US Patent: 5,269,733
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| Power Tool Plastic Gear Train
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Patentee:
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| Philip M. Anthony (exact or similar names) - Lindenhurst, IL |
| USPTO Classifications: |
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173/171, 408/124, 475/149, 475/317, 475/331, 475/345, 475/902, 74/7E, 74/DIG.10, 81/57.11, 81/57.31
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| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 18, 1992 |
| Granted: |
Dec. 14, 1993 |
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Stan Schulz
Snap-On Tools Company History
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Description: |
| Emrich & Dithmar - patent attorneys
Abstract
A power tool with a two-part housing has a drive motor with a pinion gear on the motor shaft. A plastic cylindrical ring gear is fixed to the motor in coaxial surrounding relationship with the pinion gear and has attachment lugs which fit between the two parts of the tool housing and are fixedly secured to each. A plastic gear carrier frame is insert molded on a splined end of a metal output shaft and is receivable within the ring gear and has radial slots for respectively receiving pins which respectively rotatably mount three planet gears in meshing engagement with the pinion gear and the ring gear. The carrier frame has a hollow stub shaft portion which receives the pinion gear therethrough, the stub shaft portion having an elastomeric O-ring seated in a circumferential groove therein for press-fitting a ball bearing thereon, the ball bearing being in turn press-fitted in a seat in the ring gear to support the planet gear assembly.
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