Planetary gearbox

Details Planetary gearbox Planetary gearbox

2005-09-23

2008-08-05

Marmor, Charles A (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

With synchronizing clutch or brake

C475S298000, C173S216000

Reexamination Certificate

active

07407460

ABSTRACT:
A planetary gearbox for a power tool has a planetary carrier and a rotatable sleeve with sun wheel toothing arranged centrally on the planetary carrier. The sleeve has a radial section with outer toothing. Planet wheels are positioned between planetary carrier and radial section and mesh with the sun wheel toothing. A switching ring gear surrounds the planet wheels and has an inner toothing meshing with the planet wheels. The switching ring gear is axiallay moveable on the planet wheels between first and second end positions for switching a transmission ratio. In the second end position the switching ring gear engages the outer toothing of the radial section. A synchronization disk, rotating with the rotary sleeve, is positioned between planet wheels and radial section and acts directly or indirectly by friction on the switching ring gear when the latter is moved from the first into the second end position.

REFERENCES:
patent: 4821591 (1989-04-01), Adler
patent: 6572506 (2003-06-01), Williams et al.
patent: 42 13 291 (1993-10-01), None

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