A power screw driver
AssigneeAtlas Copco Industrial Technique AB
InventorsUlf Mikael ERIKSSON, Karl Göran JOHANSSON
Life of this patent
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Abstract
A power screwdriver includes a housing having a vacuum chamber arranged to communicate with a source of sub-atmospheric pressure. The power screwdriver includes a motor, a bit drive spindle, and a bit supporting sleeve connected to the bit drive spindle. The rear end part of the bit supporting sleeve is surrounded by the vacuum chamber. The bit supporting sleeve is journaled by a bearing between a forward end part and a rear end part of the bit supporting sleeve. The bit supporting sleeve includes at least one longitude vacuum passage extending from its rear end part to its forward end part.
Claims10
1-9. (canceled)
A power screwdriver comprising:
- a housing having a vacuum chamber arranged to communicate with a source of sub-atmospheric pressure;
- a motor;
- a bit drive spindle;
- a bit supporting sleeve connected to the bit drive spindle, wherein a rear end part of the bit supporting sleeve is surrounded by the vacuum chamber;
- and
- a bearing journaling the bit supporting sleeve between a forward end part and a rear end part of the bit supporting sleeve,
- wherein the bit supporting sleeve comprises at least one longitude vacuum passage extending from the rear end part to the forward end part of the bit supporting sleeve.
Dependencies are inferred from the claim text.