Patents Assigned to DuraSystems
  • Fire-rated ventilation duct and improvements therein
    Patent number: 11333390
    Abstract: A fire-rated ventilation duct system and improvements therein.
    Type: Grant
    Filed: March 25, 2020
    Date of Patent: May 17, 2022
    Assignee: DURASYSTEMS BARRIERS INC.
    Inventor: William Christopher Duffy
  • Fire-rated modular duct assembly suitable for exhausting flammable or hazardous gases, vapours and other materials
    Patent number: 9976768
    Abstract: A fire-rated exhaust duct system comprising a modular configuration or structure. The fire-rated exhaust duct system comprises a plurality of exhaust duct sections. Each of the exhaust duct sections is configured to be joined or connected with other exhaust duct sections in the field or at an installation site, e.g. in building housing a kitchen facility or a laboratory facility to form longer sections or runs for exhaust duct system.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: May 22, 2018
    Assignee: DuraSystems
    Inventor: William Christopher Duffy
  • Fire resistant access panel for ducts and air handling equipment
    Patent number: 8276319
    Abstract: An access panel assembly for providing access to a duct through an opening in the duct. The access panel assembly comprises a sealing member, a cover member and fasteners. The sealing member fits around the opening in the duct and the cover member fits over the sealing member and coupled to the duct by the fasteners. The cover member may comprise a fire resistant panel and is formable to the shape of the duct thereby allowing the access panel assembly to be fitted to irregular shaped ducts or openings in the ducts. The access panel assembly allows easy and ready access to the interior of ducts or other air handling equipment to permit the inspection and cleansing of the interior surfaces and other interior components of any contaminants.
    Type: Grant
    Filed: May 7, 2007
    Date of Patent: October 2, 2012
    Assignee: Durasystems Barriers, Inc.
    Inventor: William Christopher Duffy
  • Fire-rated modular duct assembly suitable for exhausting flammable or hazardous gases, vapours and other materials
    Patent number: RE49087
    Abstract: A fire-rated exhaust duct system comprising a modular configuration or structure. The fire-rated exhaust duct system comprises a plurality of exhaust duct sections. Each of the exhaust duct sections is configured to be joined or connected with other exhaust duct sections in the field or at an installation site, e.g. in building housing a kitchen facility or a laboratory facility to form longer sections or runs for exhaust duct system.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: May 31, 2022
    Assignee: DURASYSTEMS BARRIERS INC.
    Inventor: William Christopher Duffy