Machine element or mechanism – Gearing
Patent
1989-10-10
1991-08-27
Herrmann, Allan D.
Machine element or mechanism
Gearing
74 63, 475168, F16H 3702
Patent
active
050423223
ABSTRACT:
In a harmonic drive arrangement wherein two relatively rotatable members are provided with oppositely arranged gear structures of different numbers of teeth such that the gear structures define therebetween wedge cavities of circumferentially varying cross sections, engagement balls are disposed in the wedge cavities and a biasing structure extends around the gear structure so as to be adapted to bias the balls sequentially inwardly into said wedge cavities and release them outwardly thereby causing relative motion of the two rotatable members.
REFERENCES:
patent: 2959065 (1960-11-01), Musser
patent: 3200668 (1965-08-01), Janes
patent: 3714848 (1973-02-01), Hofmann
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