Thresholds for flooring in an aircraft
Patent Information
- Application Number
- JP2024103441
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-08-15
- Filing Date
- 2024-06-27
- Publication Date
- 2025-02-28
Smart Images
Figure 2025027974000001_ABST
Abstract
Description
[Technical field]
[0001]
[0001] The present disclosure relates generally to thresholds, and more particularly to thresholds for flooring within aircraft. [Background technology]
[0002]
[0002] Aircraft fuselages often use different types of flooring in different sections of the fuselage. For example, some sections use non-fibrous flooring (NTF), such as vinyl or rubber matting, while other sections use fibrous flooring, such as carpet. Thresholds are installed between the edges where the two floorings meet. Summary of the Invention
[0003]
[0003] The aircraft includes a subfloor, a first floor covering on the subfloor, and a second floor covering on the subfloor, the first floor covering having a first edge and the second floor covering having a second edge. The aircraft includes a threshold at least partially between the first floor covering and the second floor covering. The threshold includes a vertical body portion having an upper surface, a lower surface opposite the upper surface, a first side, and a second side opposite the first side. The vertical body portion has a recessed area at the lower surface that extends into the second side. A second edge of the second floor covering extends into the recessed area. The threshold also includes a sloped portion extending from the first side. The sloped portion decreases in thickness from the vertical body portion to a distal end of the sloped portion. The sloped portion is disposed between a portion of the first floor covering and the subfloor.
[0004]
[0004] A threshold for installation between two floorings includes a vertical body portion having an upper surface, a lower surface opposite the upper surface, a first side, and a second side opposite the first side. The second side has a recessed area at the lower surface to receive an edge of the flooring. The recessed area forms an overhang on the second side. The threshold also includes a sloped portion extending from the first side. The sloped portion decreases in thickness from the vertical body portion to a distal end of the sloped portion.
[0005]
[0005] A method of installing a flooring and threshold within an aircraft includes adhering a first portion of a first flooring to a subfloor within the aircraft, and adhering the threshold to the subfloor adjacent a first edge of the first flooring. The threshold includes a vertical body portion having an upper surface, a lower surface opposite the upper surface, a first side, and a second side opposite the first side. The vertical body portion has a recessed area at the lower surface extending into the second side. The threshold also includes a sloped portion extending from the first side. The sloped portion decreases in thickness from the vertical body portion to a distal end of the sloped portion. The method also includes adhering a second portion of the first flooring onto the sloped portion of the threshold, whereby the first edge of the first flooring is adjacent the first side of the vertical body portion. The method also includes adhering a second flooring to the subfloor and forcing the second edge of the second flooring into the recessed area of the threshold. [Brief description of the drawings]
[0006] [Figure 1]
[0006] An exemplary aircraft in which the exemplary thresholds disclosed herein may be implemented is shown. [Diagram 2]
[0007] FIG. 2 is a cross-sectional or side view of an exemplary threshold constructed in accordance with the teachings of the present disclosure. [Diagram 3]
[0008] 3 is a cross-sectional or side view of the exemplary aircraft flooring of FIG. 1 with the exemplary sill of FIG. 2. [Figure 4A]
[0009] 1 shows an example of a surge carpet edge treatment. [Figure 4B]
[0010] 1 shows an example of a speed binding carpet edge treatment. [Figure 4C]
[0011] 1 shows an example of a carpet without edge treatment. [Diagram 5]
[0012] FIG. 2 is a cross-sectional or side view of another exemplary threshold. [Figure 6]
[0013] FIG. 2 is a cross-sectional or side view of another exemplary threshold. [Figure 7]
[0014] FIG. 2 is a cross-sectional or side view of another exemplary threshold. [Figure 8]
[0015] FIG. 2 is a cross-sectional or side view of another exemplary threshold. [Figure 9]
[0016] 1 is a flow chart depicting an exemplary method of installing flooring and an exemplary threshold. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0007]
[0017] Generally, the same reference numbers are used throughout the drawing(s) and accompanying specification to designate the same or similar parts. The drawings are not necessarily to scale. Instead, the drawings may exaggerate the thickness of layers or regions. Although the figures show layers and regions with distinct lines and boundaries, some or all of such lines and / or boundaries may be idealized. In reality, the boundaries and / or lines may be unobservable, blended, and / or irregular.
[0008]
[0018] Disclosed herein are exemplary thresholds (sometimes called transition strips) that may be installed at the seam between two floorings. Thresholds are used to create a smooth transition where the edges of two floorings meet. Thresholds are commonly used between different flooring sections in aircraft. For example, aircraft galleys often use mat or plastic flooring, while passenger areas of the fuselage have carpet flooring. A threshold may be installed between the edge of the mat and the edge of the carpet. The threshold not only helps to prevent the mat and / or carpet from lifting, but also allows for a smooth transition between floorings of different thicknesses.
