Reversible clamping hub

• US 6,093,090 A
• Filed: 01/28/1998
• Issued: 07/25/2000
• Est. Priority Date: 01/28/1998
• Status: Expired due to Term

• Current Assignee: Mechadyne PLC, Stanley Works Limited (Stanley Black & Decker, Inc.)
• Original Assignee: Stanley Works Limited (Stanley Black & Decker, Inc.)
• Inventors: Tosto, Anthony C., Dohogne, Dennis A.
• Primary Examiner(s): Eley, Timothy V.
• Application Number:
  US09/014,788
• Time in Patent Office: 909 Days
• Field of Search: 83/651, 451/342, 451/343, 451/344, 451/352, 451/359, 408/239 R
• US Class Current: 451/342
• CPC Class Codes: B24B 23/02 with rotating grinding tools; Accessories therefor
• CPC Class Codes: B24B 45/00 Means for securing grinding wheels on rotary arbors suppression of vibrations in systems F16F15/00; testing static or dynamic balancing of machines G01M1/00

Abstract

A clamping hub for coupling a tool wheel to a high speed rotary power tool which can be made to operate in both the clockwise and the counter-clockwise directions which will not become accidentally disengaged during operation in either direction is described.

Claims

1. A reversible clamping hub for a reversible rotary power tool comprising:

a) a motor shaft having an opening in one end, the motor shaft having an external thread on the outside of the motor shaft, and an internal thread in the opening, the internal thread being threaded in a direction opposite to the external thread,

b) a hollow sleeve having an internal thread at a first end to engage the external thread of the motor shaft,

c) a rotary tool wheel with a center hole,

d) a wheel retainer with a flange on a distal end thereof, and

e) a screw having an external thread to engage the internal thread of the motor shaft,

wherein the internal thread of the sleeve engages the external thread of the motor shaft, the wheel retainer is inserted through the tool wheel, and the screw is inserted through the wheel retainer, the tool wheel, and the sleeve and the external thread of the screw engages the internal thread in the opening of the motor shaft.

2. The reversible clamping hub of claim 1 wherein an exterior wall of the wheel retainer has a non-round cross-sectional shape and wherein a distal portion of the interior wall of the sleeve has a corresponding non-round cross-sectional shape.

3. The reversible clamping hub of claim 2 wherein an exterior wall of the sleeve has a cross-sectional shape which is hexagonal.

4. The reversible clamping hub of claim 2 in which the tool wheel is an abrasive grinding wheel.

5. The reversible clamping hub of claim 2 in which the non-round shaped opening of the sleeve is a "D" shape.

6. The reversible clamping hub of claim 2 in which the wheel retainer flange is shaped to engage the non-round shaped opening of the sleeve.

7. The reversible clamping hub of claim 1 wherein an exterior wall of the sleeve has a cross-sectional shape which is hexagonal.

8. The reversible clamping hub of claim 1 in which the tool wheel is an abrasive grinding wheel.

9. A reversible clamping hub for a reversible rotary power tool comprising:

a) a motor shaft having an opening in one end, the motor shaft having an external thread on the outside of the motor shaft, and an internal thread in the opening, the internal thread being threaded in a direction opposite to the external thread,

b) a sleeve positioned on the motor shaft, the sleeve having an opening with an internal thread which engages the external thread of the motor shaft,

c) a rotary tool wheel positioned on the motor shaft,

d) a wheel retainer inserted in the tool wheel, and

e) a screw inserted through the wheel retainer, the tool wheel, and the sleeve, the screw having an external thread which engages the internal thread in the opening of the motor shaft.

10. The reversible clamping hub of claim 9 wherein an exterior wall of the wheel retainer has a non-round cross-sectional shape and wherein at least a portion of an interior wall of the sleeve has a corresponding non-round cross-sectional shape.

11. The reversible clamping hub of claim 10 wherein an exterior wall of the sleeve has a cross-sectional shape which is hexagonal.

12. The reversible clamping hub of claim 10 wherein the non-round shaped opening of the sleeve is a "D" shape.

13. The reversible clamping hub of claim 10 wherein the wheel retainer has a flange, the flange being shaped to engage the non-round shaped opening of the sleeve.

14. The reversible clamping hub of claim 9 wherein an exterior wall of the sleeve has a cross-sectional shape which is hexagonal.

15. The reversible clamping hub of claim 9 wherein the tool wheel is an abrasive grinding wheel.