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A method for privately transferring filtered air through a partition of a compartment in an aircraft cabin to equalize a pressure difference between the inside and outside the compartment via a vent assembly comprising two substantially structurally identical vent halves joining together in a lockin

A method for privately transferring filtered air through a partition of a compartment in an aircraft cabin to equalize a pressure difference between the inside and outside the compartment via a vent assembly comprising two substantially structurally identical vent halves joining together in a locking manner through a vent opening in the partition. Each vent half comprising integrally molded rim, frame, plurality of louvers fixed within the frame, latch, keeper, guide prong, and a installation index key; plastic injection molded from high strength unreinforced polycarbonate.

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1. A method for privately transferring air through a partition of a compartment in an aircraft cabin, the method comprising the steps of: installing a vent assembly through the partition of the compartment, the vent assembly comprising:a first and second substantially identical vent halves joining i

1. A method for privately transferring air through a partition of a compartment in an aircraft cabin, the method comprising the steps of: installing a vent assembly through the partition of the compartment, the vent assembly comprising:a first and second substantially identical vent halves joining in a locking manner,each substantially identical vent half further comprising a guiding prong, a plurality of latching prongs having latching tips on their distal ends, a plurality of keeping prongs, a plurality of louvers, an installation orientation index key for providing orientation of the vent in the compartment partition,where the keeping prongs comprise a plurality of rectangular blocks which interact with the latching tips to maintain a fix coupling between the vent halves, andthe louvers on one vent half, with the vent halves joined together, are not in contact with the louvers on the joining vent half, enabling a solid particle filtering, staggered flow pattern through the vent;and ventilating the compartment through the vent assembly. 2. The air transfer method of claim 1, where the vent halves are high strength unreinforced polycarbonate plastic. 3. The air transfer method of claim 1, where the fixed louvers within the vent half frame are at about a 68 degree angle with the substantially planar face of the frame at a spacing of about 0.5 inches between the louvers, the louvers have a thickness of about 0.12 inches. 4. The air transfer method of claim 1, where the vent can withstand a pressure of 4.7 psid or more equalizing the pressure across the partition. 5. A pressure control vent for installation in a compartment partition of an aircraft cabin to promptly equalize pressure differentials to avoid structural distortion comprising: a first and second substantially identical vent halves joining in a locking manner,each substantially identical vent half further comprising a guiding prong, a plurality of latching prongs, a plurality of keeping prongs having latching tips on their distal ends, a plurality of louvers, an installation orientation index key for providing orientation of the vent in the compartment partition,where the keeping prongs comprise a plurality of rectangular blocks which interact with the latching tips to maintain a fixed coupling between the vent halves, andthe louvers on one vent half, with the vent halves joined together, are not in contact with the louvers on the joining vent half, enabling a solid particle filtering, staggered flow pattern through the vent. 6. The pressure control vent of claim 5, wherein each vent half comprises high strength unreinforced polycarbonate plastic and includes an integrally molded mounting rim, a frame, the plurality of fixed louvers within the frame, and the plurality of latching, guiding and keeping prongs. 7. The pressure control vent of claim 5, wherein each vent half is made of a material selected from the group consisting of plastic, nylon, and metal. 8. The pressure control vent of claim 5, wherein each vent half is manufactured by a method selected from the group consisting of injection molding, machining, and stamping. 9. The pressure control vent of claim 6, where the frame has a substantially planar face and a substantially planar back, the rim has a substantially planar face and a substantially planar back,the face of the rim comprise the face of the vent half, andthe back of the frame comprise the back and the inward direction of the vent half. 10. The pressure control vent of claim 6, wherein the individual louvers have a substantially air foil shape with a thicker leading edge toward the face of the vent half, and a thinner trailing edge toward the back of the vent half. 11. The pressure control vent of claim 6, wherein the installation orientation index key is fixed on the outside of the frame at the intersection of the frame and the back of the rim, where the installation orientation index key couples to an alignment notch on the compartment partition to provide for installation orientation of the vent with respect to the compartment partition. 12. The pressure control vent of claim 6, wherein the louvers form a prespecified angle with the frame; when installed, providing for line-of-sight privacy of the interior of the compartment from outside of the compartment and providing for line-of-sight visibility to the exterior of the compartment from inside of the compartment, or vice versa, with the line of sight at a same elevation on either side of the vent, with the vent half of an opaque plastic material. 13. The pressure control vent of claim 6, wherein the group of the substantially identical and equally spaced louvers within the vent half frame is not longitudinally centered in the frame. 14. The pressure control vent of claim 6, wherein the louvered vent halves are joined together back to back in an inverted and locking relation by insertion from opposite sides and through a partition. 15. The pressure control vent of claim 5, which when the vent halves are assembled they are capable of withstanding a pressure differential. 16. The pressure control vent of claim 13, wherein the frames of the first and second vent halves are aligned and joined in inverted relation with the louvers of each half adjacent in staggered relation to each other, with the louvers of one vent half not in contact with the louvers of the joining vent half, forming a discontinuous louver plane to facilitate a filtered flow of air through the vent and provide visual privacy from only one side of the vent. 17. The pressure control vent of claim 5, wherein each vent half comprise the latching, guiding and keeping prong where the keeping prongs comprise a plurality of rectangular blocks, which upon aligned vent engagement simultaneously joins the vent halves to each other, back to back, in a locking manner to form the vent for transferring air from one side of the partition to the other side of the partition. 18. The pressure control vent of claim 6, wherein the louvers are located to form an approximately 68 degree angle with the substantially planar face of the frame, wherein the substantially equal spacing between the louvers is about 0.5 inches,wherein the longitudinal fixed position of the group of the louvers within the frame is such that the distance between the first louver in the louver group from the frame is about 0.5 inch and the distance between the last louver in the louver group from the frame is about 0.25 of an inch, to provide for the longitudinal skewed positioning of the louver group within the frame of the vent half. 19. The pressure control vent of claim 13, wherein the longitudinal skewed positioning of the louver group within the frame of the vent half provides for a staggered positioning of adjacent louver ends from the back to back joining of the vent halves such that each of the discontinuous air flow passages across the opposing louvers in the vent is limited to a size of about 0.125 of an inch, filtering passage of any particle larger than 0.125 of an inch in size.