Patents by Inventor Stephen F. Gass
Stephen F. Gass 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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Publication number: 20180304384Abstract: Elevation mechanisms for table saws and anti-backdrive mechanisms for use in elevation mechanisms for table saws are disclosed. The anti-backdrive mechanisms typically include three sub-assemblies: an input assembly, an output assembly, and a fixed assembly. The anti-backdrive mechanisms prevent a torque related to the output assembly from changing the blade elevation. For example, the weight of the blade and the structure supporting the blade is prevented from backdriving the elevation mechanism and allowing the blade to drop.Type: ApplicationFiled: March 5, 2018Publication date: October 25, 2018Applicant: SawStop Holding LLCInventors: Stephen F. Gass, James F. W. Wright, J. David Fulmer, Jeffrey D. Weston, Steven D. McDaniel, D. Tate Fanning, Paul H. Stasiewicz
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Patent number: 10071499Abstract: Machines with safety systems are disclosed. The machine may take the form of woodworking machines including table saws, band saws, miter saws, hand-held circular saws, pneumatic chop saws, radial-arm saws, jointers, planars, routers and shapers. The machines may include an operative structure configured to perform a task, where the operative structure includes a cutting tool adapted to move in at least one motion, and a safety system adapted to detect the occurrence of an unsafe condition between a person and the cutting tool and for mitigating the unsafe condition. The safety system may include a detection subsystem and a reaction subsystem. The machine may also include a bypass or override mode where in an injury mitigation system is disabled for certain cuts.Type: GrantFiled: August 7, 2017Date of Patent: September 11, 2018Assignee: SawStop Holding LLCInventor: Stephen F. Gass
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Patent number: 10052786Abstract: Table saws and table saws designed to implement safety systems that detect contact between a person and a dangerous portion of the saw are disclosed. Table saw components, mounting systems for table saws, and table saw attachments are also disclosed. One embodiment may include a first clamp surface, a second clamp surface spaced apart from the first clamp surface so that a base portion of a riving knife or splitter can be placed between the clamp surfaces with the opposing sides of the base portion generally parallel to the first and second clamp surfaces.Type: GrantFiled: August 12, 2013Date of Patent: August 21, 2018Assignee: SawStop Holding LLCInventors: Stephen F. Gass, J. David Fulmer, David A. Fanning
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Publication number: 20180215064Abstract: Table saws with safety systems are disclosed. The safety systems detect and react to dangerous conditions, such as contact between the blade and a person. The table saws may include a switch, a first light that illuminates to indicate the safety system is operable, and a second light that illuminates to indicate that the safety system is inoperable. The switch may not power the saw when switched on if the second light is illuminated.Type: ApplicationFiled: March 26, 2018Publication date: August 2, 2018Applicant: SawStop Holding LLCInventors: Stephen F. Gass, J. David Fulmer, David A. Fanning
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Publication number: 20180207735Abstract: Inserts for use in table saws are disclosed. One embodiment may include a mechanism to lock mechanically and affirmatively the insert in a blade opening in a table saw. The mechanism is designed so that a user can install and remove the insert without tools. The mechanism also can be designed so that the front of the insert pops up above the table when released from its locked position. The mechanism can be further designed so that the insert can be unlocked or released by a user pressing a button or tab.Type: ApplicationFiled: March 19, 2018Publication date: July 26, 2018Applicant: SawStop Holding LLCInventors: Stephen F. Gass, James F.W. Wright
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Publication number: 20180210419Abstract: A band saw including a frame, at least two, spaced apart, rotatable wheels supported by the frame, a blade looped around the wheels, where rotation of at least one wheel causes the blade to move around the wheels, a detection system adapted to detect a dangerous condition between a person and the blade, and a reaction system configured to engage and stop the blade within 10 milliseconds after detection of the dangerous condition is disclosed. The reaction system may be configured to cut and grip the blade.Type: ApplicationFiled: March 26, 2018Publication date: July 26, 2018Applicant: SawStop Holding LLCInventor: Stephen F. Gass
