Patents by Inventor Thomas Siwek
Thomas 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: 8316747Abstract: A power tool in one embodiment is a table saw which includes a swing arm assembly movable along a swing path, an actuator configured to force the swing arm assembly away from a first swing arm position and toward a second swing arm position, and a riving knife positioned outwardly of the swing arm assembly when the swing arm assembly is in the first swing arm position, the riving knife including a channel with a first end portion and a second end portion, a first curved channel portion with a first center of curvature and located between the first end portion and the second end portion, and a second curved channel portion with a second center of curvature and located between the first end portion and the second end portion, wherein the first center of curvature is not coincident with the second center of curvature.Type: GrantFiled: May 6, 2010Date of Patent: November 27, 2012Assignee: Robert Bosch GmbHInventors: Ravinder Voruganti, Ralph Dammertz, Thomas Siwek, Srinath Srinivas, Daniel J. Williams, Stephen M. Oshgan
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Patent number: 8297159Abstract: A power tool in one embodiment is a table saw which includes a latch hold mechanism, a swing arm movable along a swing arm path between a first position adjacent the latch hold mechanism and a second position spaced apart from the latch hold mechanism, a latch movable between a first position whereat the swing arm is maintained at the first position and a second position whereat the swing arm is not maintained at the first position, an actuating device configured to transfer a force to the swing arm when the swing arm is maintained at the first position, and a control system configured to control the actuating device to transfer a force to the swing arm when the swing arm is maintained at the first position sufficient to move the latch from the first position to the second position.Type: GrantFiled: August 26, 2009Date of Patent: October 30, 2012Assignee: Robert Bosch GmbHInventors: Ravinder Voruganti, Ralph Dammertz, Thomas Siwek, Srinath Srinivas, Daniel J. Williams, Stephen M. Oshgan
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Publication number: 20110048199Abstract: A power tool in one embodiment is a table saw which includes a swing arm assembly movable along a swing path, an actuator configured to force the swing arm assembly away from a first swing arm position and toward a second swing arm position, and a riving knife positioned outwardly of the swing arm assembly when the swing arm assembly is in the first swing arm position, the riving knife including a channel with a first end portion and a second end portion, a first curved channel portion with a first center of curvature and located between the first end portion and the second end portion, and a second curved channel portion with a second center of curvature and located between the first end portion and the second end portion, wherein the first center of curvature is not coincident with the second center of curvature.Type: ApplicationFiled: May 6, 2010Publication date: March 3, 2011Applicants: ROBERT BOSCH TOOL CORPORATION, ROBERT BOSCH GMBHInventors: Ravinder Voruganti, Ralph Dammertz, Thomas Siwek, Srinath Srinivas, Daniel J. Williams, Stephen M. Oshgan
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Publication number: 20110048196Abstract: A power tool in one embodiment is a table saw which includes a latch hold mechanism, a swing arm movable along a swing arm path between a first position adjacent the latch hold mechanism and a second position spaced apart from the latch hold mechanism, a latch movable between a first position whereat the swing arm is maintained at the first position and a second position whereat the swing arm is not maintained at the first position, an actuating device configured to transfer a force to the swing arm when the swing arm is maintained at the first position, and a control system configured to control the actuating device to transfer a force to the swing arm when the swing arm is maintained at the first position sufficient to move the latch from the first position to the second position.Type: ApplicationFiled: August 26, 2009Publication date: March 3, 2011Applicants: Credo Technology Corporation, Robert Bosch GmbHInventors: Ravinder Voruganti, Ralph Dammertz, Thomas Siwek, Srinath Srinivas, Daniel J. Williams, Stephen M. Oshgan
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Publication number: 20080022826Abstract: 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: ApplicationFiled: August 8, 2007Publication date: January 31, 2008Inventors: Alan Weir, Gary Castaldo, Mark Talesky, Thomas Siwek
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Publication number: 20080022827Abstract: 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: ApplicationFiled: August 8, 2007Publication date: January 31, 2008Inventors: Alan Weir, Thomas Siwek, Peter Domeny, Mark Talesky
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Publication number: 20070277661Abstract: 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: ApplicationFiled: August 8, 2007Publication date: December 6, 2007Inventors: Peter Domeny, Mark Talesky, Daniel Williams, Thomas Siwek, Gary Castaldo, Alan Weir
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Publication number: 20050268767Abstract: 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: July 25, 2005Publication date: December 8, 2005Inventors: Wojciech Pierga, Thomas Siwek, Ahmad Shishegar