Closure assemblies for fire doors, fire doors including such closure assemblies and methods of locking fire doors
AssigneeWon-Door Corporation
InventorsW. Michael Coleman, Duane O. Hall, E. Carl Goodman, Michael D. George, D. George Field
Life of this patent
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Abstract
In one embodiment, a closure assembly for a fire door, including a first lead post having a longitudinal cavity located therein, an opening extending through a wall of the first lead post into the longitudinal cavity and a locking member may be positioned within the longitudinal cavity that is configured to obstruct the opening into the longitudinal cavity upon reaching a predetermined temperature, is disclosed. In additional embodiments, fire doors including such closure assemblies and methods of locking fire doors are disclosed.
Claims20
A closure assembly for a fire door comprising:
- a first lead post configured to extend along a substantial length of a leading end of a fire door, the first lead post comprising:
- a longitudinal cavity located within the first lead post, the longitudinal cavity extending parallel with the first lead post;
- an opening extending through a wall of the first lead post into the longitudinal cavity;
- and
- a locking member located completely within the longitudinal cavity, the locking member configured to obstruct the opening into the longitudinal cavity upon reaching a predetermined temperature.
A closure assembly for a fire door comprising:
- a first lead post, the first lead post comprising:
- a longitudinal cavity located within the first lead post;
- an opening extending through a wall of the first lead post into the longitudinal cavity;
- and
- a locking member positioned within the longitudinal cavity, the locking member configured to obstruct the opening into the longitudinal cavity upon reaching a predetermined temperature;
- a receiving member configured to mate with the first lead post to form a closure, the receiving member comprising an extending member sized and positioned to extend into the longitudinal cavity of the first lead post through the opening upon mating of the first lead post and the receiving member, and the extending member comprising a recessed portion;
- and
- wherein the portion of the locking member positioned above the opening is configured to interact with the recessed portion of the extending member upon falling and prevent the removal of the extending member of the receiving member from the longitudinal cavity of the first lead post.
A method of locking a fire door, the method comprising:
- inserting an enlarged end portion of an extending member through an opening and into a cavity of a lead post;
- and
- heating the lead post to a predetermined temperature to cause a locking member completely enclosed within the cavity to move from a first position to a second position overlapping a portion of the opening and interacting with the enlarged end portion of the extending member to prevent the extending member from being removed from the cavity of the lead post.
A fire door comprising:
- a folding door section;
- and
- a lead post extending along a substantial length of a leading end of the folding door section, the lead post comprising:
- a longitudinal cavity located within the lead post, the longitudinal cavity extending parallel with the first lead post;
- an opening into the longitudinal cavity;
- and
- a locking member located completely within the longitudinal cavity, the locking member configured to interact with an extending member positioned in the longitudinal cavity upon reaching a predetermined temperature.
Dependencies are inferred from the claim text.