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).

  • Publication number: 20180345522
    Abstract: Blade guards for table saws are disclosed. The blade guards can be used in a configuration where the guard holds a work piece against a work surface. This may be thought of as blade guards with hold-down capability. The blade guards also include splitters and anti-kickback assemblies. The anti-kickback assemblies include anti-kickback pawls that can be in an operable configuration or a disabled configuration.
    Type: Application
    Filed: August 6, 2018
    Publication date: December 6, 2018
    Applicant: SawStop Holding LLC
    Inventors: Stephen F. Gass, James F.W. Wright
  • Publication number: 20180345527
    Abstract: 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: Application
    Filed: August 10, 2018
    Publication date: December 6, 2018
    Applicant: SawStop Holding LLC
    Inventors: Stephen F. Gass, J. David Fulmer, David A. Fanning
  • Publication number: 20180339422
    Abstract: 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: Application
    Filed: May 24, 2018
    Publication date: November 29, 2018
    Applicant: SawStop Holding LLC
    Inventors: J. David Fulmer, Stephen F. Gass, John P. Nenadic
  • Publication number: 20180333792
    Abstract: 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: Application
    Filed: May 25, 2018
    Publication date: November 22, 2018
    Applicant: SawStop Holding LLC
    Inventors: Stephen F. Gass, J. David Fulmer, William L. Emery, Paul H. Stasiewicz
  • Patent number: 10118308
    Abstract: Mounting systems to secure and index riving knives and spreaders in table saws are disclosed. One embodiment may include three mounts or screws attached to an elevation carriage. A clamp plate fits over the heads of the mounts and a handle pivots to move the clamp plate against flanges on the heads of the mounts to clamp a riving knife or spreader in place.
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: November 6, 2018
    Assignee: SawStop Holding LLC
    Inventors: Stephen F. Gass, J. David Fulmer, James F. W. Wright
  • Publication number: 20180304386
    Abstract: 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: Application
    Filed: March 2, 2012
    Publication date: October 25, 2018
    Inventors: Stephen F. Gass, John P. Nenadic
  • Publication number: 20180304384
    Abstract: 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: Application
    Filed: March 5, 2018
    Publication date: October 25, 2018
    Applicant: SawStop Holding LLC
    Inventors: Stephen F. Gass, James F. W. Wright, J. David Fulmer, Jeffrey D. Weston, Steven D. McDaniel, D. Tate Fanning, Paul H. Stasiewicz
  • Patent number: 10071499
    Abstract: 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: Grant
    Filed: August 7, 2017
    Date of Patent: September 11, 2018
    Assignee: SawStop Holding LLC
    Inventor: Stephen F. Gass
  • Patent number: 10052786
    Abstract: 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: Grant
    Filed: August 12, 2013
    Date of Patent: August 21, 2018
    Assignee: SawStop Holding LLC
    Inventors: Stephen F. Gass, J. David Fulmer, David A. Fanning
  • Publication number: 20180215064
    Abstract: 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: Application
    Filed: March 26, 2018
    Publication date: August 2, 2018
    Applicant: SawStop Holding LLC
    Inventors: Stephen F. Gass, J. David Fulmer, David A. Fanning
  • Publication number: 20180210419
    Abstract: 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: Application
    Filed: March 26, 2018
    Publication date: July 26, 2018
    Applicant: SawStop Holding LLC
    Inventor: Stephen F. Gass
  • Publication number: 20180207735
    Abstract: 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: Application
    Filed: March 19, 2018
    Publication date: July 26, 2018
    Applicant: SawStop Holding LLC
    Inventors: Stephen F. Gass, James F.W. Wright
  • Patent number: 9981326
    Abstract: 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: Grant
    Filed: August 18, 2009
    Date of Patent: May 29, 2018
    Assignee: SawStop Holding LLC
    Inventors: Stephen F. Gass, J. David Fulmer, William L. Emery, Paul H. Stasiewicz
  • Patent number: 9969014
    Abstract: 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: Grant
    Filed: November 21, 2016
    Date of Patent: May 15, 2018
    Assignee: SawStop Holding LLC
    Inventor: Stephen F. Gass
  • Publication number: 20180104844
    Abstract: 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: Application
    Filed: December 18, 2017
    Publication date: April 19, 2018
    Applicant: SawStop Holding LLC
    Inventors: Stephen F. Gass, J. David Fulmer, James F.W. Wright
  • Patent number: 9927796
    Abstract: 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: Grant
    Filed: May 15, 2002
    Date of Patent: March 27, 2018
    Assignee: SawStop Holding LLC
    Inventor: Stephen F. Gass
  • Patent number: 9925683
    Abstract: 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: Grant
    Filed: September 23, 2015
    Date of Patent: March 27, 2018
    Assignee: SawStop Holding LLC
    Inventors: Stephen F. Gass, J. David Fulmer, David A. Fanning
  • Patent number: 9919369
    Abstract: 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: Grant
    Filed: October 17, 2014
    Date of Patent: March 20, 2018
    Assignee: SawStop Holding LLC
    Inventors: Stephen F. Gass, James F.W. Wright
  • Patent number: 9908189
    Abstract: 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: Grant
    Filed: January 30, 2017
    Date of Patent: March 6, 2018
    Assignee: SawStop Holding LLC
    Inventors: Stephen F. Gass, James F. W. Wright, J. David Fulmer, Jeffrey D. Weston, Steven D. McDaniel, D. Tate Fanning, Paul H. Stasiewicz
  • Patent number: 9878380
    Abstract: 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: Grant
    Filed: November 28, 2016
    Date of Patent: January 30, 2018
    Assignee: SawStop Holding LLC
    Inventors: Stephen F. Gass, J. David Fulmer, David A. Fanning