# US 9,376,855 B2 · Prehung fire door unit with one or two swing door leaf or leaves > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,376,855 B2 - Document ID: US9376855B2 - Status: Granted - Kind: B2 - Application number: 13/703,194 - Filed: 2010-06-10 - Published: 2013-03-28 - Granted: 2016-06-28 - Earliest claimed: 2010-06-08 - Assignees: Baumert - Applicants: Bernard Baumert - Inventors: Bernard Baumert - Web page: https://patentgrep.com/patent/US9376855B2 ## CPC - E06B 5/16: Fireproof doors or similar closures; Adaptations of fixed constructions therefor - E06B 1/603: {adjustable} - E06B 5/162: {Fireproof doors having windows or other openings, e.g. for permitting ventilation or escape} - E06B 1/02: Base frames, i.e. template frames for openings in walls or the like, provided with means for securing a further rigidly-mounted frame; Special adaptations of frames to be fixed therein {(E06B1/003, E06B1/24 take precedence; fastening door or window frames per se E06B1/56)} - E06B 3/822: {with an internal foursided frame} - E06B 2003/7042: {with a fire retardant layer} - E06B 2003/7046: {with provisions for locks, hinges or other fittings} - E06B 2003/7074: {Metal frames} - E06B 2003/7094: {with ventilated innerspace} - E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00) ## Abstract A prehung fire door unit with one or two swing door leaf or leaves intended to be mounted in an opening made in a stonework construction, rising up substantially vertically in a building. The prehung door unit includes a fixed frame and at least one door leaf, the fixed frame being able to be fitted, at least in part, into a recess made in the opening. The prehung door unit made of an assembly of profiled elements fitted end to end and each made from an elongate flat element made of rigid material having temperature and fire resistance properties and that can be applied, either directly or indirectly, against at least one of the closed end faces of the recess so as to create, in the closed end of the recess, an additional finishing and/or supporting thickness for each door leaf. ## Claims ### Claim 1 A system, comprising: a bay extending substantially vertically, wherein the bay includes a recess defined by an opening and an L-shaped base, the L-shaped base defining first and second surfaces disposed in perpendicular orientation relative to one another; and a fire door assembly, including: at least one swiveling door leaf including a front surface defining a plane orientated perpendicularly relative to the first surface of the L-shaped base in a closed position of the at least one swiveling door leaf; and a fixed frame made of a plurality of profile members including two substantially vertical uprights and a horizontal upper cross-member assembled end-to-end between the two substantially vertical uprights, each of the plurality of profile members made of an elongate and flat element of sheet metal and including a single L-shaped longitudinal fold, the at least one swiveling door leaf mounted pivotably to the fixed frame about a vertical axis by at least two hinges and the fixed frame fully inserted into the recess of the bay, wherein the single L-shaped longitudinal fold of each of the plurality of profile members enables complementary fitting of each of the plurality of profile members with the L-shaped base of the bay upon full insertion of the fixed frame into the recess of the bay, such that each of the plurality of profile members is fully inserted within the recess of the bay, and includes a first fold portion applied against the first surface of the L-shaped base of the bay in parallel orientation relative thereto, and a second fold portion spaced-apart from the second surface of the L-shaped base of the bay in parallel orientation relative thereto, wherein a distal end of the first fold portion of each of the plurality of profile members is co-planar with the front surface of the at least one swiveling door leaf, and wherein the fire door assembly is configured to be mounted in the bay. ### Claim 2 (depends on 1) The system according to claim 1, further comprising screws for attaching the fixed frame to the bay within the recess of the bay, thereby enabling spacing between the fixed frame and the base of the recess of the bay, in order to adjust a maximum degree of play between the at least one swiveling door leaf and the fixed frame in the recess of the bay in the closed position of the at least one swiveling door leaf. ### Claim 3 (depends on 1) The system according to claim 1, wherein the at least one swiveling door leaf includes a peripheral reinforcing and stiffening frame capable of receiving a filling structure, wherein the peripheral reinforcing and stiffening frame is made of at least one profile member, each profile member of the peripheral reinforcing and stiffening frame consisting of a frame plate, each frame plate being capable of being held along an edge of one side of the at least one swiveling door leaf, substantially parallel to the plane of the