Latecoere has been granted a patent for an aircraft pressurized cabin door design. The door structure includes circumferential and longitudinal beams, with the fuselage panel fixed to the longitudinal beams. An internal force-absorbing frame is also included, fixed to the inner face of each longitudinal beam. The frame consists of uprights that extend opposite the circumferential beams and are fixed to multiple longitudinal beams. GlobalData’s report on Latecoere gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Latecoere, fiber-reinforced material joining techniques was a key innovation area identified from patents. Latecoere's grant share as of September 2023 was 43%. Grant share is based on the ratio of number of grants to total number of patents.
Patent granted for an aircraft pressurized cabin door structure
A recently granted patent (Publication Number: US11753139B2) describes an innovative design for an aircraft pressurized door. The door structure includes two circumferential beams arranged on the lateral edges of the door, with a plurality of longitudinal beams positioned between them in a longitudinal direction. The fuselage panel is fixed to the longitudinal beams. Each longitudinal beam has an open profile with an outer face to which the fuselage panel is fixed and an inner face facing the inside of the cabin. The door structure also includes an internal force-absorbing frame fixed to the inner face of each longitudinal beam, consisting of uprights that extend opposite a circumferential beam and are fixed to several longitudinal beams.
The internal force-absorbing frame connects the inner face of each longitudinal beam to the inner face of the neighboring longitudinal beam. The circumferential beams are also open profiles with an outer face to which the fuselage panel is fixed and an inner face facing the inside of the cabin. The inner face and outer face of the circumferential beams are parallel. Both the longitudinal beams and circumferential beams have webs that are fixed to each other. The door includes a mechanical connection between each end of the longitudinal beams and a circumferential beam.
The internal force-absorbing frame consists of uprights that include tie rods extending in an oblique direction with respect to the longitudinal direction. The oblique direction forms an angle between 30° and 60° with the longitudinal direction. The tie rods are arranged as saw teeth and are connected together two by two. Each tie rod extends between a fastening point on a longitudinal beam and either a fastening point on a circumferential beam or a neighboring longitudinal beam.
The internal force-absorbing frame also includes cornices with undulated edges fixed to the circumferential beams. Each cornice has a succession of zones of bumps and zones of hollows fixed alternately on the inner faces of the longitudinal beams. The door structure comprises a first set and a second set of longitudinal beams, with the longitudinal beams spaced by an identical pitch in each set. The longitudinal beams are perpendicular to the circumferential beams. Additionally, the door structure includes locking stops associated with every other longitudinal beam.
This patented aircraft pressurized door design offers improved structural integrity and force absorption capabilities. The use of circumferential and longitudinal beams, along with the internal force-absorbing frame, enhances the overall strength and stability of the door. The arrangement of tie rods and cornices further contributes to the door's ability to withstand pressure differentials during flight. The design also allows for easy installation and maintenance of the door structure. Overall, this patented technology represents a significant advancement in aircraft door design, ensuring passenger safety and comfort during flight.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
