PNEUMATIC HAND TOOL ROTATIONAL SPEED CONTROL METHOD AND PORTABLE APPARATUS
First Claim
1. A pneumatic hand tool rotation speed controller for monitoring and adjusting the rotational speed of a pneumatic driven hand tool in real time, said rotational speed controller receiving real time signals from a sensor secured to said hand tool and which monitors actual rotational speed of a driven shaft thereof, drive means to drive said driven shaft, said drive means being controlled by said rotational speed controller to increase or decrease the rotational speed of said driven shaft to substantially maintain a desired optimal rotational speed.
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Accused Products
Abstract
The rotational speed of a pneumatic hand tool is adjusted in real time to maintain a selected speed level irrespective of exterior parameters affecting the performance of the tool. The apparatus is comprised of a rotational speed sensor installed directly on the tool, a digital microprocessor using control algorithms, and a valve to adjust the flow of air to the tool.
910 Citations
18 Claims
- 1. A pneumatic hand tool rotation speed controller for monitoring and adjusting the rotational speed of a pneumatic driven hand tool in real time, said rotational speed controller receiving real time signals from a sensor secured to said hand tool and which monitors actual rotational speed of a driven shaft thereof, drive means to drive said driven shaft, said drive means being controlled by said rotational speed controller to increase or decrease the rotational speed of said driven shaft to substantially maintain a desired optimal rotational speed.
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12. A method of controlling the operating rotational speed of a driven shaft of a pneumatic hand tool, said pneumatic hand tool having a sensor to monitor the actual rotational speed of said driven shaft, said method comprising the steps of:
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i) inputting into a microcontroller a reference signal representative of a desired optimal rotational speed of said hand tool; ii) feeding real time signals to said microcontroller by said sensor representative of the actual rotational speed of said driven shaft when said hand tool is operational; and iii) comparing, in said microcontroller, said real time signals with said reference signal to generate a control signal to control the flow of air from a compressed air supply line connected to said hand tool to substantially maintain a desired optimal rotational speed of said driven shaft of said hand tool. - View Dependent Claims (13, 14, 15, 16)
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Specification