at least one swiveling door leaf. ### Claim 4 (depends on 3) The system according to claim 3, wherein the filling structure includes at least one insulating panel made of a composite material, and wherein a plurality of insulating panels of the filling structure are either held together or separated from one another by a space creating an air space to reduce a shift in gradient temperature. ### Claim 5 (depends on 4) The system according to claim 4, wherein each profile member of the peripheral reinforcing and stiffening frame has a T-shaped cross-section, so as to form the frame plate including an internal supporting and stiffening flange extending perpendicularly relative to the frame plate, the internal supporting and stiffening flange capable of being inserted into the filling structure, between the plurality of insulating panels, thereby pressure-clamping the plurality of insulating panels to a corresponding surface of the internal supporting and stiffening flange of the corresponding T-shaped cross-section profile member of the peripheral reinforcing and stiffening frame. ### Claim 6 (depends on 1) The system according to claim 1, wherein at least one of the front and a rear surface of the at least one swiveling door leaf is covered with a facing for protecting against fire and increases in temperature. ### Claim 7 (depends on 6) The system according to claim 6, wherein the facing of each of the front and the rear surface of the at least one swiveling door leaf is folded at a peripheral edge thereof so as to form a return capable of covering a portion of a corresponding edge of the at least one swiveling door leaf, without being in contact with another return of another facing covering the other surface, in order to ensure rupture of a thermal bridge between the facings of the front and the rear surfaces, respectively. ### Claim 8 (depends on 7) The system according to claim 7, wherein seals are inserted on a front surface side and a rear surface side of the at least one swiveling door leaf between each frame plate of the peripheral reinforcing and stiffening frame and the corresponding edge of the at least one swiveling door leaf. ### Claim 9 (depends on 1) The system according to claim 1, wherein a gap forming a baffle in the recess of the bay between the at least one door leaf and the fixed frame, in the closed position of the at least one swiveling door leaf, on a rear surface side of the fire door assembly, is substantially parallel to a rear surface of the at least one swiveling door leaf, and wherein at least one fire barrier part is attached to the rear surface of the at least one swiveling door leaf, the at least one fire barrier part capable of being positioned, in the closed position of the at least one swiveling door leaf, at an exit of the baffle of the recess of the bay, the at least one fire barrier part enabling hot gases exiting from the baffle at the rear surface to be oriented in a direction substantially perpendicular thereto and beyond therefrom. ### Claim 10 (depends on 9) The system according to claim 9, wherein the at least one swiveling door leaf includes a panic bar system, the panic bar system including a bar attached at each end thereof to the rear surface of the at least one swiveling door leaf, by a main supporting part, and wherein two fire protection parts are each arranged between one of two main supporting parts and the rear surface of the at least one swiveling door leaf, a width of each fire protection part being greater than a width of each main supporting part, so as to create a fire barrier on the rear surface of the at least one swiveling door leaf, which, in the closed position of the at least one swiveling door leaf, is situated at the exit of the baffle of the recess of the bay, and which, enables the hot gases exiting the baffle, beyond the rear surface of the at least one swiveling door leaf, to be oriented substantially perpendicular to the rear surface to prevent the hot gases from coming into contact with or directly striking against the main supporting parts to thereby limit increases in temperature on the panic bar system. ### Claim 11 (depends on 9) The system according to claim 9, wherein each fire protection part includes a core made of a composite material that is at least partially covered by a facing. ### Claim 12 (depends on 1) The system according to claim 1, wherein the base of the recess of the bay includes a side oriented substantially perpendicular to the plane of the at least one swiveling door leaf in closed position, so as to create, at the base of the recess of the bay, at least one of a finishing or support allowance for the at least one swiveling door leaf. ### Claim 13 (depends on 1) The system according to claim 1, wherein the bay is made in a masonry structure. ### Claim 14 (depends on 6) The system according to claim 6, wherein the facing is a metal sheet. ### Claim 15 (depends on 9) The system according to claim 9, wherein the gap forming the baffle in the recess of the bay is L-shaped.