Rear derailleur hanger alignment tool

Details Rear derailleur hanger alignment tool Rear derailleur hanger alignment tool

2007-07-26

2008-12-23

Bennett, G. Bradley (Department: 2841)

Geometrical instruments

Gauge

Straightness, flatness, or alignment

Reexamination Certificate

active

07467477

ABSTRACT:
A rear derailleur hanger alignment tool is provided with hanger attachment structure, an elongated main arm, a movable body, an indicator and an indicator positioning structure. The hanger attachment structure is attachable to a rear derailleur hanger. The movable body is movably coupled to the elongated main arm between first and second ends of the elongated main arm to slide axially along a longitudinal axis of the elongated main arm and to rotate about the longitudinal axis of the elongated main arm. The indicator is movably coupled to the movable body to move perpendicular to the longitudinal axis of the elongated main arm. The indicator positioning structure is operatively formed between the movable body and the elongated main arm to selectively maintain the indicator in a predetermined angular position with respect to the longitudinal axis of the elongated main arm.

REFERENCES:
patent: 3925873 (1975-12-01), Mecum
patent: 4286953 (1981-09-01), Shimano
patent: 4868993 (1989-09-01), Kvale
patent: 5346434 (1994-09-01), Hsu
patent: 5694699 (1997-12-01), Folson
patent: 2001/0009070 (2001-07-01), Lovesy
patent: 2003/0083163 (2003-05-01), Nanko
patent: 2008/0196263 (2008-08-01), Okura et al.
Park Tool; Derailleur Hanger Alignment Gauge DAG-1; prior to Jul. 2007; www.parktool.com, St. Paul, MN, USA.

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