Patents by Inventor Stephen Gass

Stephen 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: 20080092702
    Abstract: Woodworking machines are disclosed having cutting tools for cutting workpieces. The machines include a detection system adapted to detect one or more dangerous conditions between a person and the cutting tool. The machines also include a mechanism having a moveable component adapted to move upon detection of the dangerous condition by the detection system. Movement of the moveable component contributes to one or more of the following actions to mitigate or prevent injury to the person: deceleration of the cutting tool, retraction of the cutting tool, and placement of a barrier over at least a part of the cutting tool. An actuator is adapted to move the moveable component at a high acceleration when the dangerous condition is detected.
    Type: Application
    Filed: December 17, 2007
    Publication date: April 24, 2008
    Inventors: Stephen Gass, David D'Ascenzo
  • Publication number: 20080041204
    Abstract: Woodworking machines are disclosed having electrically conductive cutting tools adapted to cut workpieces. The machines include a contact detection system capacitively coupled to the cutting tool, and adapted to detect contact between a person and the cutting tool. The machines also include a reaction system configured to cause one or more predetermined actions to take place upon detection of contact between a person and the cutting tool by the contact detection system.
    Type: Application
    Filed: October 22, 2007
    Publication date: February 21, 2008
    Inventor: Stephen Gass
  • Publication number: 20080029184
    Abstract: A saw is disclosed having a detection system adapted to detect a dangerous condition between a person and a saw blade, and a brake adapted to stop the saw blade in response to detection of the dangerous condition. The saw further includes a brake positioning system that allows the brake to be positioned in at least two different operable positions to accommodate at least two different blade diameters. The saw may include a system to detect brake-to-blade spacing.
    Type: Application
    Filed: June 11, 2007
    Publication date: February 7, 2008
    Inventor: Stephen Gass
  • Publication number: 20070240786
    Abstract: A woodworking machine including a detection system adapted to detect a dangerous condition between a person and a working portion of the machine is disclosed. The machine includes a reaction system associated with the detection system to cause a predetermined action to take place relative to the working portion upon detection of the dangerous condition. A motion detection system is adapted to detect motion of the working portion and to disable the reaction system when the working portion is not moving. The motion detection system may include a sensor, such as a Hall effect sensor, an electromagnetic field sensor, an optical sensor, or an electrical sensor. The woodworking machine may take the form of a saw, the working portion may be a blade adapted to cut when spinning, and the dangerous condition may be a person contacting the blade.
    Type: Application
    Filed: June 4, 2007
    Publication date: October 18, 2007
    Inventors: Stephen Gass, Robert Chamberlain, J. Fulmer, Joel Jensen, Benjamin Schramm
  • Publication number: 20070199622
    Abstract: Woodworking machines including conductive cutters adapted to cut workpieces, and motors adapted to drive the cutters are disclosed. The machines also include a contact detection system adapted to detect contact between a person and the cutter, and to distinguish contact between the person and the cutter from contact between the workpiece and the cutter. The machines further include a reaction system adapted to cause a predetermined action to take place upon detection of contact between the person and the cutter by the contact detection system.
    Type: Application
    Filed: April 30, 2007
    Publication date: August 30, 2007
    Inventors: Stephen Gass, Robert Chamberlain, Benjamin Schramm, Joel Jensen, Jonathan Betts-LaCroix
  • Publication number: 20070186737
    Abstract: Brake pawls for use in safety systems for power equipment are disclosed. The brake pawls include an energy-absorbing region. The energy absorbing regions may include a deformable or collapsible region made from apertures in the brake pawl or from collapsible members or from materials of differing hardnesses, strengths, or structures.
    Type: Application
    Filed: April 17, 2007
    Publication date: August 16, 2007
    Inventors: Stephen Gass, David Fanning
  • Publication number: 20070175306
    Abstract: Elevation mechanisms for table saws are disclosed. Embodiments include mechanisms with an elevation carriage, a trunnion structure, and a shaft with a cantilevered portion. The shaft can be fixed to one of the elevation carriage and trunnion structure, and the other of the elevation carriage and trunnion structure slides on the cantilevered portion.
    Type: Application
    Filed: March 14, 2007
    Publication date: August 2, 2007
    Inventors: Stephen Gass, J. Fulmer, David Fanning
  • Publication number: 20070157784
    Abstract: Table saws with mounting brackets for accessories such as riving knives, splitters and splitter/blade guard assemblies are disclosed. The mounting brackets can include handles that overlap a blade, handles capable of extending above a work surface in at least one position, handles accessible through an opening in a table, cam surfaces configured to reduce the possibility of unintentional opening of a clamping structure, and shoulders, flanges and/or surfaces to help position and hold the riving knife, splitter or splitter/blade guard assembly in the mounting bracket.
    Type: Application
    Filed: February 23, 2007
    Publication date: July 12, 2007
    Inventors: Stephen Gass, J. Fulmer, David Fanning
  • Publication number: 20070151433
    Abstract: Table saws with elevation mechanisms are disclosed. One embodiment includes a table saw with a blade, an elevation carriage, a trunnion structure, and a shaft positioned beyond the perimeter of the blade. Another embodiment includes a second shaft interconnecting the elevation carriage and trunnion structure, where the second shaft is positioned beyond the perimeter of the blade.
