Hammer drill

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9908228
SERIAL NO

14055954

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A hammer drill includes a housing, a first ratchet fixed to the housing, a spindle rotatably supported by the housing about an axis, and a second ratchet coupled for co-rotation with the spindle. The second ratchet is engageable with the first ratchet in response to rearward displacement of the spindle to impart a hammering action on the spindle. The hammer drill further includes a thrust bearing having an arm extending away from the axis, and a selector ring having a post extending toward the arm. The selector ring is rotatable between a first position in which the post is engageable with the arm to limit the rearward displacement of the spindle and prevent engagement of the first and second ratchets, and a second position in which the post is misaligned with the arm to permit the rearward displacement of the spindle and engagement of the first and second ratchets.

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Patent Owner(s)

  • MILWAUKEE ELECTRIC TOOL CORPORATION

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Elger, William A West Bend, US 32 480

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