US 11,873,679 B2
System and method for rectifying excessive clearances of door assemblies
Roger Paul Skold, Jr., Collierville, TN (US); and Daniel Ray Tompkins, Cordova, TN (US)
Assigned to NATIONAL GUARD PRODUCTS, INC., Memphis, TN (US)
Filed by National Guard Products, Inc., Memphis, TN (US)
Filed on Feb. 2, 2022, as Appl. No. 17/591,140.
Application 17/591,140 is a continuation of application No. 16/597,423, filed on Oct. 9, 2019, granted, now 11,261,653.
Claims priority of provisional application 62/878,944, filed on Jul. 26, 2019.
Claims priority of provisional application 62/850,848, filed on May 21, 2019.
Prior Publication US 2022/0154525 A1, May 19, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. E06B 5/16 (2006.01); E06B 7/232 (2006.01); E06B 7/23 (2006.01)
CPC E06B 7/232 (2013.01) [E06B 5/164 (2013.01); E06B 7/2316 (2013.01); E05Y 2900/134 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A system, comprising:
a first component installed on a first side of a fire door, wherein the first component comprises:
a vertical portion for mounting onto an outer surface of the first side of the fire door, and
a horizontal portion inserted into a first gap between a top edge of the fire door and a door frame above the fire door or a second gap between a bottom edge of the fire door and a floor surface;
a second component installed on a second side of the fire door; and
at least one intumescent strip seal fitted on the horizontal portion of the first component,
wherein the at least one intumescent strip seal expands when exposed to high heat of a fire to fill at least a portion of the first gap or the second gap without causing movement of the first component,
wherein, when the horizontal portion of the first component is inserted into the second gap, the at least one intumescent strip seal is fitted on a top side of the horizontal portion of the first component, such that the at least one intumescent strip seal expands upward when exposed to the high heat of the fire to fill space between the top side of the horizontal portion of the first component and the bottom edge of the fire door.