Insulated smoke doors for cooler/freezer applications
AssigneeAluma Shield Industries, Inc.
InventorFrank C. Druzynski
Life of this patent
Estimating the term…
Abstract
A heavily insulated emergency smoke hatch door is equipped with an operating mechanism which is located external to a cooler and/or freezer. This external location of the operating mechanism provides for the accommodation of heavier weight doors without effecting the venting area or access to the interior of the cooler and/or freezer. A latching mechanism keeps the door in the closed position and may be equipped with an automatic release device which will release the door upon sensing of a fire for heat within the cooler and/or freezer. Once the hatch door is released, the operating mechanism is operable to open the door for venting and access.
Claims14
A heavily insulated smoke hatch door for a cooler or freezer, said smoke hatch door comprising:
- a frame disposed within an opening in said cooler or freezer, said frame defining a chamber in communication with the interior of said cooler or freezer;
- a heavily insulated door plug having one end pivotally secured to said frame, said door plug moveable between an open position and a closed position;
- extension spring means for urging said door plug into said opening position, said extension spring means disposed outside of said chamber defined by said frame and outside of said cooler or freezer, said extension spring means coupled with said pivot end of said door plug and said frame;
- latching means for holding said door plug in said closed position against the urging of said extension spring means;
- and
- a gasket disposed between said door plug and said frame when said door plug is in said closed position, said gasket operable to seal said opening in said cooler or freezer.
A heavily insulated smoke hatch door for a cooler or freezer, said smoke hatch door comprising:
- a frame disposed within an opening in said cooler or freezer, said frame defining a chamber in communication with the interior of said cooler or freezer;
- a heavily insulated door plug having an end pivotally secured to said frame, said door plug moveable between an open position and a closed position;
- a gasket disposed between said door plug and said frame when said door plug is in said closed position, said gasket operable to seal said opening in said cooler or freezer;
- a pair of extension arms positioned outside of said chamber defined by said frame and outside of said cooler or freezer, each extension arm secured to a side of the pivot end of said door plug;
- a pair of extension springs position outside of said chamber defined by said frame and outside of said cooler or freezer, each extension spring attached at one end to a respective extension arm and at the opposite end to said frame, said extension springs urging said door plug from said closed position towards said open position;
- and
- latching means for holding said door plug in said closed position against the urging of said pair of extension springs.
Dependencies are inferred from the claim text.