Rotatable spindle assembly utilizing two-piece spindle

Details Rotatable spindle assembly utilizing two-piece spindle Rotatable spindle assembly utilizing two-piece spindle

1996-01-23

2000-09-12

Fenstermacher, David M.

Machine element or mechanism

Elements

Cranks and pedals

745942, 280259, 384545, G05G 114

Patent

active

061161144

ABSTRACT:
A light-weight, strong and rigid rotatable spindle assembly utilizing a two-piece spindle suitable for employment in a variety of spindle applications, and in particular in a bicycle crankshaft assembly. Each spindle piece is integrally joined to a crank arm, and this joint, as well as the joint of the crank arm and the pedal tube, is reinforced with gussets. The two spindle pieces themselves are connected by means of a simple allen bolt within the interior of the bottom bracket shell, and this connection is thereby protected from the elements. As the two spindle pieces are pulled together by the allen bolt, they exert opposing forces on the inner race of a cartridge bearing, thereby fixing the lateral location of the spindle within the bottom bracket without exerting pre-load on the bearings. Proper alignment is easily accomplished by means of one or more spacers placed on either side of this inner race of the cartridge bearing. The two-piece spindle arrangement is also suitable for utilization in a bicycle wheel hub assembly or handlebar stem assembly.

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