[0009]
[0019] The known threshold is relatively bulky and creates a significant step between the two flooring materials that can be cumbersome for wheeled devices such as galley carts, luggage, wheelchairs, knee scooters, etc. Furthermore, the known threshold has long arms that extend over and beyond both flooring materials. These arms create weak points in the threshold that are prone to cracking, chipping, warping, and shrinkage problems.
[0010]
[0020] Disclosed herein is a low profile threshold that does not create a large step as seen in known threshold designs. This allows galley carts and other wheeled devices to easily roll between the two floorings without creating a noticeable step. The exemplary threshold disclosed herein is also less prone to failure, reducing costs associated with aircraft maintenance. The exemplary threshold disclosed herein is lighter and constructed with less material than known thresholds. Thus, the exemplary threshold disclosed herein is less expensive to manufacture. The exemplary threshold disclosed herein can be used in new installations or can be retrofitted to existing floorings during refreshes (e.g., every 3-6 months).
[0011]
[0021] Exemplary thresholds disclosed herein include a vertical body portion and a ramp. In some embodiments, the threshold is constructed as a single or integral piece (e.g., monolithic structure), such as through an extrusion process. In some embodiments, the threshold is constructed of thermoplastic polyurethane (TPU). The vertical body portion is disposed between an edge of a first flooring material and an edge of a second flooring material. The ramp extends from a first side of the vertical body portion and is placed under the first flooring material (e.g., a mat). The ramp is thickened to bring the first flooring material closer to the height of the second flooring material (e.g., a carpet). The second side of the vertical body portion has a recessed area (e.g., a concave or recessed portion) that forms a small overhang. The edge of the second flooring material is pressed into the recessed area. The small overhang reduces or limits the amount that the edge of the second flooring material can lift. The overhang is relatively small compared to the arms of known thresholds. This reduces or limits weak points that can lead to cracks.
[0012]
[0022] Although the exemplary thresholds disclosed herein are described in connection with floors within an aircraft, the exemplary thresholds disclosed herein may also be used in connection with any floor, for example, the thresholds may be used in other types of vehicles (e.g., buses, trains, etc.), residential buildings, commercial buildings, and / or any other location where a threshold is commonly used between two flooring materials.
[0013]
[0023] 1 illustrates an example aircraft 100 in which embodiments disclosed herein may be implemented. In the illustrated embodiment, the aircraft 100 includes a fuselage 102, a first wing 104 (left wing) coupled to the fuselage 102, a second wing 106 (right wing) coupled to the fuselage 102, and a tail 108 at the aft end of the fuselage 102. The tail 108 has a horizontal stabilizer 110 and a vertical stabilizer 112. The aircraft 100 also includes a first engine 114 supported by the first wing 104 and a second engine 116 supported by the second wing 106. In other embodiments, the aircraft 100 may have multiple engines coupled to each of the first wing 104 and the second wing 106 and / or located elsewhere on the aircraft 100 (e.g., coupled to the tail 108, coupled to the fuselage 102, etc.).
[0014]
[0024] The fuselage 102 of the aircraft 100 carries passengers and / or cargo. The fuselage 102 may include one or more floors or levels having flooring. The flooring may include, for example, carpeting and / or matting. Disclosed herein are exemplary thresholds that may be used between edges or seams where two floorings meet.
[0015]
[0025] 2 is a cross-sectional or side view of an example threshold 200 that may be used in example aircraft 100. For example, threshold 200 may be used as a transition between two flooring materials (e.g., mats and carpets) in fuselage 102 of aircraft 100. Threshold 200 provides a smooth transition between the flooring materials to reduce (e.g., minimize) bumps as well as reduce (e.g., minimize) damage to the flooring materials.
[0016]
[0026] The threshold 200 has one or more parts or sections. In one embodiment shown, the threshold 200 has a vertical body portion 202 and a sloped portion 204 coupled to and extending from the vertical body portion 202. When the threshold 200 is installed between two floorings, the vertical body portion 202 is disposed between the edges of the two floorings, and the sloped portion 204 extends under one of the floorings to help raise the flooring to the same height as the other flooring. The threshold 200 can be constructed to any length (dimensions extending into and out of the page). As shown in FIG. 2, the vertical body portion 202 has a generally rectangular cross-sectional shape. The vertical body portion 202 has an upper surface 206, a lower surface 208 opposite the upper surface 206, a first side 210, and a second side 212 opposite the first side 210.
[0017]
[0027] In one embodiment shown, the vertical body portion 202 has a recessed area 214 at the lower surface 208 that extends into the second side surface 212. Stated differently, the second side surface 212 has or forms a recessed area 214 at the lower surface 208. The recessed area 214 may also be referred to as a recess or a concave shape. The recessed area 214 receives an edge of a flooring material, as will be described in more detail herein. The recessed area 214 forms an overhang 215 that extends outwardly from the upper surface 206 on the second side surface 212. The overhang 215 helps prevent the flooring material from lifting, as will be described in more detail herein.
