Patent ID: 8429929
Filing Date: 2013-04-30
Classification: E06B,F25D

Abstract:
1. A flexible door panel cold storage door system for selectively blocking and unblocking a door opening in a boundary wall between a cold space and a warm space comprising: a doorframe assembly, having a vertical left frame, a horizontal top frame, and a vertical right frame mounted to or in said wall to contiguously define together with a floor surface between said left frame and said right frame of said door opening; said left frame having a left frame core; said top frame having a top frame core; said right frame having a right frame core; each said frame core having a frame core front surface and a longitudinal frame core front surface centerline; a plurality of open electromagnet wells in said frame cores distributed along and proximate to said centerlines; a frame core ventilation channel formed in said frame core front surfaces, said ventilation channel having a first end near said left frame core's bottom end and said ventilation channel contiguously and serially communicating to and through each said well in each said frame core and said ventilation channel having a second end near said right frame core's bottom end; a plurality of electromagnets operably mounted one electromagnet in each said well and mounted substantially flush to adjacent said frame core front surface; a nonferrous doorframe outer jacket attached to and substantially covers said frames, said ventilation channel, and said electromagnets; each said electromagnet selectively energized by a D/C power supply electrically connected to said electromagnets; said power supply selectively controlled by a control box; two air ventilation ports through said outer jacket and said ventilation ports communicating with said ventilation channel and with one said ventilation port located proximate said first end and the other said ventilation port located proximate said second end such that air heated by the electromagnets exits one of said ventilation ports, and traverses the floor surface; a movable flexible door panel having a door panel jacket and having a door panel periphery and said door panel selectively disposable against said doorframe outer jacket to at least partially block said door opening when in a closed position, said door panel substantially unblocking said door opening when in an open position; said door panel jacket having an upper end and a lower end; two bottom sweep gasket sections removably attached by attachment means to said door panel jacket proximate said lower end along said door panel periphery that overlap two portions of said doorframe outer jacket when said door panel is in said closed position with one said bottom sweep gasket section located proximate said first end and the other said bottom sweep gasket section located proximate said second end; a plurality of intermediate gasket sections removably and contiguously attached by attachment means to said door panel jacket between and proximate to said sweep gasket sections and along a contiguous portion of said door panel periphery that overlaps a contiguous portion of said doorframe outer jacket when said door panel is in said closed position and said gasket sections operably configured to form an air seal with said doorframe outer jacket when said door panel is in said closed position; and each said gasket section having at least one ferrous gasket target located proximate said gasket section's surface spaced away from said door panel jacket and towards said doorframe outer jacket and each said ferrous gasket target aligned to cooperate and be magnetically attracted by and to one of said electromagnets when said door panel is in said closed position and said electromagnets are energized.