Power tool with light unit
First Claim
1. A power tool comprising:
- a housing;
a motor contained in the housing and connectable to an electrical power supply;
a motor control circuit configured to control operation of the motor;
a light unit coupled to the housing and configured to illuminate a work area, the light unit connectable to the electrical power supply;
a light unit control circuit configured to control illumination of the light unit; and
a switch unit coupled to the housing and selectively operable by the user to control operation of the motor control circuit and the light unit control circuit;
wherein the motor control circuit is configured to initiate operation of the motor the switch unit is actuated to an ON state, to maintain operation of the motor when the switch unit is maintained in the ON state, and to cease operation of the motor when the switch unit is deactivated to an OFF state; and
wherein the light unit control circuit is configured to cause the light unit to begin illuminating when the switch unit is actuated to the ON state, to cause the light unit to remain illuminated for a first predetermined time period that starts upon actuation of the switch unit to the ON state, to cause the light unit to remain illuminated for a subsequent second predetermined time period when the switch unit remains in the ON state at the end of the first predetermined time period, and to cause the light unit to stop illuminating when the later of the first predetermined time period and the second predetermined time period ends.
1 Assignment
0 Petitions
Accused Products
Abstract
A power tool includes a housing coupled to an electrical power source, a motor contained in the housing, and a motor control circuit that controls output speed of the motor. A light nut is coupled to the housing to illuminate a work surface. A light unit control circuit controls illumination of the light, unit. A switch unit is coupled to the housing and selectively operable to control the operation of the motor control circuit and the light unit control circuit. The light unit control circuit includes a timer configured to cause the light unit to illuminate a first brightness level when the switch unit is actuated, and to remain illuminated at the first brightness level for a predetermined time period after the trigger is actuated. The predetermined time period restarts if the switch unit is not deactivated before the end of the predetermined time period.
30 Citations
15 Claims
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1. A power tool comprising:
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a housing; a motor contained in the housing and connectable to an electrical power supply; a motor control circuit configured to control operation of the motor; a light unit coupled to the housing and configured to illuminate a work area, the light unit connectable to the electrical power supply; a light unit control circuit configured to control illumination of the light unit; and a switch unit coupled to the housing and selectively operable by the user to control operation of the motor control circuit and the light unit control circuit; wherein the motor control circuit is configured to initiate operation of the motor the switch unit is actuated to an ON state, to maintain operation of the motor when the switch unit is maintained in the ON state, and to cease operation of the motor when the switch unit is deactivated to an OFF state; and wherein the light unit control circuit is configured to cause the light unit to begin illuminating when the switch unit is actuated to the ON state, to cause the light unit to remain illuminated for a first predetermined time period that starts upon actuation of the switch unit to the ON state, to cause the light unit to remain illuminated for a subsequent second predetermined time period when the switch unit remains in the ON state at the end of the first predetermined time period, and to cause the light unit to stop illuminating when the later of the first predetermined time period and the second predetermined time period ends. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A power tool comprising:
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a housing; a motor contained in the housing and connectable to an electrical power supply; a motor control circuit configured to control operation of the motor; a light unit coupled to the housing and configured to illuminate a work area, the light unit connectable to the electrical power supply; a light unit control circuit configured to control illumination of the light unit; and a switch unit coupled to the housing and selectively operable by the user to control operation of the motor control circuit and the light unit control circuit; wherein the light unit control circuit includes a timer configured to cause the light unit to illuminate upon the switch unit being actuated to an ON state to initiate operation of the motor, and configured to cause the light unit to remain illuminated at the first brightness level for a predetermined time period that starts upon actuation of the switch unit to the ON state, wherein the timer restarts the predetermined time period when the switch unit is not deactivated to an OFF state to stop operation of the motor upon the end of the predetermined time period, and wherein the light unit control circuit causes the light unit to stop illuminating when the switch unit is deactivated and the predetermined time period has expired, such that the timer causes the light unit to remain illuminated for any remaining time in the predetermined time period upon the switch unit being deactivated to the OFF state. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification