Patents by Inventor John P. Nenadic
John P. Nenadic 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: 11940095Abstract: Power tools with conductive couplings used with active injury mitigation technology are disclosed. Conductive couplings are particularly relevant to table saws, hand-held circular saws, track saws, miter saws, and band saws with active injury mitigation technology. Conductive couplings provide a mechanism through which an electrical signal can be coupled or imparted to a blade, and then monitored for changes indicative of human contact with the blade. An exemplary conductive coupling includes a brush that establishes an electrical connection with a moving part of a power tool, and the brush maintains contact with the moving part of the power tool during at least 40 hours of cumulative time when the motor is spinning the arbor and blade without an interruption in the electrical connection sufficient to trigger the reaction system. A conductive coupling may be two-sided compliant. A conductive coupling may connect to a motor shaft to minimize electrical noise.Type: GrantFiled: August 20, 2021Date of Patent: March 26, 2024Assignee: SawStop Holding LLCInventors: Stephen F. Gass, John P. Nenadic, Louis R. Slamka
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Patent number: 11273504Abstract: Inserts for table saws are disclosed. The table inserts are equipped with a toolless locking mechanism that mechanically holds the insert in place and which allows for the installation and removal of the insert without the use of tools. The locking mechanism is easy to lock and unlock and yet robust enough to hold a zero-clearance insert in place.Type: GrantFiled: March 16, 2020Date of Patent: March 15, 2022Assignee: SawStop, Holding LLCInventors: John P. Nenadic, James F. W. Wright, Stephen F. Gass
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Publication number: 20220042648Abstract: Power tools with conductive couplings used with active injury mitigation technology are disclosed. Conductive couplings are particularly relevant to table saws, hand-held circular saws, track saws, miter saws, and band saws with active injury mitigation technology. Conductive couplings provide a mechanism through which an electrical signal can be coupled or imparted to a blade, and then monitored for changes indicative of human contact with the blade. An exemplary conductive coupling includes a brush that establishes an electrical connection with a moving part of a power tool, and the brush maintains contact with the moving part of the power tool during at least 40 hours of cumulative time when the motor is spinning the arbor and blade without an interruption in the electrical connection sufficient to trigger the reaction system. A conductive coupling may be two-sided compliant. A conductive coupling may connect to a motor shaft to minimize electrical noise.Type: ApplicationFiled: August 20, 2021Publication date: February 10, 2022Applicant: SawStop Holding LLCInventors: Stephen F. Gass, John P. Nenadic, Louis R. Slamka
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Patent number: 11104028Abstract: Fences for use in table saws are disclosed. One embodiment may include an actuator, handle or lever to lock and unlock the fence from the table, where the actuator, handle or lever is positioned substantially above the tabletop and substantially within the perimeter of the table (including any rail associated with the table). Another embodiment may include an actuator, handle or lever to lock and unlock the fence from the table, where the actuator, handle or lever is positioned along a top surface of the fence and configured so that the fence unclamps from the saw when the actuator, handle or lever is pressed. The fence may be configured to include a material support shelf that is selectably extendable and retractable.Type: GrantFiled: August 18, 2015Date of Patent: August 31, 2021Assignee: SawStop Holding LLCInventors: Jeremy J. Burke, John P. Nenadic, Stephen F. Gass, J. David Fulmer, Paul H. Stasiewicz
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Patent number: 11098849Abstract: Power tools with conductive couplings used with active injury mitigation technology are disclosed. Conductive couplings are particularly relevant to table saws, hand-held circular saws, track saws, miter saws, and band saws with active injury mitigation technology. Conductive couplings provide a mechanism through which an electrical signal can be coupled or imparted to a blade, and then monitored for changes indicative of human contact with the blade. An exemplary conductive coupling includes a brush that establishes an electrical connection with a moving part of a power tool, and the brush maintains contact with the moving part of the power tool during at least 40 hours of cumulative time when the motor is spinning the arbor and blade without an interruption in the electrical connection sufficient to trigger the reaction system. A conductive coupling may be two-sided compliant. A conductive coupling may connect to a motor shaft to minimize electrical noise.Type: GrantFiled: May 25, 2017Date of Patent: August 24, 2021Assignee: SawStop Holding LLCInventors: Stephen F. Gass, John P. Nenadic, Louis R. Slamka
