| Patent application number | Description | Published |
|---|
| 20090094775 | Vacuum Electronic Switch Detection System - A vacuum electronic switch detection system allows multiple user selectable vacuum modes to be chosen with only one micro-controller input available for performing the multiple selectable modes. The switch detection system provides multiple voltage ratio control signals indicative of multiple switch position possibilities. | 04-16-2009 |
| 20090094777 | Vacuum electronics isolation method - A vacuum electronics isolation system utilizes an isolation circuit for providing a low voltage for operating a controller and to provide low voltage control signals for operating the vacuum motor to isolate the high voltage power source from the user. | 04-16-2009 |
| 20090094778 | Vacuum Electronic Water Sense Circuit - A vacuum electronics system is provided including an electronic water sense circuit for sensing the water level and preventing the vacuum source from operating when the water level approaches the vacuum filter. | 04-16-2009 |
| 20090183336 | Outlet Box For Power Tool Sense - A vacuum electronic power tool sense system senses the operation of a power tool that is plugged into an auxiliary outlet box and the vacuum source is automatically operated to facilitate user clean-up of debris generated by use of the power tool. The auxiliary outlet box can be removably mounted to the vacuum housing. | 07-23-2009 |
| 20090265943 | Portable Band Saw - A portable band saw includes a serviceable/replaceable bumper system for allowing the band saw to be easily repaired if damaged from being dropped. An auxiliary handle is adjustably mounted to the band saw and is releasable from its position if subjected to a large force so as to avoid damage to the handle and tool housing. An adjustable guide shoe includes a toolless adjustment. The front and rear section of the band saw are disposed on opposite sides of a polymeric field case. Compression rods are used to isolate compression forces from the polymeric field case. An electric box assembly including a plastic component box is disposed between the field case and a front section of the band saw. A crash guard is mounted adjacent to the field case and includes a sight guide along an edge thereof and a rear blade guard formed integrally therewith. | 10-29-2009 |
| 20110058288 | PROTECTIVE REDUNDANT SUBSYSTEM FOR POWER TOOLS - A protective redundancy circuit is provided for a power tool having an electric motor. The protective redundant subsystem is comprised of: a motor switch coupled in series with the motor; a motor control module that controls the switching operation of the motor switch; and a protective control module that monitors switching operation of the motor switch and disables the power tool when the switching operation of the motor switch fails. In the context of an AC powered tool, the switching operation of the motor switch is correlated to and synchronized to the waveform of the AC input signal. During each cycle or half cycle, the motor control module introduces a delay period before closing the motor switch and the protective control module determines the operational status of the motor switch by measuring the voltage across the motor switch during the delay period. | 03-10-2011 |
