Router switching system

• US 6,065,912 A
• Filed: 11/16/1998
• Issued: 05/23/2000
• Est. Priority Date: 11/16/1998
• Status: Expired due to Term

• Current Assignee: Black & Decker Incorporated (Stanley Black & Decker, Inc.)
• Original Assignee: Porter-Cable Corporation (Stanley Black & Decker, Inc.)
• Inventors: Cooper, Randy G., McNeal, Waymon L. Jr., Bosten, Donald R., Stolzer, James T.
• Primary Examiner(s): Howell, Daniel W.
• Application Number:
  US09/192,898
• Time in Patent Office: 554 Days
• Field of Search: 144/136.95, 144/154.5, 200/43.17, 200/43.11, 200/43.13, 408/124, 408/710, 409/134, 409/182, 409/229, 409/204, 409/206, 409/210, 409/218
• US Class Current: 409/134
• CPC Class Codes: B27C 5/10 Portable hand-operated wood-milling machines; Routers
• CPC Class Codes: Y10S 408/71 Safety device
• CPC Class Codes: Y10T 409/30392 with means to protect operative or machine [e.g., guard, safety device, etc.]
• CPC Class Codes: Y10T 409/306608 End mill [e.g., router, etc.]

Abstract

Improvements made to a router include a switching system which is part of a router handle and which operates the router motor by connecting it to an external electrical power source. In a preferred embodiment, the present switching system comprises the use of a locking lever and trigger in combination to activate the motor, to hold the trigger in a locked-on position to maintain the connection of electrical power to the motor, and to lock the movement of the trigger from occurring before an operator attempts to engage the motor. The switching system may also be combined with a preferred router handle shape in order to make the long term operation of the router and its switching comfortable with extended use.

Claims

1. A router having a locking system used to engage and lockout the operation of a router motor, the router comprising:

the router motor;

a motor housing surrounding the router motor;

a first router handle having an outer periphery;

a trigger located on the first handle and being configured to activate the router motor, the trigger having an on position and an off position; and

a locking lever located within the first handle, the locking lever having an arm member protruding out of the first handle about a portion of an outer circumference of the first handle to permit the locking lever to be operated by an index finger of an operator, the locking lever also having a locked position, an unlocked position, and a locked-on position;

wherein;

the trigger is configured to move into and out of the first handle when operated by a user;

the locking lever is configured to move along a portion of the outer periphery of the first handle; and

the trigger and the locking lever are configured to operate together such that the trigger will not operate until the locking lever is moved from the locked position to the unlocked position.

2. The router according to claim 1, wherein the trigger is located on the first handle between the motor housing and the outer periphery of the first handle.

3. The router according to claim 2, wherein the router further comprises an electrical switch and a connection to an external electrical power source, the electrical switch is configured to close an electrical circuit in order to connect the router motor to the electrical power source;

and

the trigger is configured to be a thumb-activated lever coupled to the electrical switch which is connected in a circuit with the router motor and the external electrical power source.

4. The router according to claim 3 wherein the trigger becomes flush with the outside periphery of the first handle when fully depressed into the first router handle.

5. The router according to claim 4, wherein the locking lever is further configured to hold the trigger in the on position when the locking lever is in the locked-on position.

6. The router according to claim 5, wherein locking lever is further configured to release the trigger from the on position when the trigger is depressed while the locking lever in the locked-on position.

7. The router according to claim 6, wherein the outer periphery of the first handle is substantially perpendicular to the motion of the trigger switch into and out of the first handle.

8. The router according to claim 1, wherein the locking system further comprises:

a spring extension;

a locking lug; and

a lug axle member;

wherein;

the locking lever defines a slot through which the locking lug can move;

the locking lug slides along the slot when the trigger switch is depressed after the locking lever is rotated from the locked position in order to align the locking lug with the slot;

the locking lug rotates about the lug axle;

the locking lever is located within a path of motion of the locking lug when in the locked position to prevent the trigger from being depressed;

the locking lever is located outside of the path of motion of the locking lug when in the unlocked position as the locking lug is aligned with the slot in the locking lever in order to allow the locking lug to move on the lug axle when the switch is depressed;

the locking lever and locking lug are configured to engage the each other when the trigger is depressed to hold the trigger in the on position; and

the spring extension is configured to rotate the locking lug about the lug axle member to release the switch from the on position when the trigger is depressed once the locking lever is engaged by the locking lug.

9. The router according to claim 8, wherein the locking lug is configured to prevent the locking lug from engaging the locking lever to hold the trigger in the on position after the locking lug is rotated 180°

about the lug axle when assembled.

10. A router having a locking system for use with a plunge router having a router motor housing surrounding a router motor, the router comprising:

a first router handle having an outer periphery;

a thumb-activated trigger located on the first handle, the trigger being configured to be depressed to an on position to activate the router motor and the trigger being further configured to be released to an off position to deactivate the router motor; and

a locking lever located within the first handle, the locking lever having an arm member protruding out of the first handle about a portion of the outer handle periphery of the first handle to permit the locking lever to be operated by an index finger of a user, the locking lever also having a locked position, unlocked position and a locked-on position;

a spring extension;

a locking lug; and

a lug axle member;

wherein;

the locking lever defines approximately at its center a slot through which the locking lug can move;

the locking lug is configured to slide along the slot when the trigger switch is depressed;

the locking lug rotates about the lug axle;

the locking lever is located within a path of motion of the locking lug when in the locked position to prevent the switch from being depressed;

the locking lever is located outside the path of motion of the locking lug when in the unlocked position as the locking lug is aligned with the slot in the locking lever in order to allow the locking lug to move on the lug axle member when the switch is depressed;

the locking lever and locking lug engage each other when the trigger is depressed in order to hold the trigger in the on position; and

the spring extension rotates the locking lug about the lug axle to release the trigger from the on position when the trigger is depressed once the locking lever is engaged by the locking lug and held in the locked-on position.

11. The router locking system according to claim 10, wherein the locking lever is configured to hold the switch in the on position.

12. The router locking system according to claim 11, wherein locking lever is further configured to release the trigger from the on position when the trigger is depressed while in the on position.

13. The router locking system according to claim 12, wherein the trigger is located between the motor housing and the first handle.