Patents by Inventor David A. Evarts

David A. Evarts 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).

  • Patent number: 6082031
    Abstract: Internally illuminated emergency signs are typically placed in elevated locations which are awkward for electricians to reach, yet must be securely mounted. It is therefore difficult and time-consuming to make wiring connections after the mounting operation is completed. In order to facilitate both quick and easy wiring of the sign, and secure mounting thereof, an improved canopy features a projecting bracket which slips into a slot in a side or top of the sign housing, and engages over horizontally extending screws. Rapid, yet secure mounting of the sign is achieved by cantilevering the sign on the bracket, if side mounting is used, or by use of a locking pin, if top mounting is used. The locking pin keeps the screws from sliding laterally with respect to the bracket.
    Type: Grant
    Filed: July 29, 1998
    Date of Patent: July 4, 2000
    Assignee: Dual-Lite Inc.
    Inventors: Thomas K. Heaton, David A. Evarts
  • Patent number: 5823378
    Abstract: A breather box attaches to the exterior wall of an electrical enclosure. An upper breather opening in the box connects with a vent opening in the wall. A lower breather opening in the box is shielded by a wall spaced therefrom to prevent water entry. A labyrinth in the interior of the box forces ascending water through a series of sharp turns and through a series of constrictions which are followed by expansion chambers. The labyrinth terminates at a liquid exit adjacent the upper wall of the breather box, forcing water to substantially fill the breather box before it can enter the enclosure.
    Type: Grant
    Filed: March 27, 1997
    Date of Patent: October 20, 1998
    Assignee: GSEG LLC
    Inventors: David A. Evarts, Charles R. Ruskouski, John Cutone
  • Patent number: D402316
    Type: Grant
    Filed: October 31, 1996
    Date of Patent: December 8, 1998
    Assignee: GSEG LLC
    Inventors: David A. Evarts, Joseph S. Wegrzyn, John E. Studer, Jr.
  • Patent number: D406279
    Type: Grant
    Filed: July 3, 1997
    Date of Patent: March 2, 1999
    Assignee: General Signal Corporation
    Inventors: Joseph M. LaRosa, Richard Diachenko, David A. Evarts, Joseph S. Wegrzyn, John E. Studer, Jr.
  • Patent number: D406863
    Type: Grant
    Filed: October 31, 1996
    Date of Patent: March 16, 1999
    Assignee: GSEG LLC
    Inventors: David A. Evarts, Joseph S. Wegrzyn, John E. Studer, Jr.