Accessory for a hand drill
OwnerCarl Zensesinventor
Life of this patent
Estimating the term…
Abstract
A tool has a shank extending axially in one direction from a material-removing formation and engageable in the chuck of a handle-held electric drill, and has a shaft extending axially in the opposite direction. A handle is rotatable on but axially fixed on this shaft and a guide ring can be secured at any position along it. This guide ring can therefore ride along a guide and determine the exact axial position of the material-removing formation relative to the workpiece edge of a guide securable to the workpiece.
Claims11
In combination with a hand-held electric drill having a chuck defining a chuck axis and adapted to rotate about said chuck axis;
- a tool having a tool axis, a material-removing formation, a shank extending axially to one side of said formation and receivable within said chuck with said axes aligned, and a shaft extending axially to the other side of said formation;
- a handle;
- means for securing said handle to said shaft for force transmission between said handle and said tool radially of said tool axis and for relative freedom of motion of said tool and said handle on rotation of said tool about said chuck axis;
- a first guide ring on said shaft between said handle and said formation and projecting radially from said shaft;
- means for securing said first guide ring on said shaft in any of a plurality of axially offset positions thereon;
- a guide strip on said workpiece extending therealong in a guide direction adjacent a region of said workpiece to be worked by said formation, said guide strip having a predetermined width;
- a second guide ring on said shaft between said handle and said formation and projecting radially from said shaft;
- and
- means for securing said second guide ring on said shaft in a position spaced axially from said first guide ring by a distance equal substantially to said predetermined width, whereby said shaft can rest on said guide strip with said guide rings flanking same so that said formation can work said region as said tool is displaced along said guide strip.
in combination with a hand-held electric drill having a chuck defining a chuck axis and adapted to rotate about said chuck axis:
- a tool having a tool axis, a material-removing formation, a shank extending axially to one side of said formation and receivable within said chuck with said axes aligned, and a shaft extending axially to the other side of said formation;
- a handle;
- means for securing said handle to said shaft for force transmission between said handle and said tool radially of said tool axis and for relative freedom of motion of said tool and said handle on rotation of said tool about said chuck axis;
- a guide ring on said shaft between said handle and said formation and projecting radially from said shaft;
- means for securing said guide ring on said shaft in any of a plurality of axially offset positions thereon;
- a journal surrounding said shaft between said ring and said formation;
- a rail securable adjacent a workpiece and defining a path;
- a guide on said journal displaceable on said rail along said path;
- an element in said guide rotatable about an element axis therein and formed with a hole parallel to and offset from said element axis and constituting said journal;
- and
- means for locking said element in any of a plurality of angularly offset positions in said guide.
Dependencies are inferred from the claim text.