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Publication number: 20210245390Abstract: Power saws and features for power saws are disclosed. Various features are particularly relevant to jobsite or benchtop table saws, such as a trunnion formed from a shaped tube, an elevation carriage, and an arbor block retention mechanism. Other features are particularly relevant to table saws, hand-held circular saws, track saws, miter saws, and band saws with active injury mitigation technology, such as an electrically isolating gear and an overmolded arbor/gear element.Type: ApplicationFiled: March 1, 2021Publication date: August 12, 2021Applicant: SawStop Holding LLCInventors: J. David Fulmer, Stephen F. Gass, John P. Nenadic
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Patent number: 10933554Abstract: Power saws and features for power saws are disclosed. Various features are particularly relevant to jobsite or benchtop table saws, such as a trunnion formed from a shaped tube, an elevation carriage, and an arbor block retention mechanism. Other features are particularly relevant to table saws, hand-held circular saws, track saws, miter saws, and band saws with active injury mitigation technology, such as an electrically isolating gear and an overmolded arbor/gear element.Type: GrantFiled: May 24, 2018Date of Patent: March 2, 2021Assignee: SawStop Holding LLCInventors: J. David Fulmer, Stephen F. Gass, John P. Nenadic
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Publication number: 20200376574Abstract: Table saws and features for table saws are disclosed. Some of the disclosed features are particularly relevant to portable table saws such as jobsite and bench-top table saws. Disclosed features include, but are not limited to, extendable rails, mechanisms to lock rails in position, drawers, compartments and components to store table saw accessories, switch boxes, dust collection systems, table saw housings, tables, and handles.Type: ApplicationFiled: June 22, 2020Publication date: December 3, 2020Applicant: SAWSTOP HOLDING LLCInventors: J. David Fulmer, John P. Nenadic, Paul H. Stasiewicz, Hollan A. Tsuda, Jeffrey D. Weston
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Patent number: 10737338Abstract: A dust collection system designed for a table saw is disclosed. The dust collection system includes a dust shroud and dust shield to channel dust generated by a blade as it cuts wood or other material. The dust shroud includes fins and walls to “peel” dust and air off a spinning blade and direct the dust and air downward. The dust shroud encloses the lower front portion of a blade. An insert with a channel into which a dust shield can extend is disclosed.Type: GrantFiled: December 4, 2013Date of Patent: August 11, 2020Assignee: SawStop Holding LLCInventors: Paul H. Stasiewicz, John P. Nenadic
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Patent number: 10710269Abstract: Blade guards for power tools such as table saws are disclosed. The blade guard may include a shroud that pivots up and down to allow a workpiece to move past the guard, a dust collection channel, and a pivot joint which maintains the dust collection channel in an operable condition as the shroud pivots up or down. The guard may also include a wood stop and anti-kickback pawls. The blade guard may be part of a dust collection system and may be connected to a vacuum system by a conduit such as a flexible hose.Type: GrantFiled: March 6, 2017Date of Patent: July 14, 2020Assignee: SawStop Holding LLCInventors: Hollan A. Tsuda, John P. Nenadic, Paul H. Stasiewicz
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Publication number: 20200215629Abstract: Inserts for table saws are disclosed. The table inserts are equipped with a toolless locking mechanism that mechanically holds the insert in place and which allows for the installation and removal of the insert without the use of tools. The locking mechanism is easy to lock and unlock and yet robust enough to hold a zero-clearance insert in place.Type: ApplicationFiled: March 16, 2020Publication date: July 9, 2020Applicant: SawStop Holding LLCInventors: John P. Nenadic, James F.W. Wright, Stephen F. Gass
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Patent number: 10688572Abstract: Table saws and features for table saws are disclosed. Some of the disclosed features are particularly relevant to portable table saws such as jobsite and bench-top table saws. Disclosed features include, but are not limited to, extendable rails, mechanisms to lock rails in position, drawers, compartments and components to store table saw accessories, switch boxes, dust collection systems, table saw housings, tables, and handles.Type: GrantFiled: September 25, 2018Date of Patent: June 23, 2020Assignee: SawStop Holding LLCInventors: J. David Fulmer, John P. Nenadic, Paul H. Stasiewicz, Hollan A. Tsuda, Jeffrey D. Weston
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Patent number: 10589366Abstract: Inserts for table saws are disclosed. The table inserts are equipped with a toolless locking mechanism that mechanically holds the insert in place and which allows for the installation and removal of the insert without the use of tools. The locking mechanism is easy to lock and unlock and yet robust enough to hold a zero-clearance insert in place.Type: GrantFiled: February 11, 2011Date of Patent: March 17, 2020Assignee: SawStop Holding LLCInventors: John P. Nenadic, James F. W. Wright, Stephen F. Gass