[0018]
[0028] As shown in FIG. 2 , the vertical body portion 202 of the threshold 200 has a first edge 216 between the top surface 206 and the first side 210. In one illustrated embodiment, the first edge 216 is curved or rounded. In some embodiments, the first edge 216 has a constant radius of curvature. The threshold 200 also has a second edge 218 between the top surface 206 and the second side 212. In one illustrated embodiment, the second edge 218 is curved or rounded. In some embodiments, the second edge 218 has a constant radius of curvature. In some embodiments, the first edge 216 and the second edge 218 have a radius of curvature of 0.035 inches. In other embodiments, the radius of curvature may be greater or lesser. In some embodiments, the first edge 216 and the second edge 218 are curved or rounded to provide a smooth transition along the top surface 206 of the threshold 200 .
[0019]
[0029] In one exemplary embodiment of FIG. 2, the top surface 206 of the vertical body portion 202 is curved or rounded (e.g., convex) between the first edge 216 and the second edge 218. This curved or rounded shape helps to accommodate any tolerance between the height of the mat 304 and the carpet 306 shown in FIG. 3. Thus, this curved or rounded shape helps to provide a smooth transition between the flooring materials. In some embodiments, the top surface 206 has a continuous curvature between the first edge 216 and the second edge 218. In some embodiments, the curvature of the top surface 206 has a constant radius of curvature between the first edge 216 and the second edge 218. In some embodiments, the radius of curvature is 2 inches. In other embodiments, the radius of curvature may be greater or less. In other embodiments, the curvature of the top surface 206 may have a radius of curvature that varies between the first edge 216 and the second edge 218.
[0020]
[0030] In the illustrated embodiment, the ramp 204 extends from the first side 210 of the vertical body portion 202 at the lower surface 208. The ramp 204 has an upper surface 220, a lower surface 222 opposite the upper surface 220, and a distal end 224. In an exemplary embodiment, the distal end 224 of the ramp 204 is rounded or curved. However, in other embodiments, the distal end 224 may have a sharp corner (e.g., a 90 degree corner). The lower surface 222 of the ramp 204 is continuous with the lower surface 208 of the vertical body portion 202. The lower surface 222 and the lower surface 208 thus form the lower side or surface 226 of the sill 200. The ramp 204 has a thickness (e.g., height) that decreases from the vertical body portion 202 (right side in FIG. 2 ) to the distal end 224 of the ramp 204 (left side in FIG. 2 ). Stated another way, the sloped portion 204 increases in thickness from the distal end 224 to the vertical body portion 202. For example, as shown in FIG. 2, the sloped portion 204 has a first thickness T1 at the distal end 224 and a second thickness T2 at the junction with the vertical body portion 202. Thickness T2 is greater than thickness T1. This increased thickness raises the flooring to a height that is closer to the top surface 206 of the threshold 200 or other flooring.
[0021]
[0031] In some embodiments, the threshold 200 is constructed of a thermoplastic polyurethane (TPU). For example, the threshold can be constructed of Lubrizol ESTANE® 58244, an ether-based TPU. This type of material is highly durable and dimensionally stable. In other embodiments, the threshold 200 is constructed of a polyvinyl chloride (PVC), such as BMS8-137. In other embodiments, the threshold 200 can be constructed of other types of materials. In this embodiment, the threshold 200 is constructed as a single or monolithic structure. For example, the threshold 200 can be manufactured via an extrusion or molding process. In other embodiments, the threshold 200 can be constructed of two or more separate pieces (e.g., the vertical body portion 202 and the sloped portion 204) that are joined together (e.g., via a bonding process) to form the threshold 200. The threshold 200 can be constructed of any length depending on the length of the edge of the flooring.
[0022]
[0032] Various dimensions are shown in FIG. 2. The threshold 200 has an overall height H1 between the lower surface 226 and the upper surface 206. The first side 210 has a height H2 between the upper surface 220 of the sloped portion 204 and the upper surface 206 of the vertical body portion 202. The lower surface 226 of the threshold 200 has a width W1. The vertical body portion 202 has a width W2. The sloped portion 204 increases in thickness from T1 to T2. The overhang 215 has a width W3 and a height H3. The dimensions may be based on the type and / or thickness of flooring between which the threshold is required. In some embodiments, the ratio W1 / W2 is greater than 2 or 3. This is because the sloped portion 204 is relatively wider (horizontally) compared to the vertical body portion. In some embodiments, having a larger width W1 provides more stability and rigidity to the threshold 200, while providing enough material to tuck under the flooring (e.g., mat) to help hold down the threshold 200, while providing an adequate underside for the width of the adhesive or double-sided tape. This results in a longer, more gradual rise in the height of the flooring, which can also reduce (e.g., minimize) any noticeable step in the flooring. In some embodiments, reducing the width W2 is aesthetically advantageous because it reduces (e.g., minimizes) the amount of visible plastic (more plastic is generally less aesthetically pleasing).
