Drilling device and method for producing undercut holes
OwnerPaul Geuvers, Paul Gaudroninventors
Life of this patent
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Abstract
A drilling device for producing undercut holes. The drilling device includes a drilling tool having an axis of rotation and a cutting portion arranged such that the cutting portion drills a hole with a longitudinal axis that is radially offset with respect to said axis of rotation and a centering device operable to apply a lateral force to said drilling tool for moving said axis of rotation towards said longitudinal axis to cause said cutting portion to form an undercut in a said hole.
Claims35
A drilling device for producing undercut holes, said drilling device comprising:
- a drilling tool having an axis of rotation and a cutting portion arranged such that the cutting portion drills a hole having a longitudinal axis that is radially offset with respect to said axis of rotation;
- and
- a centering device operable to apply a lateral force to said drilling tool for moving said axis of rotation towards said longitudinal axis to cause said cutting portion to form an undercut in said hole.
A drilling device for producing undercut holes, said drilling device comprising:
- a drilling tool comprising a drill shaft that defines an axis of rotation of said drilling tool and a cutting portion carried at an end region of said drill shaft such that, in use, the cutting portion drills a hole having a longitudinal axis that is radially offset with respect to said axis of rotation;
- and
- a centering device carried by said drilling tool, said centering device comprising an elongate member mounted so as to be slidable alongside said drill shaft into said hole to press against said drill shaft and apply a lateral force to said drill shaft, such that the axis of rotation is moved substantially into line with said longitudinal axis to cause said cutting portion to form an undercut in said hole, and at least one member connected with said elongate member by which a user of the drilling device can move said elongate member alongside said drill shaft.
A method of producing an undercut hole, comprising:
- drilling a hole with a drilling tool that has a cutting portion arranged to produce a hole having a longitudinal axis that is radially offset with respect to an axis of rotation of said drilling tool;
- and
- applying a lateral force to said drilling tool to cause said axis of rotation to move towards said longitudinal axis.
A method of producing an undercut hole, comprising:
- drilling a hole with a drilling tool that comprises a drill shaft having an axis of rotation and a cutting head that is positioned such that said hole has a longitudinal axis that is radially offset with respect to said axis of rotation;
- maintaining rotation of said drilling tool with said cutting head at a predetermined location in said hole and sliding an elongate member into said hole alongside between said drill shaft and a wall defining said hole to apply a lateral force to said drill shaft and thereby move said drill shaft to bring said axis of rotation substantially into line with said longitudinal axis causing said cutting head to widen said hole at said predetermined location to form an undercut.
A drilling device for producing undercut holes, said drilling device comprising:
- a drilling tool comprising a drill shaft that defines an axis of rotation of said drilling tool and a cutter carried at an end region of said drill shaft such that, in use, it drills a hole having a longitudinal axis that is radially offset with respect to said axis of rotation;
- and
- a centering device operable to apply a lateral force to said drilling tool for moving said axis of rotation towards said longitudinal axis to cause said cutter to form an undercut in a said hole, said centering device including;
- a centering member that is movable from a non-operative position outside of said hole to an operative position inside said hole in which the member is positioned between said drill shaft and a wall defining said hole so as to provide said lateral force;
- an operating device connected with said centering member by which an operator can move said centering member from said non-operative position to said operative position;
- a depth stop device by which a drilling depth of said hole is set;
- and
- a control device for said operating device, said control device being configured to prevent movement of said operating device by which said centering member is moved from said non-operative position to said operative position until said drilling tool has drilled said hole to said drilling depth set by said depth stop device.
The device of clam 26, wherein said control device comprises a gate member defining a slot for receiving a portion of said operating device, said slot being configured to prevent movement of said portion that would move said centering member from said non-operative to said operative position until said drilling tool has drilled said hole to said drilling depth set by said depth stop device.
Dependencies are inferred from the claim text.