Spiral cutting tool with detachable handle

• US 5,813,805 A
• Filed: 08/29/1996
• Issued: 09/29/1998
• Est. Priority Date: 08/29/1996
• Status: Expired due to Term

• Current Assignee: Credo Technology Corporation (Robert Bosch GmbH)
• Original Assignee: Robert K. Kopras
• Inventors: Kopras, Robert K.
• Primary Examiner(s): Howell, Daniel W.
• Assistant Examiner(s): Bhargava, Adesh
• Application Number:
  US08/705,254
• Time in Patent Office: 761 Days
• Field of Search: 16/114 R, 81/177.4, 81/490, 409/181, 409/182, 408/241 R
• US Class Current: 408/241.00R
• CPC Class Codes: B25F 5/003 Stops for limiting depth in rotary hand tools for drilling tools: B23B49/003
• CPC Class Codes: B25F 5/02 Construction of casings, bodies or handles B25F5/006, B25F5/008 take precedence
• CPC Class Codes: B25F 5/029 with storage compartments B25F5/027 takes precedence; handles with provisions for storing tool elements B25C1/08
• CPC Class Codes: Y10T 408/96 Miscellaneous
• CPC Class Codes: Y10T 409/306552 Randomly manipulated

Abstract

A detachable handle is provided on hand-held power tools, such as spiral cutting tools, in which cuts are made by positioning the axis of the cutting tool motor housing perpendicular to a workpiece surface, and moving a cutting tool bit through the workpiece in a direction perpendicular to the axis of the bit to remove material from the workpiece. A gripping surface of the detachable handle is aligned substantially parallel with the axis of the cutting tool housing. The detachable handle allows a cutting tool to be grasped firmly and comfortably with two hands, with one hand grasping the detachable handle and the other hand grasping the housing of the cutting tool to improve cutting accuracy and reduce user fatigue. The cutting tool housing is preferably provided with lugs extending therefrom, whereby the detachable handle may be detachably attached to the cutting tool. Threaded knobs are passed through mounting holes in ends of the detachable handle and threaded into holes in the housing lugs to detachably secure the handle to the lugs. The detachable handle is preferably formed to include one or more storage compartments therein, accessible through apertures in the handle, for storage of additional cutting tool bits, cutting tool accessories, etc. A sliding door on the detachable handle may be provided to allow access to the storage compartments, and to close the compartments to secure items stored therein during operation of the cutting tool.

Claims

1. An improved hand held power tool of the type including a power tool housing enclosing means for rotating a shaft extending from an end of the power tool housing along an axis thereof and means for attaching a bit to the shaft, and wherein the power tool is used to remove material from a workpiece by positioning the axis of the power tool housing perpendicular to a surface of the workpiece and moving the power tool housing in a direction perpendicular to the axis of the housing and parallel to the surface of the workpiece to cause the rotating bit to be moved through the workpiece in a direction perpendicular to an axis of the bit to remove material from the workpiece, the improvement comprising:

(a) a handle having first and second handle ends and a gripping surface; and

(b) means for attaching and detaching the handle by hand at each of the first and second handle ends to the power tool housing such that the handle gripping surface is substantially parallel to the axis of the power tool housing.

2. The improved hand held power tool of claim 1 wherein the hand held power tool is a spiral cutting tool including means for attaching a spiral cutting tool bit to the shaft.

3. The improved hand held power tool of claim 1 wherein the means for attaching and detaching the handle to the power tool housing includes lugs extending from the power tool housing and means for attaching and detaching the handle ends to the lugs.

4. The improved hand held power tool of claim 3 wherein the means for attaching and detaching the handle ends to the lugs includes threaded holes through the lugs, mounting holes through the handle ends that are positioned thereon to be aligned with the threaded holes through the lugs, and threaded knobs adapted to be inserted through the mounting holes on the handle ends and threaded into the threaded holes through the lugs to attach the handle ends to the lugs.

5. The improved hand held power tool of claim 1 wherein the handle includes at least one storage compartment accessible through an aperture in the handle.