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Patent number: 9981326Abstract: Table saws and table saws designed to incorporate safety systems are disclosed. The table saws may include vertical slide elevation mechanisms positioned toward the rear of the saw and constructed so that an arbor block and blade can retract when a safety system detects an unsafe condition. Other table saw parts and components are also disclosed.Type: GrantFiled: August 18, 2009Date of Patent: May 29, 2018Assignee: SawStop Holding LLCInventors: Stephen F. Gass, J. David Fulmer, William L. Emery, Paul H. Stasiewicz
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Patent number: 9969014Abstract: Woodworking machines and safety methods for use with those machines are disclosed. The machines include a detection system adapted to detect one or more dangerous conditions and a reaction system associated with the detection system. The reaction system can include an explosive to trigger the system, and also can be configured to retract a cutting tool at least partially away from a cutting region upon detection of a dangerous condition by the detection system.Type: GrantFiled: November 21, 2016Date of Patent: May 15, 2018Assignee: SawStop Holding LLCInventor: Stephen F. Gass
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Publication number: 20180104844Abstract: Blade tilt mechanisms for table saws are disclosed. The disclosed tilt mechanisms provide easy and intuitive operation. They also provide auto-locking so that a user simply releases a component to lock the blade at a specific angle. The tilt mechanisms also provide defined incremental steps for the tilt of the blade and the steps are typically spaced at 1-degree intervals.Type: ApplicationFiled: December 18, 2017Publication date: April 19, 2018Applicant: SawStop Holding LLCInventors: Stephen F. Gass, J. David Fulmer, James F.W. Wright
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Patent number: 9927796Abstract: A band saw including a frame, at least two, spaced apart, rotatable wheels supported by the frame, a blade looped around the wheels, where rotation of at least one wheel causes the blade to move around the wheels, a detection system adapted to detect a dangerous condition between a person and the blade, and a reaction system configured to engage and stop the blade within 10 milliseconds after detection of the dangerous condition is disclosed. The reaction system may be configured to cut and grip the blade.Type: GrantFiled: May 15, 2002Date of Patent: March 27, 2018Assignee: SawStop Holding LLCInventor: Stephen F. Gass
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Patent number: 9925683Abstract: Table saws with safety systems are disclosed. The safety systems detect and react to dangerous conditions, such as contact between the blade and a person. The table saws may include a switch, a first light that illuminates to indicate the safety system is operable, and a second light that illuminates to indicate that the safety system is inoperable. The switch may not power the saw when switched on if the second light is illuminated.Type: GrantFiled: September 23, 2015Date of Patent: March 27, 2018Assignee: SawStop Holding LLCInventors: Stephen F. Gass, J. David Fulmer, David A. Fanning
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Patent number: 9919369Abstract: Inserts for use in table saws are disclosed. One embodiment may include a mechanism to lock mechanically and affirmatively the insert in a blade opening in a table saw. The mechanism is designed so that a user can install and remove the insert without tools. The mechanism also can be designed so that the front of the insert pops up above the table when released from its locked position. The mechanism can be further designed so that the insert can be unlocked or released by a user pressing a button or tab.Type: GrantFiled: October 17, 2014Date of Patent: March 20, 2018Assignee: SawStop Holding LLCInventors: Stephen F. Gass, James F.W. Wright
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Patent number: 9908189Abstract: Elevation mechanisms for table saws and anti-backdrive mechanisms for use in elevation mechanisms for table saws are disclosed. The anti-backdrive mechanisms typically include three sub-assemblies: an input assembly, an output assembly, and a fixed assembly. The anti-backdrive mechanisms prevent a torque related to the output assembly from changing the blade elevation. For example, the weight of the blade and the structure supporting the blade is prevented from backdriving the elevation mechanism and allowing the blade to drop.Type: GrantFiled: January 30, 2017Date of Patent: March 6, 2018Assignee: SawStop Holding LLCInventors: Stephen F. Gass, James F. W. Wright, J. David Fulmer, Jeffrey D. Weston, Steven D. McDaniel, D. Tate Fanning, Paul H. Stasiewicz
