Patents Assigned to NT Dor-O-Matic, Inc.
  • Automatic door control system
    Patent number: 6316892
    Abstract: An automatic door control system which uses microcontrollers to control four drive transistors and a drive motor connected in an H-bridge circuit. The microcontrollers use pulse width modulation to control the speed of the drive motor.
    Type: Grant
    Filed: May 28, 1999
    Date of Patent: November 13, 2001
    Assignee: NT Dor-O-Matic, Inc.
    Inventor: Gilbert Valencia
  • Automatic door operator
    Patent number: 6108975
    Abstract: An automatic door operator for swing doors which uses a worm gear transmission to connect the motor to a belt and pulley which in turn is connected to a spur gear and drive gear. The door arm of the swing door is connected to a double-ended shaft which is part of the drive gear. A rack and pinion gear and spring are used to provide the closing force to the door arm. The motor is mounted over the spring and the belt and pulleys are located alongside the motor which results in a compact non-handed design.
    Type: Grant
    Filed: May 28, 1999
    Date of Patent: August 29, 2000
    Assignee: NT Dor-O-Matic Inc.
    Inventor: Kevin L. Bailey
  • Floating pivot sliding and swinging panel construction for doors and the like
    Patent number: 5832980
    Abstract: A swinging slide panel construction has panels which can slide relative to one another to open half of an opening, such as a doorway, and then swing together in a break-away mode for full access to the opening. One panel, which is pivotally fixed in the opening, has a support thereon which engages with a track on the other panel to support the same when the two panels are overlapped and swung open. A floating pivot assembly further engages the panels along the bottoms thereof, with the pivot assembly being entirely carried by the panels.
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: November 10, 1998
    Assignee: NT Dor-O-Matic Inc.
    Inventor: John S. Cianciolo