8. The improved hand held power tool of claim 1 wherein the handle is made of glass filled nylon.

6. An improved hand held power tool of the type including a power tool housing enclosing means for rotating a shaft extending from an end of the power tool housing along an axis thereof and means for attaching a bit to the shaft, and wherein the power tool is used to remove material from a workpiece by positioning the axis of the power tool housing perpendicular to a surface of the workpiece and moving the power tool housing in a direction perpendicular to the axis of the housing and parallel to the surface of the workpiece to cause the rotating bit to be moved through the workpiece in a direction perpendicular to an axis of the bit to remove material from the workpiece, the improvement comprising:

(a) a handle having handle ends and a gripping surface and at least one storage compartment accessible through an aperture in the handle wherein the aperture in the handle is covered by a sliding door attached to the handle; and

(b) means for detachably attaching the handle at the handle ends to the Power tool housing such that the handle gripping surface is substantially parallel to the axis of the power tool housing.

7. The improved hand held power tool of claim 6 wherein the handle includes a first storage compartment accessible through a first aperture in the handle, a second storage compartment accessible through a second aperture in the handle, and wherein the sliding door attached to the handle is capable of being slid into a first position wherein the first aperture is covered and the second aperture is open, a second position wherein both the first and second apertures are covered, and a third position wherein the first aperture is open and the second aperture is covered.

9. A spiral cutting tool, comprising:

(a) a spiral cutting tool housing enclosing means for rotating a shaft extending from an end of the spiral cutting tool housing along an axis thereof and having first and second handle lugs extending therefrom;

(b) means for attaching a spiral cutting tool bit to the shaft whereby the spiral cutting tool is used to cut a workpiece by positioning the axis of the spiral cutting tool housing perpendicular to a surface of the workpiece and moving the spiral cutting tool housing in a direction perpendicular to the axis of the housing and parallel to the surface of the workpiece to cause the rotating spiral cutting tool bit to be moved through the workpiece in a direction perpendicular to an axis of the spiral cutting tool bit to remove material from the workpiece;

(c) a handle having first and second handle ends and a gripping surface; and

(d) means for attaching and detaching the handle by hand at each of the handle ends to the handle lugs on the spiral cutting tool housing such that the handle gripping surface is substantially parallel to the axis of the spiral cutting tool housing.

10. The spiral cutting tool of claim 9 wherein the means for attaching and detaching the handle ends to the lugs includes threaded holes through the lugs, mounting holes on the handle ends that are positioned thereon to be aligned with the threaded holes through the lugs, and threaded knobs adapted to be inserted through the mounting holes on the handle ends and threaded into the threaded holes through the lugs to attach the handle ends to the lugs.

11. The spiral cutting tool of claim 9 wherein the handle includes at least one storage compartment accessible through an aperture in the handle.

12. The spiral cutting tool of claim 11 wherein the storage compartment is adapted to receive and hold a spiral cutting tool bit.

16. The spiral cutting tool of claim 9 wherein the handle is made of glass filled nylon.

13. A spiral cutting tool, comprising:

(a) a spiral cutting tool housing enclosing means for rotating a shaft extending from an end of the spiral cutting tool housing along an axis thereof and having handle lugs extending therefrom;

(b) means for attaching a spiral cutting tool bit to the shaft whereby the spiral cutting tool is used to cut a workpiece by positioning the axis of the spiral cutting tool housing perpendicular to a surface of the workpiece and moving the spiral cutting tool housing in a direction perpendicular to the axis of the housing and parallel to the surface of the workpiece to cause the rotating spiral cutting tool bit to be moved through the workpiece in a direction perpendicular to an axis of the spiral cutting tool bit to remove material from the workpiece;

(c) a handle having handle ends and a gripping surface and at least one storage compartment accessible through an aperture in the handle wherein the storage compartment is adapted to receive and snugly hold a wrench having a wrench head, and wherein a width of the handle adjacent to the aperture is smaller than a width of the wrench head so that the head of a wrench held in the storage compartment will extend from a side of the handle to allow a user to grasp the wrench head to remove the wrench from the storage compartment; and

(d) means for detachably attaching the handle at the handle ends to the handle lugs on the spiral cutting tool housing such that the handle gripping surface is substantially parallel to the axis of the spiral cutting tool housing.