[0023]
[0033] 3 is a cross-sectional view of a portion of a floor 300 within the fuselage 102 ( FIG. 1 ) of the aircraft 100 ( FIG. 1 ) in which the sill 200 is used. In one illustrated embodiment, the floor 300 includes a sub-floor 302. One or more flooring materials are laminated onto the sub-floor 302. The sub-floor 302 may be constructed of one or more floor panels of a variety of materials. In some embodiments, the sub-floor 302 is constructed of a composite material, such as a honeycomb core with graphite or fiberglass plies above and below it. In other embodiments, the sub-floor 302 may be constructed of other materials (e.g., wood, plastic, etc.).
[0024]
[0034] Floor 300 of aircraft 100 includes a first floor covering 304 on subfloor 302 and a second floor covering 306 on subfloor 302. In this example, first floor covering 304 is a mat (e.g., a vinyl mat) and is referred to herein as mat 304. Second floor covering 306 is a carpet and is referred to herein as carpet 306. Threshold 200 is at least partially disposed between mat 304 and carpet 306 and provides a smooth transition between mat 304 and carpet 306. For example, mat 304 may be a floor covering in a galley of fuselage 102 ( FIG. 1 ) and carpet 306 may be a floor covering in a passenger seating area of fuselage 102. Threshold 200 provides a smooth transition between these two different floor coverings and areas of fuselage 102. In some examples, mat 304 and carpet 306 have different heights or thicknesses relative to subfloor 302. Thus, the threshold 200 also provides a smooth transition between two different heights. In other embodiments, the first floor covering 304 and the second floor covering 306 can be other types and / or combinations of materials, such as carpet and carpet, mat and mat, carpet and laminate, mat and laminate, etc.
[0025]
[0035] In one illustrated embodiment, the threshold 200 is disposed on the sub-floor 302. In some embodiments, the threshold 200 is coupled to the sub-floor 302 via an adhesive. For example, as shown in FIG. 3, an adhesive layer 308 is disposed between the underside 226 of the threshold 200 and the sub-floor 302. The adhesive layer 308 holds the threshold 200 in place on the sub-floor 302. In some embodiments, the adhesive layer 308 is a tape, such as a double-sided tape (e.g., BMS 5-133 Type II, Class 2 tape). In some embodiments, the adhesive layer 308 is a self-adhesive layer on the underside 226 of the threshold 200. In other embodiments, other types of adhesives (e.g., glue) may be used. Additionally, in other embodiments, no adhesive layer is used. Instead, the underside 226 of the threshold 200 may be in direct contact with the sub-floor 302 and / or may be coupled to the sub-floor 302 via other mechanisms (e.g., nails, screws, etc.).
[0026]
[0036] The mat 304 has an upper surface 310, a lower surface 312, and a first edge 314. The carpet 306 has an upper surface 316, a lower surface 318, and a second edge 320. In some embodiments, the mat 304 and the carpet 306 have different thicknesses. For example, as shown in FIG. 3, the mat 304 has a thinner thickness than the carpet 306. The threshold 200 is disposed at least partially between the edge 314 of the mat 304 and the edge 320 of the carpet 306 and is used to create a smooth transition between the two types of flooring and their respective heights.
[0027]
[0037] In one embodiment shown, a portion of the mat 304 is placed on or over the sloped portion 204 of the threshold 200. In other words, the sloped portion 204 is between a portion of the mat 304 and the subfloor 302. In some embodiments, the weight of the portion of the mat 304 on the sloped portion 204 helps to hold the threshold 200 in place. Additionally, as discussed above, the mat 304 may be thinner than the carpet 306. Thus, the sloped portion 204 gradually increases the height of the mat 304 so that the top surface 310 of the mat 304 is closer to or the same height as the top surface 206 of the threshold 200 and the top surface 316 of the carpet 306. This allows the wheeled device to easily and smoothly roll between the two flooring materials.
[0028]
[0038] In some embodiments, the mat 304 is bonded to the subfloor 302 via an adhesive layer. For example, FIG. 3 shows an exemplary adhesive layer 322 on the underside 312 of the mat 304. The adhesive layer 322 helps the mat 304 adhere to the subfloor 302 to prevent or limit movement. Also, as shown in FIG. 3, the adhesive layer 322 is also between the underside 312 of the mat 304 and the upper side 220 of the ramp 204. This allows the sill 200 to remain bonded to the mat 304, reducing or limiting relative movement between the mat 304 and the sill 200. In some embodiments, the adhesive layer 322 is a self-adhesive layer manufactured with the mat 304, and a liner is provided over the self-adhesive layer. Before installing the mat 304, the liner is peeled off to expose the self-adhesive layer. In other embodiments, the adhesive layer 322 can be another type of adhesive, such as a tape (e.g., double-sided tape).
