Movable handle for a power tool

• US 7,191,526 B2
• Filed: 12/09/2005
• Issued: 03/20/2007
• Est. Priority Date: 08/14/1998
• Status: Expired due to Term

• Current Assignee: Milwaukee Electric Tool Corporation (Techtronic Industries Company Limited)
• Original Assignee: Milwaukee Electric Tool Corporation (Techtronic Industries Company Limited)
• Inventors: Holly, Jeffrey Scott, James, Thomas Paul, Zeiler, Jeffrey Michael, Hessenberger, Jeffrey Charles, Brault, Richard Paul, Ahlswede, Scott George
• Primary Examiner(s): Eley; Timothy V.
• Application Number:
  US11/297,899
• Publication Number:
  US 20060107535A1
• Time in Patent Office: 466 Days
• Field of Search: 301/22, 303/19, 303/75, 303/82, 305/19, 30388-391, 83/13, 83/34, 83/56
• US Class Current: 30/391
• CPC Class Codes: B27B 5/29 Details; Component parts; Accessories
• CPC Class Codes: B27B 9/00 Portable power-driven circular saws for manual operation details or components, e.g. handles, casings, of portable power-driven tools not particularly related to the operation performed B25F5/00
• CPC Class Codes: B27B 9/02 Arrangements for adjusting the cutting depth or the amount of tilting
• CPC Class Codes: H01H 3/20 wherein an auxiliary movement thereof, or of an attachment thereto, is necessary before the main movement is possible or effective, e.g. for unlatching, for coupling
• CPC Class Codes: H01H 9/06 Casing of switch constituted by a handle serving a purpose other than the actuation of the switch, e.g. by the handle of a vacuum cleaner
• CPC Class Codes: Y10T 83/04 Processes
• CPC Class Codes: Y10T 83/05 With reorientation of tool between cuts
• CPC Class Codes: Y10T 83/0605 Cut advances across work surface
• CPC Class Codes: Y10T 83/626 Operation of member controlled by means responsive to position of element remote from member [e.g., interlock]
• CPC Class Codes: Y10T 83/869 Means to drive or to guide tool

Abstract

A movable handle and a power tool. The power tool comprises a housing, a motor supported by the housing and operable to drive a tool element about an axis, and a handle supported by the housing for rotation relative to the housing about the axis. Preferably, the power tool is a circular saw. The circular saw further comprises a switch assembly supported on the handle for movement with the handle and means for connecting the switch to the motor to accommodate movement of the switch relative to the motor. The switch assembly is electrically connectable to the motor and selectively connects the motor to a power source, and the connecting means includes a wiring arrangement. The circular saw further comprises a locking assembly for locking the handle in a position relative to the housing. Also, the circular saw preferably comprises means for preventing the switch assembly from connecting the motor to the power source when the locking assembly is in the unlocked condition and means for preventing the locking assembly from being operated from the locked condition to the unlocked condition when the switch assembly is in the operated condition.

Claims

1. A circular saw comprising:

a motor operable to rotatable drive a saw blade about an axis;

a housing including a guard portion covering an upper portion of the saw blade; and

a main handle supported for movement relative to the guard portion, the handle being graspable by an operator to provide for movement of the saw blade relative to a work piece;

wherein the housing includes a motor housing supporting the motor.

2. The saw of claim 1, and further comprising a switch supported on the handle and operable to connect the motor to a power source.

3. The saw of claim 2, and further comprising a second handle engageable by an operator to provide for movement of the saw relative to the work piece.

4. The saw of claim 1, wherein the handle is movable between a first position and a second position, and wherein the saw further comprises a locking assembly for locking the handle in a position.

5. The saw of claim 1, wherein the handle is supported for movement relative to the motor housing.

6. The saw of claim 1, wherein the handle is movable between a push handle position and a top handle position.

7. The saw of claim 1, and further comprising a shoe plate connected to the housing and operable to support the saw on a work piece, wherein the handle is supported for movement relative to the shoe plate at least when the shoe plate is in an operative condition relative to the housing.

8. The saw of claim 7, wherein the shoe plate is movable relative to the housing to a second operative condition.

9. The saw of claim 8, and further comprising a shoe plate locking assembly operable to lock the shoe plate in an operative condition relative to the housing and to selectively allow movement of the shoe plate relative to the housing, the shoe plate being in a non-operative condition during movement relative to the housing.

10. A circular saw comprising:

a motor operable to rotatable drive a saw blade about an axis;

a housing;

a shoe plate connected to the housing and operable to support the saw on a work piece; and

a main handle supported for movement relative to the shoe plate at least when the shoe plate is in an operative condition relative to the housing, the handle being graspable by an operator to provide for movement of the saw relative to the work piece;

wherein the housing includes a guard covering an upper portion of the blade, and wherein the handle is movable relative to the guard.

11. The saw of claim 10, wherein the housing includes a motor housing supporting the motor.

12. The saw of claim 11, wherein the handle is supported for movement relative to the motor housing.

13. The saw of claim 10, wherein the shoe plate is movable relative to the housing to a second operative condition.

14. The saw of claim 13, and further comprising a shoe plate locking assembly operable to lock the shoe plate in an operative condition relative to the housing and to selectively allow movement of the shoe plate relative to the housing, the shoe plate being in a non-operative condition during movement relative to the housing.

15. The saw of claim 10, wherein the handle is movable between a first position and a second position, and wherein the saw further comprises a handle locking assembly for locking the handle in a position.

16. The saw of claim 10, wherein the handle is movable between a push handle position and a top handle position.

17. The saw of claim 10, and further comprising a switch supported on the handle and operable to connect the motor to a power source.

18. The saw of claim 10, and further comprising a second handle engageable by an operator to provide for movement of the saw relative to the work piece.