Patents by Inventor Thomas R. Siwek
Thomas R. Siwek has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9702504Abstract: A detection system for detecting a dangerous condition for an operator using a power tool of the type which has an exposed blade relative to a work surface and a protection system for minimizing, if not eliminating the possibility of a user being injured by contacting the blade. In one preferred embodiment of the present invention, a proximity detection system is capable of detecting the presence of a user near the blade of a table saw and a protection system that can either retract the blade below the work surface of the table saw or terminate the drive torque to the blade which can result in rapid stopping of the saw blade by a work piece that is being cut.Type: GrantFiled: February 4, 2014Date of Patent: July 11, 2017Assignees: Robert Bosch Tool Corporation, Robert Bosch GmbHInventors: Wojciech T. Pierga, Thomas R. Siwek, Ahmad R. Shishegar
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Publication number: 20140150615Abstract: A detection system for detecting a dangerous condition for an operator using a power tool of the type which has an exposed blade relative to a work surface and a protection system for minimizing, if not eliminating the possibility of a user being injured by contacting the blade. In one preferred embodiment of the present invention, a proximity detection system is capable of detecting the presence of a user near the blade of a table saw and a protection system that can either retract the blade below the work surface of the table saw or terminate the drive torque to the blade which can result in rapid stopping of the saw blade by a work piece that is being cut.Type: ApplicationFiled: February 4, 2014Publication date: June 5, 2014Applicants: Robert Bosch GmbH, Robert Bosch Tool CorporationInventors: Wojciech T. Pierga, Thomas R. Siwek, Ahmad R. Shishegar
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Patent number: 8640583Abstract: A detection system for detecting a dangerous condition for an operator using a power tool of the type which has an exposed blade relative to a work surface and a protection system for minimizing, if not eliminating the possibility of a user being injured by contacting the blade. In one preferred embodiment of the present invention, a proximity detection system is capable of detecting the presence of a user near the blade of a table saw and a protection system that can either retract the blade below the work surface of the table saw or terminate the drive torque to the blade which can result in rapid stopping of the saw blade by a work piece that is being cut.Type: GrantFiled: July 25, 2005Date of Patent: February 4, 2014Assignee: Robert Bosch GmbHInventors: Wojciech T. Pierga, Thomas R. Siwek, Ahmad R. Shishegar
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Patent number: 8096220Abstract: Embodiments are directed to a modular saw guard system for a power saw having a top and a vertically adjustable blade, the system comprises a riving knife mechanism, a blade guard mechanism that is releasably mounted to the riving knife mechanism when the riving knife mechanism is at least in its extended position, the blade guard mechanism generally covering the blade and being adjustable to enable a work piece to be moved into cutting position by the blade and a kickback prevention mechanism that is releasably mounted to the riving knife mechanism when the riving knife mechanism is at least in its extended position, the kickback prevention mechanism being configured to engage a work piece as it is being cut by the blade and apply resistance to prevent the work piece from being expelled in the reverse direction.Type: GrantFiled: August 8, 2007Date of Patent: January 17, 2012Assignee: Robert Bosch GmbHInventors: Alan Weir, Gary Castaldo, Mark S. Talesky, Thomas R. Siwek
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Patent number: 7814818Abstract: A preferred embodiment of the present invention is directed to a modular saw guard system for a power saw of the type which has a table top, a rotatable circular saw blade that is vertically adjustable relative to the table top, wherein the system comprises a riving knife mechanism releasably mounted to the saw rearwardly of the blade, and being configured to be adjustable between retracted and extended positions relative to the blade, a blade guard mechanism that is releasably mounted to the riving knife mechanism and a kickback prevention mechanism that is releasably mounted to the riving knife mechanism when the riving knife mechanism is at least in its extended position, the kickback prevention mechanism being configured to engage a work piece as it is being cut by the blade and apply resistance to prevent the work piece from being expelled in the reverse direction.Type: GrantFiled: August 8, 2007Date of Patent: October 19, 2010Assignee: Robert Bosch GmbHInventors: Peter Domeny, Mark S. Talesky, Daniel J. Williams, Thomas R. Siwek, Gary Castaldo, Alan Weir
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Patent number: 7806032Abstract: A preferred embodiment of the present invention is directed to a modular saw guard system for a power saw of the type which has a table top, a rotatable circular saw blade that is vertically adjustable relative to the table top, the table top having an opening through which the saw blade can extend, the blade being configured to cut a work piece as the work piece is moved forwardly from a forward position to a rearward position, wherein the system comprises a riving knife mechanism releasably mounted to the saw rearwardly of the blade, and being configured to be adjustable between retracted and extended positions relative to the blade, a blade guard mechanism that is releasably mounted to the riving knife mechanism when the riving knife mechanism is at least in its extended position, the blade guard mechanism generally covering the blade and being adjustable to enable a work piece to be moved into cutting position by the blade and a kickback prevention mechanism that is releasably mounted to the riving knifeType: GrantFiled: August 8, 2007Date of Patent: October 5, 2010Assignee: Robert Bosch GmbHInventors: Alan Weir, Thomas R. Siwek, Peter Domeny, Mark S. Talesky
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Patent number: 6922153Abstract: A detection system for detecting a dangerous condition for an operator using a power tool of the type which has an exposed blade relative to a work surface and a protection system for minimizing, if not eliminating the possibility of a user being injured by contacting the blade. In one preferred embodiment of the present invention, a proximity detection system is capable of detecting the presence of a user near the blade of a table saw and a protection system that can either retract the blade below the work surface of the table saw or terminate the drive torque to the blade which can result in rapid stopping of the saw blade by a work piece that is being cut.Type: GrantFiled: May 13, 2003Date of Patent: July 26, 2005Assignee: Credo Technology CorporationInventors: Wojciech T. Pierga, Thomas R. Siwek, Ahmad R. Shishegar
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Publication number: 20040226800Abstract: A detection system for detecting a dangerous condition for an operator using a power tool of the type which has an exposed blade relative to a work surface and a protection system for minimizing, if not eliminating the possibility of a user being injured by contacting the blade. In one preferred embodiment of the present invention, a proximity detection system is capable of detecting the presence of a user near the blade of a table saw and a protection system that can either retract the blade below the work surface of the table saw or terminate the drive torque to the blade which can result in rapid stopping of the saw blade by a work piece that is being cut.Type: ApplicationFiled: May 13, 2003Publication date: November 18, 2004Applicant: Credo Technology Corporation.Inventors: Wojciech T. Pierga, Thomas R. Siwek, Ahmad R. Shishegar