[0029]
[0039] In some embodiments, the first edge 314 of the mat 304 does not extend all the way to the first side 210 of the vertical body portion 202 of the threshold 200. As shown in FIG. 3, a sealant 324 is disposed between the first edge 314 of the mat 304 and the first side 210 of the vertical body portion 202. The sealant 324 may be, for example, BAC5010 TY 60 (RTV108-silicone sealant), BMS5-142, BMS5-45, or another type of sealant. The sealant 324 fills the gap or space between the first edge 314 of the mat 304 and the first side 210 of the threshold 200 and provides a smooth transition between the top surface 310 of the mat 304 and the top surface 206 of the threshold 200. The sealant 324 also prevents liquids from getting under the mat 304.
[0030]
[0040] In one embodiment shown, the second edge 320 of the carpet 306 extends (e.g., is pressed into) the recessed area 214 formed in the second side 212 of the threshold 200. In some embodiments, the second edge 320 of the carpet 306 contacts the second side 212 of the threshold 200. As shown in FIG. 3, the second edge 320 of the carpet 306 is rolled or curved. In some embodiments, the second edge 320 of the carpet 306 is hemmed to help prevent the carpet 306 from fraying. FIGS. 4A and 4B show two exemplary hemming treatments for the carpet 306, including surge and speed binding. In other embodiments, other types of hemming treatments may be implemented. Other embodiments, such as that shown in FIG. 4C, may not have hemming treatments. Referring back to FIG. 3, in some embodiments, the carpet 306 is bonded to the subfloor via an adhesive layer 326. In some embodiments, the carpet 306 is manufactured with a self-adhesive layer or sticky dots on the underside 318 and is covered with a liner. Prior to installing the carpet 306, the liner may be peeled off and the carpet 306 may then be pressed onto the subfloor 302.
[0031]
[0041] As shown in FIG. 3, the second edge 320 of the carpet 306 is disposed within the recessed area 214. Thus, the overhang 215 of the threshold 200 is above (e.g., overhangs) a portion of the carpet 306. The overhang 215 limits or prevents the second edge 320 of the carpet 306 from lifting away from the subfloor 302. The design of the recessed area 214 and the overhang 215 also reduces (e.g., minimizes) or limits any gap between the threshold 200 and the carpet 306. The overhang 215 is relatively small compared to known thresholds with long arms that extend over and over the carpet 306. In some embodiments, the overhang 215 has a width W3 (FIG. 2) of less than about 0.100 inches (e.g., ±0.01 inches) in the horizontal direction. Known thresholds with long arms extend horizontally by about 1 inch or more. Thus, in some embodiments, the overhang 215 is about 1 / 10 the size of a conventional arm of a threshold. A smaller overhang can reduce or eliminate weak points for cracking and / or lifting. In other embodiments, the overhang 215 can have a width W3 that is greater than 0.100 inches. The width W3 can depend on the type and / or size of the flooring.
[0032]
[0042] As shown in Figure 3, the upper surface 206 of the threshold 200 provides a smooth transition between the upper surface 310 of the mat 304 and the upper surface 316 of the carpet 306. The transition is relatively small and does not result in a significant step as is found in known thresholds. This allows a wheeled device to easily traverse over the transition between the mat 304 and the carpet 306. This also reduces shock and therefore wear on the threshold 200, thereby increasing the lifespan of the threshold 200.
[0033]
[0043] As disclosed above, various dimensions of threshold 200 may be selected based on the type and / or size of flooring. In some embodiments, threshold 200 is sized to accommodate various thicknesses of flooring. For example, assume mat 304 has a minimum thickness of 0.059 inches and a maximum thickness of 0.132 inches, and carpet 306 has a minimum thickness of 0.14 inches and a maximum thickness of 0.47 inches. In one such embodiment, referring to FIG. 2, overall height H1 is 0.17 inches, height H2 is 0.11 inches, width W1 is 1.4 inches, width W2 is 0.40 inches, thickness T1 is 0.04 inches, thickness T2 is 0.06 inches, width W3 of overhang 215 is 0.100 inches, and height H3 of overhang 215 is 0.123 inches. These dimensions allow threshold 200 to be used with mats and carpets having thicknesses in the above ranges commonly found on aircraft. However, in other embodiments, threshold 200 may be constructed to have different dimensions. For example, for thicker / taller carpet, thickness T1 and height H1 may be greater. As another example, height H3 of overhang 215 may be greater or smaller depending on the thickness of the carpet. In some embodiments, height H3 of overhang 215 may range from 0.123 inches to 0.400 inches.
