Machine element or mechanism – Gearing – Directly cooperating gears
Patent
1993-04-29
1994-11-15
Laub, David W.
Machine element or mechanism
Gearing
Directly cooperating gears
74DIG10, F16H 116
Patent
active
053637135
ABSTRACT:
A quieted motorized servoactuator with a sub-fractional horsepower high rpm, low voltage motor driving a gear train with about 900:1 reduction overall. The motor shaft has a metal worm meshing with a first stage thermoplastic elastomeric material, preferably polyamide polyester, of a hardness not greater than 72 on the Shore "D" scale. The first stage gear has an integral pinion meshed with a second stage gear of harder thermoplastic material, preferably acetal. The second stage gear has an integral pinion meshed with an output sector gear formed of harder thermoplastic material preferably comprising polyamide filled one-third by volume with fine glass particles.
REFERENCES:
patent: 4226136 (1980-10-01), Porter et al.
patent: 4616164 (1986-10-01), Kenney et al.
patent: 4931710 (1990-06-01), De Vara et al.
patent: 5062611 (1991-11-01), Hatton
patent: 5255891 (1993-10-01), Pearson et al.
Eaton Corporation
Johnston Roger A.
Laub David W.
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