Speed change device for power tool

Details Speed change device for power tool Speed change device for power tool

1998-10-22

2000-08-22

Fenstermacher, David M.

Machine element or mechanism

Gearing

Directly cooperating gears

74342, 192 6961, 192 698, F16H 112

Patent

active

06105450&

ABSTRACT:
A speed change device, preferably for a power tool, may include a first drive gear and a second drive gear mounted on a drive shaft, and may include a first driven gear and a second driven gear mounted on a driven shaft. When the second drive gear is in a first position, a first gear portion of the second drive gear engages the second driven gear, so that the rotational energy of the drive shaft is transmitted to the driven shaft via a first transmission path through the second drive gear and the second driven gear. When the second drive gear is in a second position, a second gear portion of the second drive gear engages the first drive gear, so that the rotational energy of the drive shaft is transmitted to the driven shaft via a second transmission path through the second drive gear, the first drive gear and the first driven gear.

REFERENCES:
patent: 1876616 (1932-09-01), Connell
patent: 2065753 (1936-12-01), Schmitter et al.
patent: 2531849 (1950-11-01), Karleen
patent: 2942490 (1960-06-01), Riley, Jr. et al.
patent: 4159050 (1979-06-01), Hopkins, Sr. et al.
patent: 4823632 (1989-04-01), Harrod et al.
patent: 5019023 (1991-05-01), Kurosawa

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