[0034]
[0044] In the illustrated embodiment, the threshold 200 has an overhang 215 on one side and a sloped portion 204 on the opposite side. In this embodiment, the first side 210 of the vertical body portion 202 does not have an overhang or arm that overhangs the mat 304. Additionally, the second side 212 does not have a sloped portion that extends below the carpet 306. Thus, the threshold 200 has an overhang on one side and a sloped portion on the opposite side. This minimalist design results in less material, is lighter, and reduces manufacturing costs. However, in other embodiments, the threshold 200 may have an overhang and / or sloped portion on both sides.
[0035]
[0045] 5-8 illustrate another exemplary threshold that may be implemented in aircraft 100 between mat 304 and carpet 306. The exemplary threshold is similar to threshold 200, except as described and illustrated below. Any of the exemplary aspects (e.g., dimensions, materials, etc.) disclosed in connection with threshold 200 may be similarly applied to the threshold of FIGS. 5-8.
[0036]
[0046] FIG. 5 shows an exemplary threshold 500 having a vertical body portion 502 and a sloped portion 504. The vertical body portion 502 has a first side 506 and a second side 508. In this embodiment, the first side 506 has an overhang 510. Thus, when the mat 304 is installed, the overhang 510 is above or overhangs a portion of the mat 304. This limits or prevents the mat 304 from lifting. Additionally, as shown in FIG. 5, a recessed area 512 is formed in the second side 508. The recessed area 512 is larger than the recessed area 214 disclosed above. Thus, the vertical body portion 502 forms a larger arm 514 that overhangs the carpet 306 (FIG. 3).
[0037]
[0047] FIG. 6 illustrates an exemplary sill 600 having a substantially similar shape to the sill 200 of FIGS. 2 and 3. However, in FIG. 6, the sill 600 has a channel 602 that extends into the underside 604 of the vertical body portion 606. The channel 602 helps to keep the thickness of the sill 600 more consistent throughout the extrusion process. This helps to improve the quality of the extrusion (e.g., minimizing potential flow due to cooling rates and material flow). The channel 602 also helps to reduce (e.g., minimize) material usage and weight.
[0038]
[0048] FIG. 7 shows an exemplary threshold 700 having a vertical body portion 702 and a sloped portion 704. The vertical body portion 702 and the sloped portion 704 are similar to the vertical body portion 202 and the sloped portion 204 disclosed above. However, in this embodiment, the sloped portion 704 is relatively wide compared to the width of the vertical body portion 702 (in the horizontal direction of FIG. 7). Furthermore, the vertical body portion 702 is relatively short compared to the other vertical body portions. Thus, the threshold 700 may be advantageously used with thinner flooring. The longer the slope, the more gentle the slope of the flooring.
[0039]
[0049] 8 shows an exemplary threshold 800 having a vertical body portion 802 and a sloped portion 804. The threshold 800 is substantially the same as the threshold 700 of FIG. 7. However, the threshold 800 has a shorter sloped portion. Also, the vertical body portion 802 is taller. Thus, the threshold 800 is advantageous for use with thicker flooring.
[0040]
[0050] 9 is a flow chart depicting an example method 900 of installing flooring and an example threshold 200 within an aircraft, such as aircraft 100. The example method 900 is disclosed in connection with a mat 304 as a first flooring and a carpet 306 as a second flooring. However, the example method may be performed in connection with other types of flooring as well. Additionally, the example method 900 may be implemented in connection with other types of thresholds, such as the thresholds of FIGS. 5-8.
[0041]
[0051] At block 902, the method 900 includes placing the mat 304 in a desired location on the sub-floor 302, such as by one or more installers. The installer(s) then adhere a first portion of the mat 304 to the sub-floor 302. For example, the installer(s) may lift a corner or section of the mat 304 to remove the liner and expose the adhesive layer 322 (e.g., a self-adhesive layer). The mat 304 is then replaced on the sub-floor 302 to adhere a first portion of the mat 304 to the sub-floor 302. All of the mat 304 is adhered to the sub-floor 302, except for a second portion along the first edge 314. In some embodiments, a liner is retained on the underside of the mat 304 along the second portion so that the mat 304 is not inadvertently adhered to the sub-floor 302. In other embodiments, the mat 304 may be adhered to the sub-floor 302 using double-sided tape that is not already placed on the mat 304.
[0042]
[0052] At block 904, the method 900 includes placing the threshold 200 in a desired location along the vicinity of the first edge 314 of the mat 304. In some embodiments, the threshold 200 may be adhered to the sub-floor 302 using an adhesive layer 308. In some embodiments, the adhesive layer 308 is a double-sided tape. In one such embodiment, the double-sided tape may first be adhered to the underside 226 of the threshold 200, and then the threshold 200 may be adhered to the sub-floor 302. In other embodiments, the adhesive layer 308 may be a self-adhesive layer already on the underside 226 of the threshold 200. Thus, the method 900 may include placing the threshold 200, peeling off a liner that covers the self-adhesive layer, and then adhering the threshold 200 to the sub-floor 302. In some embodiments, prior to adhering the threshold 200, the sub-floor 302 is prepared by vacuuming and / or applying a cleaning solvent for good bonding.