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Publication number: 20190293235Abstract: Power tools with conductive couplings used with active injury mitigation technology are disclosed. Conductive couplings are particularly relevant to table saws, hand-held circular saws, track saws, miter saws, and band saws with active injury mitigation technology. Conductive couplings provide a mechanism through which an electrical signal can be coupled or imparted to a blade, and then monitored for changes indicative of human contact with the blade. An exemplary conductive coupling includes a brush that establishes an electrical connection with a moving part of a power tool, and the brush maintains contact with the moving part of the power tool during at least 40 hours of cumulative time when the motor is spinning the arbor and blade without an interruption in the electrical connection sufficient to trigger the reaction system. A conductive coupling may be two-sided compliant. A conductive coupling may connect to a motor shaft to minimize electrical noise.Type: ApplicationFiled: May 25, 2017Publication date: September 26, 2019Applicant: SawStop Holding LLCInventors: Stephen F Gass, John P. Nenadic, Louis R. Slamka
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Patent number: 10384281Abstract: Fast-acting and low-inertia actuators useable in various applications where a high force must be applied very quickly are disclosed. Power tools with detection systems configured to detect a dangerous condition between a person and a cutting tool are disclosed. In power tools, for example in a woodworking machine, a fast-acting and low-inertial actuator as disclosed herein can be used to retract a blade upon detection of a dangerous condition by a detection system. The actuator includes a charge of pressurized fluid and one or more electromagnets to selectively retain or release the pressurized fluid.Type: GrantFiled: March 2, 2012Date of Patent: August 20, 2019Assignee: SawStop Holding LLCInventors: Stephen F. Gass, John P. Nenadic
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Patent number: 10315329Abstract: Fences for use in table saws are disclosed. One embodiment may include an actuator, handle or lever to lock and unlock the fence from the table, where the actuator, handle or lever is positioned substantially above the tabletop and substantially within the perimeter of the table (including any rail associated with the table). Another embodiment may include an actuator, handle or lever to lock and unlock the fence from the table, where the actuator, handle or lever is positioned along a top surface of the fence and configured so that the fence unclamps from the saw when the actuator, handle or lever is pressed.Type: GrantFiled: September 11, 2017Date of Patent: June 11, 2019Assignee: SawStop Holding LLCInventors: Jeremy J. Burke, John P. Nenadic, J. David Fulmer, Stephen F. Gass
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Publication number: 20190143427Abstract: A dust collection system designed for a table saw is disclosed. The dust collection system includes a dust shroud and dust shield to channel dust generated by a blade as it cuts wood or other material. The dust shroud includes fins and walls to “peel” dust and air off a spinning blade and direct the dust and air downward. The dust shroud encloses the lower front portion of a blade. An insert with a channel into which a dust shield can extend is disclosed.Type: ApplicationFiled: November 13, 2018Publication date: May 16, 2019Applicant: SawStop Holding LLCInventors: Paul H. Stasiewicz, John P. Nenadic
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Publication number: 20190091780Abstract: Table saws and features for table saws are disclosed. Some of the disclosed features are particularly relevant to portable table saws such as jobsite and bench-top table saws. Disclosed features include, but are not limited to, extendable rails, mechanisms to lock rails in position, drawers, compartments and components to store table saw accessories, switch boxes, dust collection systems, table saw housings, tables, and handles.Type: ApplicationFiled: September 25, 2018Publication date: March 28, 2019Applicant: SAWSTOP HOLDING LLCInventors: J. David Fulmer, John P. Nenadic, Paul H. Stasiewicz, Hollan A. Tsuda, Jeffrey D. Weston
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Publication number: 20180339422Abstract: Power saws and features for power saws are disclosed. Various features are particularly relevant to jobsite or benchtop table saws, such as a trunnion formed from a shaped tube, an elevation carriage, and an arbor block retention mechanism. Other features are particularly relevant to table saws, hand-held circular saws, track saws, miter saws, and band saws with active injury mitigation technology, such as an electrically isolating gear and an overmolded arbor/gear element.Type: ApplicationFiled: May 24, 2018Publication date: November 29, 2018Applicant: SawStop Holding LLCInventors: J. David Fulmer, Stephen F. Gass, John P. Nenadic
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Publication number: 20180304386Abstract: Fast-acting and low-inertia actuators useable in various applications where a high force must be applied very quickly are disclosed. Power tools with detection systems configured to detect a dangerous condition between a person and a cutting tool are disclosed. In power tools, for example in a woodworking machine, a fast-acting and low-inertial actuator as disclosed herein can be used to retract a blade upon detection of a dangerous condition by a detection system. The actuator includes a charge of pressurized fluid and one or more electromagnets to selectively retain or release the pressurized fluid.Type: ApplicationFiled: March 2, 2012Publication date: October 25, 2018Inventors: Stephen F. Gass, John P. Nenadic