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US 5,330,479 AGranted
Reciprocating bone punch
OwnerHenry B. Whitmoreinventor
Life of this patent
Estimating the term…
Abstract
A casing having an arcuate tool bit at its front end. The tool bit oscillates, having opposite points entering into the bone alternately. The tool bit is driven by a rocking lever, and the lever is driven by a hammer driven by a motor with a flywheel. The arrangement provides a percussion thrust against the lever by the hammer in each of opposite directions.
Claims9
A surgery bone chisel instrument comprising,
- a casing having an open front end,
- a tool bit having cutting elements lying in a circle with tips spaced apart and directed toward each other, and having an actuating element diametrically opposite the tips,
- the tool bit including a shaft mounted in the casing adjacent the open front end of the casing with its axis disposed transverse to the casing, and oscillatable on that axis, and operable in response to such oscillation for alternately extending the tips through the open front end of the casing, and
- means for oscillating the tool bit, including a driver in the casing at a rear end of the casing, a lever in the casing rockable on a transverse axis at a midpoint of the lever,
- the lever at the front end having operable connection with said actuating element, and at its rear end with the driver,
2 more elements
Dependencies are inferred from the claim text.