Automatic variable transmission for power tool
AssigneeBlack & Decker Inc.
InventorMike F. Cannaliato
Life of this patent
Estimating the term…
Abstract
An automatic transmission (30) for a power tool includes reduction gearing (42-58) coupled between a motor (24) and an output member (28). A mechanism for adjusting speed (60) of the output member (28) is coupled with the reduction gearing (42-58). The mechanism for adjusting speed (60) is slidably biased such that upon change in torque, the mechanism for adjusting speed (60) moves which, in turn, engages and disengages the reduction gearing (42-58) to vary the speed of the output member (28) between a first and second speed.
Claims41
An automatic transmission for a power tool comprising:
- a transmission housing;
- a gear reduction mechanism positioned in said housing to be coupled with a motor;
- output means for rotating at a desired speed, said output means coupled with said gear reduction mechanism;
- and
- means for adjusting speed of said output means, said means for adjusting speed coupled with said gear reduction mechanism, said means for adjusting speed biased and coupled with said housing such that upon change in torque said means for adjusting speed moves in said housing moving said gear reduction mechanism for varying speeds of said output means.
A power tool comprising:
- a tool housing;
- a motor in said housing;
- a power source for energizing said motor;
- an output means coupled with said motor for moving at a desired speed;
- and
- an automatic transmission for coupling said motor with said output means;
- said automatic transmission including:
- a transmission housing;
- a gear reduction mechanism positioned in said housing and coupled with said output means;
- output spindle for rotating at a desired speed, said output spindle coupled with said gear reduction mechanism;
- and
- means for adjusting speed of said output means, said means for adjusting speed coupled with said gear reduction mechanism, said means for adjusting speed biased and coupled with said housing such that upon change in torque said means for adjusting speed moves in said housing moving said gear reduction mechanism for varying speeds of said output means.
A power tool comprising:
- a transmission housing;
- a gear reduction mechanism positioned in said housing to be coupled with a motor, said gear reduction mechanism includes at least two reduction gears and two reduction gear carriers;
- output means for rotating at a desired speed, said output means coupled with said gear reduction mechanism;
- and
- means for adjusting speed of said output means, said means for adjusting speed coupled with one of said gear reduction carriers or gears, said means for adjusting speed biased and coupled with said housing such that upon change in torque said means for adjusting speed moves in said housing connecting and disconnecting said mating surfaces;
- said gear reduction mechanism includes at least two reduction gears and two reduction gear carriers, one of said reduction gear carriers including mating surfaces for connecting and disconnecting with one of said two reduction gears.
Dependencies are inferred from the claim text.