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Patent number: 9878380Abstract: Throat plates for table saws and table saws are disclosed. In some embodiments, the throat plates and/or saws have at least one securement mechanism to secure and prevent inadvertent removal of the throat plate from the throat of the saw. In some embodiments, at least one of the securement mechanisms also provides a height adjustment mechanism and/or prevents vertical removal of the throat plate. In some embodiments, the throat plate has an accessory mounting port that provides a portal for accessories, including safety accessories, to extend through the plate from beneath the table of the saw. In some embodiments, the port extends from the plate's outer perimeter to divide the plate's rear end portion into a pair of spaced-apart members. In some embodiments, these members are independently secured to the table saw and retained apart from each other by one or more of the securement mechanisms.Type: GrantFiled: November 28, 2016Date of Patent: January 30, 2018Assignee: SawStop Holding LLCInventors: Stephen F. Gass, J. David Fulmer, David A. Fanning
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Publication number: 20170368710Abstract: 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: ApplicationFiled: September 11, 2017Publication date: December 28, 2017Applicant: SawStop Holding LLCInventors: Jeremy J. Burke, John P. Nenadic, J. David Fulmer, Stephen F. Gass
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Patent number: 9844891Abstract: Blade tilt mechanisms for table saws are disclosed. The disclosed tilt mechanisms provide easy and intuitive operation. They also provide auto-locking so that a user simply releases a component to lock the blade at a specific angle. The tilt mechanisms also provide defined incremental steps for the tilt of the blade and the steps are typically spaced at 1-degree intervals.Type: GrantFiled: July 19, 2013Date of Patent: December 19, 2017Assignee: SawStop Holding LLCInventors: Stephen F. Gass, J. David Fulmer, James F. W. Wright
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Publication number: 20170334087Abstract: Machines with safety systems are disclosed. The machine may take the form of woodworking machines including table saws, band saws, miter saws, hand-held circular saws, pneumatic chop saws, radial-arm saws, jointers, planars, routers and shapers. The machines may include an operative structure configured to perform a task, where the operative structure includes a cutting tool adapted to move in at least one motion, and a safety system adapted to detect the occurrence of an unsafe condition between a person and the cutting tool and for mitigating the unsafe condition. The safety system may include a detection subsystem and a reaction subsystem. The machine may also include a bypass or override mode where in an injury mitigation system is disabled for certain cuts.Type: ApplicationFiled: August 7, 2017Publication date: November 23, 2017Applicant: SawStop Holding LLCInventor: Stephen F. Gass
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Publication number: 20170312837Abstract: Table saws are disclosed. The table saws can include a blade, an arbor, an arbor block, an elevation carriage, and a latch that connects the arbor block and the elevation carriage. The arbor block can have a first position in which the latch connects the arbor block and the elevation carriage, and a second position in which the latch does not connect the arbor block and the elevation carriage. The arbor block can pivot from the first position to the second position upon the occurrence of a retraction force. The table saw can include an actuator to cause the occurrence of the retraction force, and detection electronics to detect contact between the blade and a person. Woodworking machines with detection and reaction systems are also disclosed. A reaction system can include an explosive that causes retraction of a cutting tool.Type: ApplicationFiled: April 17, 2017Publication date: November 2, 2017Applicant: SD3, LLCInventors: Stephen F. Gass, J. David Fulmer, David A. Fanning
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Patent number: 9757871Abstract: 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: October 17, 2014Date of Patent: September 12, 2017Assignee: SD3, LLCInventors: Jeremy J. Burke, John P. Nenadic, Stephen F. Gass, J. David Fulmer
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Patent number: 9724840Abstract: Machines with safety systems are disclosed. The machine may take the form of woodworking machines including table saws, band saws, miter saws, hand-held circular saws, pneumatic chop saws, radial-arm saws, jointers, planars, routers and shapers. The machines may include an operative structure configured to perform a task, where the operative structure includes a cutting tool adapted to move in at least one motion, and a safety system adapted to detect the occurrence of an unsafe condition between a person and the cutting tool and for mitigating the unsafe condition. The safety system may include a detection subsystem and a reaction subsystem.Type: GrantFiled: March 13, 2002Date of Patent: August 8, 2017Assignee: SD3, LLCInventor: Stephen F. Gass