Resin double-helical gear

Details Resin double-helical gear Resin double-helical gear

2011-08-09

2011-08-09

Ridley, Richard W L (Department: 3656)

Machine element or mechanism

Gearing

Teeth

C074S459500

Reexamination Certificate

active

07992462

ABSTRACT:
In a resin double-helical gear formed by injection-molding, smooth meshing of teeth can be performed for rotation of the resin double-helical gear in both directions, and occurrences of thrust-direction load and noise can be prevented.Peak-side tooth flanks7cand7dand valley-side tooth flanks7eand7fof a tooth7in a resin double-helical gear1are formed such as to become farther away from peak-side tooth flanks9cand9dand valley-side tooth flanks9eand9fof a standard tooth9in an inward direction, the closer the peak-side tooth flanks7cand7dand the valley-side tooth flanks7eand7fare to a tooth width direction center section3from one tooth width direction end section4aand another tooth width direction end section4b. As a result, meshing escape sections g (g1and g2) and h (h1and h2) having dimensions in a tooth thickness direction that increase towards the tooth width direction center section3are formed on the peak-side tooth flank side and the valley-side tooth flank side.

REFERENCES:
patent: 6912786 (2005-07-01), Jinkins et al.
patent: 10-315344 (1998-12-01), None

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