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US 4,791,690 AGranted
Combination drill bit and socket drive assembly
OwnerHuang Kuang-Wuinventor
Life of this patent
Estimating the term…
Abstract
An assembly including a drill bit carried by a drill shaft and a detachable main socket for use in conjunction with an electric drill to permit combination power drilling and power socket driving functions. A crank provided with a secondary socket is engageable with the drill shaft to permit manual driving of the main socket.
Claims3
A combination drill and socket drive assembly comprising:
- (a) a drill shaft including a front drill bit for drilling a hole, a rear section for attachment to the chuck of an electric drill and an intermediate section;
- (b) a main socket for enclosing the drill bit, the main socket being provided with a seat at one end for engaging a nut and a D-shaped recess at the other end;
- (c) the intermediate section including means permitting detachable engagement of the main socket to the drill shaft, whereby the main socket is engaged to the drill shaft when the assembly is used for socket driving a nut and the main socket is completely removed from the drill shaft when the drill bit is used for drilling a hole;
- (d) a crank for permitting manual rotation of the drill shaft;
- and
- (e) the crank and rear section being provided with cooperating detachable engagement means.
3 more elements
Dependencies are inferred from the claim text.