between the stay tubes and mating portions of the drop outs; (b) clamping these components at a predetermined angular relationship; and (c) welding the joints to fix them in that predetermined angular relationship. In one embodiment, the joints are ball and socket type and the seat stay tubes are connected to the seat tube through an inverted U-shaped yoke and a straight yoke tube with modified ball and socket type joints at the top and bottom of the yoke. In another embodiment, the seat stay tubes are connected directly between the drop outs and the yoke tube. One embodiment has convex or ball-shaped surfaces on the drop outs engageable with annular or concave curved end surfaces on the seat stay tubes; another has concave, curved portions on the drop outs engageable with convex or ball-shaped ends on the stay tubes.

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patent: 4081189 (1978-03-01), Dumas
patent: 4723786 (1988-02-01), Buchanan
patent: 4728113 (1988-03-01), Thun, Jr.

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