Power tools
First Claim
1. A power tool, comprising:
- a tool,a motor drivingly coupled to the tool,means for generating an elevated torque coupled to the motor and the tool, wherein the generating means emits impact sounds when the elevated torque is generated, wherein the impact sounds fall within a narrow frequency range anda piezoelectric buzzer that detects the impact sounds within the narrow frequency range and for attenuating frequencies outside the narrow range, the piezoelectric buzzer having a peak frequency range that is approximately equal to the narrow frequency range of the impact sounds, wherein the piezoelectric buzzer comprises a piezoelectric material.
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Accused Products
Abstract
A detector is disclosed that detects impact sounds, e.g., a hammer striking an anvil or oil pulses from an oil unit. The detector may comprise a receiver that selectively converts sound within a narrow frequency range into electric signals. Preferably, the impact sounds fall within the narrow frequency range of the receiver. A processor may be utilized to control the motor in order to stop the rotation of the hammer when a pre-determined number of impact sounds has been detected by the detector. In addition, the operating conditions can be set by a number of methods, including dials, sound sensors, keypads and remote control devices. Further, means for performing maintenance condition status checks are taught.
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Citations
15 Claims
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1. A power tool, comprising:
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a tool, a motor drivingly coupled to the tool, means for generating an elevated torque coupled to the motor and the tool, wherein the generating means emits impact sounds when the elevated torque is generated, wherein the impact sounds fall within a narrow frequency range and a piezoelectric buzzer that detects the impact sounds within the narrow frequency range and for attenuating frequencies outside the narrow range, the piezoelectric buzzer having a peak frequency range that is approximately equal to the narrow frequency range of the impact sounds, wherein the piezoelectric buzzer comprises a piezoelectric material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus comprising;
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an anvil, a hammer adapted to strike the anvil in order to generate a relatively large torque and a piezoelectric buzzer proximally disposed to the hammer and anvil, wherein the piezoelectric buzzer selectively detects impact sounds generated within a narrow frequency range by the hammer striking the anvil, the piezoelectric buzzer having a peak frequency range that is approximately equal to the narrow frequency range of the impact sounds, wherein the piezoelectric buzzer comprises piezoelectric material. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification