Hand-held type electrically powered fastener tool with on-board controller

• US 20030131462A1
• Filed: 12/17/2002
• Published: 07/17/2003
• Est. Priority Date: 12/18/2001
• Status: Active Grant

• Current Assignee: Stanley Works Limited (Stanley Black & Decker, Inc.)
• Original Assignee: Stanley Works Limited (Stanley Black & Decker, Inc.)
• Inventors: Aranowski, Jeffrey S., Kimmel, William D., Khalaf, Zuher N., Demchak, Leonard V.
• Granted Patent: US 6,738,685 B2
• Time in Patent Office: Days
• US Class Current: 29/407.02
• CPC Class Codes: B25B 21/00 Portable power-driven screw or nut setting or loosening tools; details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00; for mounting or dismounting wheels B60B29/006; Attachments for drilling apparatus serving the same purpose machines B23P19/06
• CPC Class Codes: H02K 11/0141 Shields associated with casings, enclosures or brackets
• CPC Class Codes: H02K 11/33 Drive circuits, e.g. power electronics H02K11/38 takes precedence
• CPC Class Codes: H02K 5/02 Casings or enclosures characterised by the material thereof
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132
• CPC Class Codes: H02K 7/116 with gears
• CPC Class Codes: Y10T 29/49766 torquing threaded assemblage or determining torque herein

Abstract

An aspect of the invention provides a hand-held type fastener tool for performing a fastening job using electrical power supplied from an electrical power source. The tool comprises an electrically-powered motor, having an electroconductive outer housing adapted to electrically couple to the earth ground line of the electrical power source, a stator, and a rotor. The motor electrically couples to the live and neutral lines of the electrical power source. An on-board controller is adapted to monitor the fastening job and perform predetermined operations in accordance with the logic scheme based on the monitoring of the fastening job.

The tool further comprises a shield comprising:

(a) an electroconductive element encircling the stator and adapted to electrically couple to the neutral line of the power source,

(b) a first insulation layer encircling the stator between the stator and the electroconductive element, and

(c) a second insulation layer encircling the electroconductive element between the electroconductive element and the electroconductive housing.

Claims

1. A hand-held type electrically powered fastener tool for performing a fastening job wherein torque is applied to a fastener using electrical power supplied from an electrical power source having live, neutral, and earth ground lines, the tool comprising:

a housing constructed and arranged to be manually carried by a user;

an electrically-powered motor having an electroconductive outer housing adapted to electrically couple to the earth ground line of the electrical power source, a stator received in the outer housing, and a rotor received in the outer housing and rotatable relative to the stator, the motor being adapted to electrically couple to the live and neutral lines of the electrical power source and to convert electrical power from the electrical power source into rotation of the rotor;

a fastener engaging member carried on the housing, the fastener engaging member being operatively connected to the rotor of the motor for rotation therewith and being engageable with a fastener in torque transmitting relation to enable a fastening job to be performed by engaging the fastener engaging member with the fastener and supplying electrical power to the motor to affect rotation of both the rotor and the fastener engaging member to thereby apply torque to the fastener;

an on-board controller carried on the housing and operable in accordance with a logic scheme, the controller being adapted to monitor the fastening job and perform predetermined operations in accordance with the logic scheme based on the monitoring of the fastening job; and

a shield comprising;

(a) an electroconductive element encircling the stator and adapted to electrically couple to the neutral line of the electrical power source,

(b) a first insulation layer encircling the stator between the stator and the electroconductive element so as to insulate the electroconductive element from the stator, and

(c) a second insulation layer encircling the electroconductive element between the electroconductive element and the electroconductive outer housing so as to insulate the electroconductive outer housing from the electroconductive element.

2. A tool according to claim 1, wherein the electroconductive element is a metallic mesh element.

3. A tool according to claim 2, wherein the metallic mesh element is formed of copper.

4. A tool according to claim 1, wherein the controller further comprises an AC/DC rectifier for electrically coupling to the power source, the AC/DC rectifier having at least live and neutral terminals for electrically coupling to the live and neutral terminals of the power source, respectively,

wherein the electroconductive element is electrically coupled to the neutral terminal of the AC/DC rectifier.

5. A tool according to claim 4, wherein the controller is electrically coupled to the motor and wherein the predetermined operations of the controller includes controlling the motor in accordance with the logic scheme based on the monitoring of the fastening job.

6. A tool according to claim 1, wherein the controller is electrically coupled to the motor and wherein the predetermined operations of the controller includes controlling the motor in accordance with the logic scheme based on the monitoring of the fastening job.