Back to results
US 4,620,539 AGranted
Pistol grip, bone drill
OwnerE. Trent Andrews, Robert E. Mooreinventors
Life of this patent
Estimating the term…
Abstract
A pistol grip, bone drill with a lever lock for convenient locking of the drill chuck for manipulation of the chuck jaws, particularly for facilitating advances of the drill bit, the bone drill having a contoured pistol grip handle with a hand crank for rotating an elongated drill barrel by a conventional bevel gear mechanism, the drill barrel having an end chuck with a connected revolver cylinder having engagement holes for receiving a locking pin displaced by the lever lock.
Claims10
A bone drill comprising:
- (a) a bitstock having a spindle and a drill chuck at the end of the spindle, said chuck having an outer chuck head and displaceable jaws housed in said chuck head for retaining a drill bit in said chuck, said bitstock having further a hand grip, and a hand crank with a geared connection to said spindle for rotating said spindle, and
- (b) a chuck lock mechanism having locking means engageable with said chuck for holding said chuck head to allow displacement of said jaws by use of said hand crank to rotate said spindle, said mechanism having an actuating means located on said bitstock proximate said hand grip for actuating said locking means with the user's hand grip hand without a substantial shift in the gripping position of either of the user's hands when actuating said mechanism and displacing said jaws from the gripping position of the hands used for rotating said spindle.
Dependencies are inferred from the claim text.