    Type: Application
    Filed: March 14, 2007
    Publication date: July 5, 2007
    Inventors: Stephen Gass, J. Fulmer, David Fanning
  • Publication number: 20070131071
    Abstract: A machine is described having at least one dangerous portion. The machine also includes a safety system to detect dangerous proximity between a person and the dangerous portion and perform a predetermined action to limit or prevent injury to the person from the dangerous portion.
    Type: Application
    Filed: February 5, 2007
    Publication date: June 14, 2007
    Inventors: Stephen Gass, J. Fulmer
  • Publication number: 20070101842
    Abstract: Power equipment with various safety systems is disclosed. Table saws with safety systems and/or blade retraction are disclosed. Over-molded arbors are disclosed, including arbors with prepreg over-molding.
    Type: Application
    Filed: December 29, 2006
    Publication date: May 10, 2007
    Inventor: Stephen Gass
  • Publication number: 20070034394
    Abstract: An electrically powered hand tool is disclosed. The tool includes a motor, a power source, a work element and a controller. Various alternative features, embodiments and operative configurations are disclosed. The electrically powered hand tool may be a drill/driver configured to interrupt the rotation of the work element responsive to detection of a torque that exceeds a predetermined torque threshold.
    Type: Application
    Filed: October 16, 2006
    Publication date: February 15, 2007
    Inventors: Stephen Gass, David D'Ascenzo
  • Publication number: 20070028733
    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: Application
    Filed: October 2, 2006
    Publication date: February 8, 2007
    Inventor: Stephen Gass
  • Publication number: 20060272463
    Abstract: A woodworking machine including a detection system adapted to detect a dangerous condition between a person and a working portion of the machine is disclosed. The machine includes a reaction system associated with the detection system to cause a predetermined action to take place relative to the working portion upon detection of the dangerous condition. A motion detection system is adapted to detect motion of the working portion and to disable the reaction system when the working portion is not moving. The motion detection system may sense whether motion in a machine has stopped by monitoring the back emf produced on the motor leads as the motor coasts to a stop. The woodworking machine may take the form of a saw, the working portion may be a blade adapted to cut when spinning, and the dangerous condition may be a person contacting the blade.
    Type: Application
    Filed: August 18, 2006
    Publication date: December 7, 2006
    Inventor: Stephen Gass
  • Publication number: 20060254401
    Abstract: A machine is disclosed having a detection subsystem adapted to detect contact between a person and a specified portion of the machine, and to distinguish that contact from contact with other materials. The detection subsystem imparts an electrical signal to a specified portion of the machine, and distinguishes that contact based on a predetermined frequency response of the electrical signal. A reaction subsystem then causes a predetermined action to take place. The machine may be a power saw designed to minimize injury in the event a person accidentally contacts the blade.
    Type: Application
    Filed: July 17, 2006
    Publication date: November 16, 2006
    Inventors: Stephen Gass, J. Fulmer
  • Publication number: 20060247795
    Abstract: Improved methods to detect when a human body contacts a predetermined portion of a machine are disclosed. The methods distinguish contact with a person from contact with other materials. The methods are particularly applicable in woodworking equipment such as table saws to distinguish contact between a person and the blade of the saw from contact between the blade and wet or green wood.
    Type: Application
    Filed: April 15, 2005
    Publication date: November 2, 2006
    Inventors: Stephen Gass, Paul Lingane, Arjuna Karunaratne
  • Publication number: 20060230896
    Abstract: A miter saw is disclosed having a base, a blade supported by the base, a detection system adapted to detect a dangerous condition between a person and the blade, and a reaction system associated with the detection system to cause a predetermined action to take place upon detection of the dangerous condition. The blade is rotatable, and moves into a cutting zone to cut a workpiece. The predetermined action may be to stop the blade from rotating, to create an impulse against movement of the blade into the cutting zone, or to cause the blade to move away from the cutting zone.
    Type: Application
    Filed: June 2, 2006
    Publication date: October 19, 2006
    Inventor: Stephen Gass
  • Publication number: 20060225551
    Abstract: Safety systems for power equipment are disclosed. The safety systems include a detection system adapted to detect contact between a person and a working portion of a machine, where the detection system is adapted to capacitively impart an electric charge on the working portion and to detect when that charge drops; and a reaction system associated with the detection system to cause a predetermined action to take place relative to the working portion upon detection of contact between the person and the working portion by the detection system. Machines equipped with safety systems are also disclosed, such as saws, jointers, etc.
    Type: Application
    Filed: June 5, 2006
    Publication date: October 12, 2006
    Inventor: Stephen Gass
  • Publication number: 20060219076
    Abstract: Throat plates for table saws and table saws including the same are disclosed. In some embodiments, the throat plates and/or saws include at least one securement mechanism adapted 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 includes 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: Application
    Filed: March 31, 2006
    Publication date: October 5, 2006
    Inventors: Stephen Gass, J. Fulmer, David Fanning
  • Publication number: 20060180451
    Abstract: Switch boxes for power tools with safety systems are disclosed. The switch boxes are particularly useful for woodworking equipment such as table saws equipped with safety systems that detect and react to dangerous conditions. The switch boxes may include a power switch, a start/stop switch, a bypass switch and a visual indicator.
    Type: Application
    Filed: April 11, 2006
    Publication date: August 17, 2006
    Inventors: Stephen Gass, J. Fulmer, David Fanning