Klein Bicycle Corporation

Sean O'Connor

Darrell W Voss

Gary G Klein

Lonney Pauls

A bicycle frame having improved fatigue life of the frame. Cable entry/exit points for internally routed control cables are formed to produce strategically reduced stiffness zones so as to reduce peak stresses in the frame. Preferably, dimples are formed in the bicycle frame tubes with bulkhead walls deformed at an angle between 45 and 90 degrees and transverse to a line through the axial center of the tubes. Cable access holes formed in the bulkhead have a low friction plastic insert cable guide retained in the hole to provide aesthetic enhancement and weather seal for the tubing.

Cable guide for bicycle frames and method for increasing frame strength

Improved cable guide for bicycle frames which has been found useful for improving the fatigue life of light weight bicycle frames and other stressed tubular structures. One or more welding or brazing-free dimple/bulkhead forming deformations produce strategically reduced stiffness zones so as to reduce peak stresses. The cable guide system also offers an improved method for routing control cables through the frame structure. A plastic cable nozzle insert is disclosed along with pyramid-shaped external dimples and contiguous bulkheads.

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Rochester, WA, United States of America

Sean O'Connor