Patent ID: 6499219
Filing Date: 2002-12-31
Classification: B25F,G01C

Abstract:
An electric hand drill system for insuring the drilling of holes at proper angles comprising, in combination:a hand held electric drill having a main body portion containing a motor with a downwardly extending handle and trigger and with a forwardly extending chuck for removably receiving a drill bit rotatable about a primary axis by the motor upon pressing the trigger, the main body portion also having a cylindrical recipient surface between the chuck and the main body portion with an axis coincident with the primary axis; a coupling ring in a generally cylindrical configuration with a radial slot formed with an interior bearing surface positionable in contact with the recipient surface and formed with a bore there through and spanning the axial slot, the bore having a six-sided inner recess for receiving the head of a bolt and an outer recess with six equally spaced axial projections; a handle in a cup-shaped configuration having a six-sided interior bore for receiving a nut and with an exterior generally cylindrical surface for being held by a user and a central hole with an axis coincident with the axis of the bore through the coupling ring; a first disk having a central bore coincident with the bore of the handle and the coupling ring with diametrically opposed pairs of fingers selectively received upon the projections of the coupling ring and with indicia upon exterior surface to indicate the angular orientation of the first disk with respect to the handle and coupling ring and drill; a second disk having an central bore coincident with the bore of the attachment member and the first disk and handle and an exterior surface; a spirit level on the second disk in a circular configuration with a hemispherical top and an air bubble therewith to indicate the angular orientation of the system during operation and use; and a coupling assembly including a bolt extending through the bores of the attachment member and the first disk and the second disk and the handle for removably coupling the handle and spirit level to the drill, the bolt having a first end with a hexagonal head positioned in the inboard end of the coupling ring and a second end with male threads extending into the handle, the coupling assembly also including a hexagonal nut with internal threads received on the threads of the bolt and with an external hexagonal exterior surface received within the handle for tightening the handle and attachment member to the drill at the recipient surface and for insuring the angular orientation of the drill and a bit with respect to a wood piece to be drilled.