[0043]
[0053] At block 906, the method 900 includes peeling the liner from the mat 304 and adhering a second portion of the mat 304 onto the sloped portion 204 of the sill 200 such that the first edge 314 of the mat 304 is adjacent the first side 210 of the vertical body portion 202. Thus, the mat 304 is bonded to the sloped portion 204 of the sill 200.
[0044]
[0054] At block 908, the method 900 includes placing the carpet 305 in a desired location on the subfloor 302. The carpet 306 is positioned such that the second edge 320 extends under the overhang 215 of the threshold 200. The installer(s) then adheres the carpet 306 to the subfloor 302 (e.g., via an adhesive layer 326) and presses the second edge 320 of the carpet 306 into the recessed area 214 of the threshold 200 (and under the overhang 215). The adhesive layer 326 can be, for example, a self-adhesive layer or can be a double-sided tape.
[0045]
[0055] At block 910 , the method 900 includes adding a sealant 324 between the first edge 314 of the mat 304 and the first side 210 of the vertical body portion 202 .
[0046]
[0056] In other embodiments, the flooring and threshold 200 may be installed in a different order or sequence. For example, the carpet 306 may be installed before the mat 304.
[0047]
[0057] As used herein, unless otherwise specified, the term "above" describes the relationship of two portions to the Earth. A first portion is above a second portion if the second portion has at least one portion between the Earth and the first portion. Similarly, as used herein, a first portion is "below" a second portion if the first portion is closer to the Earth than the second portion. As noted above, a first portion can be above or below a second portion if there is one or more of the following: there is another portion between, there is no other portion between, the first portion and the second portion are in contact, or the first portion and the second portion are not in direct contact with each other.
[0048]
[0058] As used in this patent application, a statement that any part (e.g., a layer, film, area, region, or plate) is in any manner on (e.g., placed, positioned, disposed, formed, etc.) another part indicates that the part being referenced is in contact with the other part or that the part being referenced is above the other part with one or more intermediate parts disposed therebetween.
[0049]
[0059] As used herein, connection references (e.g., attached, coupled, connected, and coupled) may include intermediate material between and / or relative movement between the elements referenced by the connection reference, unless otherwise indicated. Thus, a connection reference does not necessarily imply that two elements are directly connected and / or in fixed relationship to one another. As used herein, a statement that any part is "in contact" with another part is defined to mean that there is no intermediate part between the two parts.
[0050]
[0060] Unless otherwise specified, descriptions such as "first," "second," "third," and the like are used herein without attributing or implying any sense of priority, physical order, placement in a list, and / or order in any manner, but are merely used as labels and / or arbitrary names to distinguish elements to facilitate understanding of the disclosed embodiments. In some embodiments, a description "first" may be used to refer to an element in the detailed description, but the same element may be referred to by a different description, such as "second" or "third," in the claims. In such instances, it should be understood that such descriptors are merely used to clearly identify elements in the context of discussion (e.g., in the claims) that may otherwise share the same name.
[0051]
[0061] As used herein, "approximately" and "about" modify their subject matter / values to recognize the potential existence of variations that occur in real world applications. For example, "approximately" and "about" may modify dimensions that may not be exact due to manufacturing tolerances and / or other real world imperfections, as would be understood by one of ordinary skill in the art. For example, "approximately" and "about" may indicate that such dimensions are within a tolerance of ±10%, unless otherwise specified in the following description.
[0052]
[0062] "Including" and "comprising" (and all forms and tenses thereof) are used herein as open-ended terms. Thus, whenever a claim uses any form of "include" or "comprise" (e.g., comprises, includes, comprising, including, having, etc.) as a preamble or within any type of claim recitation, it is to be understood that additional elements, terms, etc. may be present without departing from the scope of the corresponding claim or recitation. As used herein, the phrase "at least" is open-ended in the same way that the words "comprising" and "comprising" are open-ended when used, for example, as a transition term in the preamble of a claim. For example, when the term "and / or" is used in a format such as A, B, and / or C, it means any combination or subset of A, B, and / or C, such as (1) A only, (2) B only, (3) C only, (4) A and B, (5) A and C, (6) B and C, and (7) A, B and C. As used herein, in the context of describing structures, components, articles, objects, and / or things, the phrase "at least one of A and B" is intended to refer to embodiments that include either (1) at least one A, (2) at least one B, and (3) at least one A and at least one B. Similarly, as used herein, in the context of describing structures, components, articles, objects, and / or things, the phrase "at least one of A or B" is intended to refer to embodiments that include either (1) at least one A, (2) at least one B, and (3) at least one A and at least one B.As used herein, in the context of describing the implementation or performance of a process, instruction, operation, and / or step, the phrase "at least one of A and B" is intended to refer to an embodiment that includes either (1) at least one A, (2) at least one B, or (3) at least one A and at least one B. Similarly, as used herein, in the context of describing the implementation or performance of a process, instruction, operation, and / or step, the phrase "at least one of A or B" is intended to refer to an embodiment that includes either (1) at least one A, (2) at least one B, or (3) at least one A and at least one B.
