Bicycle frame alignment tool

Details Bicycle frame alignment tool Bicycle frame alignment tool

1988-09-01

1989-09-26

Haroian, Harry N.

Geometrical instruments

Gauge

Automotive

33286, 33533, 3320319, 33645, G01B 525

Patent

active

048689939

ABSTRACT:
A tool for checking the alignment of bicycle frames includes threaded sleeves for threading into the bottom bracket shell of the bicycle frame, and a gauge bar adapted to be held in contact with the sleeve. The sleeve and the gauge bar have precisely machined engagement surfaces so that when assembled and clamped together, for example by a vise, the gauge bar is held precisely perpendicular to the central movement, i.e., bottom bracket, of the bicycle frame, with the gauge bar positioned to extend along the down tube or seat tube of the bicycle frame so that any deviations thereof from perpendicularity with the central movement can be measured.

REFERENCES:
patent: 1240528 (1917-09-01), Alsworth
patent: 4096636 (1978-06-01), Little
patent: 4432144 (1984-02-01), Carlsson
patent: 4506447 (1985-03-01), Lob
patent: 4594787 (1986-06-01), Nagano
Park Tool Co. catalog, p. 7 (no date).
New England Cycling Academy (NECA) catalog, 1986, pp. 1-5.
"The NECA Frame Alignment Systems", Rich Carlson, Bike Tech Newsletter, vol. 5, No. 3, Fall 1986 (title page and pp. 5-9).

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