Conduit reamer tool element

• US 7,651,303 B2
• Filed: 03/06/2008
• Issued: 01/26/2010
• Est. Priority Date: 03/06/2007
• Status: Active Grant

• Current Assignee: Milwaukee Electric Tool Corporation (Techtronic Industries Company Limited)
• Original Assignee: Milwaukee Electric Tool Corporation (Techtronic Industries Company Limited)
• Inventors: Kirby, Michael W., Zick, Jonathan A.
• Primary Examiner(s): Howell; Daniel W
• Application Number:
  US12/043,524
• Publication Number:
  US 20080219790A1
• Time in Patent Office: 691 Days
• Field of Search: 408/211, 408223-224, 408/226, 408/238, 408/239.R, 408/240, 408/80, 408/82, 408/233, 408/713, 279/75, 715/7, 715/8, 716/5, 790/1
• US Class Current: 408/80
• CPC Class Codes: B23B 31/1071 Retention by balls balls acting as jaws B23B31/22
• CPC Class Codes: B23B 5/167 Tools for chamfering the ends of bars or tubes
• CPC Class Codes: B25B 23/00 Details of, or accessories for, spanners, wrenches, screwdrivers bolt tensioners B25B29/02
• CPC Class Codes: Y10T 408/558 Opening coaxial with Tool
• CPC Class Codes: Y10T 408/899 Having inversely angled cutting edge
• CPC Class Codes: Y10T 408/905 Having stepped cutting edges
• CPC Class Codes: Y10T 408/953 Clamping jaws

Abstract

A conduit reamer for a cutting tool includes a generally cylindrical body having a longitudinal axis and a blade coupled to the generally cylindrical body. The blade includes a first blade portion defining a first height of the conduit reamer with respect to the longitudinal axis and a second blade portion defining a second height of the conduit reamer with respect to the longitudinal axis, wherein the first height is different than the second height. The conduit reamer further includes a shank end having a shank configured to be received and driven by the cutting tool, a bit end opposite the shank end and having a cavity configured to receive a tool bit, and a locking mechanism positioned proximate the bit end and configured to secure the tool bit within the cavity.

Claims

1. A conduit reamer for a cutting tool, the conduit reamer comprising:

a body having a longitudinal axis;

a first blade coupled to the body and defining a first height of the conduit reamer with respect to the longitudinal axis;

a second blade coupled to the body and defining a second height of the conduit reamer with respect to the longitudinal axis, wherein the first height is different than the second height;

a shank end configured to be received and driven by the cutting tool;

a bit end opposite the shank end and having an axially-extending cavity configured to receive a tool bit;

a radially-extending aperture in the bit end in communication with the cavity;

a locking member at least partially received in the radially-extending aperture; and

a sleeve surrounding at least a portion of the bit end, the sleeve including a cylindrical interior surface and a recess in the cylindrical interior surface,

wherein the sleeve is movable between an unlocked position, in which at least a portion of the locking member is received in the recess, and a locked position, in which no portion of the locking member is received in the recess.

2. The conduit reamer of claim 1, wherein the body comprises a first cylindrical portion having a first diameter and a second cylindrical portion having a second diameter.

3. The conduit reamer of claim 2, wherein the first diameter is different than the second diameter.

4. The conduit reamer of claim 2, wherein the first blade is positioned adjacent the first cylindrical portion and the second blade is positioned adjacent the second cylindrical portion.

5. The conduit reamer of claim 1, wherein the tool bit is removable from the cavity when the sleeve is in the unlocked position, and wherein the tool bit is secured in the cavity when the sleeve is in the locked position.

6. The conduit reamer of claim 5, wherein the locking member is engageable with the tool bit to secure the tool bit in the cavity when the sleeve is in the locked position.

7. The conduit reamer of claim 1, wherein at least one of the first blade and the second blade is selectively removable from the body.

8. The conduit reamer of claim 7, wherein at least one of the first blade and the second blade is retained by a hex screw.

9. The conduit reamer of claim 1, wherein at least one of the first blade and the second blade is integrally formed with the body.

10. The conduit reamer of claim 2, wherein the body further comprises a third cylindrical portion having a third diameter, wherein the third diameter is different than both the first diameter and the second diameter.

11. The conduit reamer of claim 10, further comprising a third blade coupled to the body, wherein the third blade has a third height different than both the first height and the second height.

12. The conduit reamer of claim 10, wherein the blade further comprises a third blade positioned adjacent the third cylindrical portion.

13. The conduit reamer of claim 11, wherein the first blade, the second blade, and the third blade are integrally formed with the body.

14. The conduit reamer of claim 11, wherein the first blade, the second blade, and the third blade are integrally formed with each other.

15. The conduit reamer of claim 1, wherein the first blade and the second blade are integrally formed with the body.

16. The conduit reamer of claim 1, wherein the first blade and the second blade are integrally formed with each other.

17. The conduit reamer of claim 1, wherein the locking member is engaged with the cylindrical interior surface of the sleeve when the sleeve is in the locked position.

18. The conduit reamer of claim 1, further comprising a biasing member positioned between the sleeve and the body and operable to bias the sleeve toward the locked position.

19. The conduit reamer of claim 1, wherein a first portion of the locking member protrudes into the cavity when the sleeve is in the unlocked position, wherein a second portion of the locking member protrudes into the cavity when the sleeve is in the locked position, and wherein the second portion is larger than the first portion.

20. The conduit reamer of claim 1, wherein the locking member is configured as a ball bearing.