14. A spiral cutting tool, comprising:

(a) a spiral cutting tool housing enclosing means for rotating a shaft extending from an end of the spiral cutting tool housing alone an axis thereof and having handle lugs extending therefrom;

(b) means for attaching a spiral cutting tool bit to the shaft whereby the spiral cutting tool is used to cut a workpiece by positioning the axis of the spiral cutting tool housing perpendicular to a surface of the workpiece and moving the spiral cutting tool housing in a direction perpendicular to the axis of the housing and parallel to the surface of the workpiece to cause the rotating spiral cutting tool bit to be moved through the workpiece in a direction perpendicular to an axis of the spiral cutting tool bit to remove material from the workpiece;

(c) a handle having handle ends and a gripping surface and at least one storage compartment accessible through an aperture in the handle wherein the aperture in the handle is covered by a sliding door attached to the handle; and

(d) means for detachably attaching the handle at the handle ends to the handle lugs on the spiral cutting tool housing such that the handle gripping surface is substantially parallel to the axis of the spiral cutting tool housing.

15. The spiral cutting tool of claim 14 wherein the handle includes a first storage compartment accessible through a first aperture in the handle, a second storage compartment accessible through a second aperture in the handle, and wherein the sliding door attached to the handle is capable of being slid into a first position wherein the first aperture is covered and the second aperture is open, a second position wherein both the first and second apertures are covered, and a third position wherein the first aperture is open and the second aperture is covered.

17. A detachable handle for a spiral cutting tool, comprising:

(a) a gripping surface;

(b) first and second handle ends connected to the gripping surface and including mounting structures adapted for attaching and detaching the handle by hand at each of the handle ends to a housing of the spiral cutting tool such that the handle gripping surface is substantially parallel to an axis of the spiral cutting tool housing; and

(c) at least one storage compartment within the handle and accessible through an aperture in the handle.

18. The detachable handle of claim 17 wherein the mounting structures include mounting holes in the handle ends adapted to be aligned with threaded holes through lugs extending from the housing of the spiral cutting tool and adapted to receive threaded knobs therethrough that are threaded into the threaded holes through the lugs to attach the handle ends to the lugs.

19. The detachable handle of claim 17 wherein the storage compartment is adapted to receive and hold a spiral cutting tool bit.

20. A detachable handle for a spiral cutting tool, comprising:

(a) a gripping surface;

(b) handle ends connected to the gripping surface and including mounting structures adapted for detachably attaching the handle at the handle ends to a housing of the spiral cutting tool such that the handle gripping surface is substantially parallel to an axis of the spiral cutting tool housing; and

(c) at least one storage compartment within the handle and accessible through an aperture in the handle wherein the storage compartment is adapted to receive and snugly hold a wrench having a wrench head, and wherein a width of the handle adjacent to the aperture is smaller than a width of the wrench head so that the head of a wrench held in the storage compartment will extend from a side of the handle to allow a user to grasp the wrench head to remove the wrench from the storage compartment.

21. A detachable handle for a spiral cutting tool, comprising:

(a) a gripping surface;

(b) handle ends connected to the gripping surface and including mounting structures adapted for detachably attaching the handle at the handle ends to a housing of the spiral cutting tool such that the handle gripping surface is substantially parallel to an axis of the spiral cutting tool housing; and

(c) at least one storage compartment within the handle and accessible through an aperture in the handle wherein the aperture in the handle is covered by a sliding door attached to the handle.

22. The detachable handle of claim 21 wherein the handle includes a first storage compartment accessible through a first aperture in the handle, a second storage compartment accessible through a second aperture in the handle, and wherein the sliding door attached to the handle is capable of being slid into a first position wherein the first aperture is covered and the second aperture is open, a second position wherein both the first and second apertures are covered, and a third position wherein the first aperture is open and the second aperture is covered.

23. The detachable handle of claim 27 wherein the handle is made of glass filled nylon.