Hand-held type electrically powered fastener tool with on-board controller
First Claim
1. A system comprising:
- an electrical power source having live, neutral, and earth ground lines, and 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 the electrical power source, the tool comprising;
a housing constructed and arranged to be manually carried by a user;
an electrically-powered motor having (a) an electroconductive outer housing electrically coupled to the earth ground line of the electrical power source, (b) a stator received in the outer housing, and (c) a rotor received in the outer housing and rotatable relative to the stator, the motor being electrically coupled to the live and neutral lines of the electrical power source and operable 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 the fastener in torque transmitting relation to enable the 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 extending axially between the stator and the electroconductive outer housing, the shield comprising;
(a) an electroconductive element encircling the stator and electrically coupled 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.
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Accused Products
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.
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Citations
12 Claims
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1. A system comprising:
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an electrical power source having live, neutral, and earth ground lines, and 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 the electrical power source, the tool comprising;
a housing constructed and arranged to be manually carried by a user;
an electrically-powered motor having (a) an electroconductive outer housing electrically coupled to the earth ground line of the electrical power source, (b) a stator received in the outer housing, and (c) a rotor received in the outer housing and rotatable relative to the stator, the motor being electrically coupled to the live and neutral lines of the electrical power source and operable 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 the fastener in torque transmitting relation to enable the 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 extending axially between the stator and the electroconductive outer housing, the shield comprising;
(a) an electroconductive element encircling the stator and electrically coupled 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. - View Dependent Claims (2, 3, 4, 5, 6)
wherein the electroconductive element is electrically coupled to the neutral terminal of the AC/DC rectifier. -
5. A system 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.
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6. A system 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.
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7. 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:
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a housing constructed and arranged to be manually carried by a user;
a set of terminals for electrically coupling to the electrical power source, including a live terminal for electrically coupling to the live line, a neutral terminal for electrically coupling to the neutral line, and an earth ground terminal for electrically coupling to the earth ground line;
an electrically-powered motor having (a) an electroconductive outer housing electrically coupled to the earth ground terminal so as to be electrically coupled to the earth ground line when the set of terminals is electrically coupled to the electrical power source, (b) a stator received in the outer housing, and (c) a rotor received in the outer housing and rotatable relative to the stator, the motor being electrically coupled to the live and neutral terminals so as to be electrically coupled to the live and neutral lines, respectively, when the set of terminals is electrically coupled to the electrical power source, the motor being operable to convert electrical power from the electrical power source into rotation of the rotor when the set of terminals is electrically coupled to the electrical power source;
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 the fastener in torque transmitting relation to enable the 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 extending axially between the stator and the electroconductive outer housing, the shield comprising;
(a) an electroconductive element encircling the stator and electrically coupled to the neutral terminal so as to be coupled to the neutral line when the set of terminals is electrically coupled to 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. - View Dependent Claims (8, 9, 10, 11, 12)
wherein the electroconductive element is electrically coupled to the neutral terminal of the AC/DC rectifier. -
11. A tool according to claim 10, 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.
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12. A tool according to claim 7, 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.
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Specification