[0053]
[0063] As used herein, singular references (e.g., "a," "an," "first," "second," etc.) do not exclude a plurality. As used herein, the term "a" or "an" object refers to one or more of that object. The terms "a" (or "an"), "one or more," and "at least one" are used interchangeably herein. Furthermore, although individually listed, multiple means, elements, or actions may be performed, for example, by the same entity or object. In addition, although individual features may be included in various examples or claims, such features may be combined with one another, and inclusion in various examples or claims does not imply that a combination of features is not feasible and / or advantageous.
[0054]
[0064] From the foregoing, it will be appreciated that exemplary systems, apparatus, articles of manufacture, and methods have been disclosed that provide a smooth transition between two flooring materials. The exemplary low profile threshold disclosed herein reduces or eliminates any noticeable step or height discontinuity between the two flooring materials, thereby reducing or eliminating the difficulty of moving a wheeled device over the threshold. The exemplary threshold disclosed herein is lighter, uses less material, and is less prone to failure than known thresholds, resulting in significant cost savings.
[0055]
[0065] The embodiments and combinations of the embodiments disclosed herein include the following:
[0056]
[0066] Example 1 is an aircraft comprising a subfloor, a first floor covering on the subfloor, a second floor covering on the subfloor, and a threshold at least partially disposed between the first floor covering and the second floor covering, the first floor covering having a first edge and the second floor covering having a second edge. The threshold includes a vertical body portion having an upper surface, a lower surface opposite the upper surface, a first side, and a second side opposite the first side. The vertical body portion has a recessed area at the lower surface that extends into the second side. A second edge of the second floor covering extends into the recessed area. The threshold also includes a sloped portion extending from the first side. The sloped portion has a thickness that decreases from the vertical body portion to a distal end of the sloped portion. The sloped portion is disposed between a portion of the first floor covering and the subfloor.
[0057]
[0067] Example 2 includes the aircraft of example 1, wherein the recessed area forms an overhang on the second side, the overhang having a width less than 0.100 inches.
[0058]
[0068] Example 3 includes the aircraft of examples 1 or 2, wherein the sill is constructed of thermoplastic polyurethane (TPU).
[0059]
[0069] Example 4 includes the aircraft of any one of examples 1-3, wherein the sill is a monolithic structure.
[0060]
[0070] Example 5 includes the aircraft of any one of Examples 1 to 4, wherein the vertical body section has a first edge between the upper surface and the first side and a second edge between the upper surface and the second side, and the upper surface of the vertical body section is curved between the first edge of the vertical body section and the second edge of the vertical body section.
[0061]
[0071] Example 6 includes the aircraft of example 5, wherein the first edge of the vertical body section is rounded and the second edge of the vertical body section is rounded.
[0062]
[0072] Example 7 includes the aircraft of any one of Examples 1 to 6, further including an adhesive layer between the lower surface of the sill and the subfloor.
[0063]
[0073] Example 8 includes the aircraft of Example 7, where the adhesive layer is a double-sided tape.
[0064]
[0074] Example 9 includes the aircraft of any one of examples 1 to 8, further including an adhesive layer between the first flooring and the upper surface of the ramp.
[0065]
[0075] Example 10 includes the aircraft of any one of examples 1-9, further including a sealant between the first edge of the first floor covering and the first side of the vertical body portion.
[0066]
[0076] Example 11 includes the aircraft of any one of examples 1 to 10, wherein the first flooring material is a mat and the second flooring material is a carpet.
[0067]
[0077] Example 12 includes the aircraft of Example 11, wherein the second edge of the carpet is hemmed.
[0068]
[0078] Example 13 is a threshold for installation between two floorings, the threshold comprising a vertical body portion having an upper surface, a lower surface opposite the upper surface, a first side, and a second side opposite the first side. The second side has a recessed area at the lower surface to receive an edge of the flooring. The recessed area forms an overhang on the second side. The threshold also includes a sloped portion extending from the first side. The sloped portion decreases in thickness from the vertical body portion to a distal end of the sloped portion.
[0069]
[0079] Example 14 includes the threshold of Example 13, wherein the vertical body portion has a first edge between the top surface and the first side surface and a second edge between the top surface and the second side surface, and the top surface of the vertical body portion is curved between the first edge of the vertical body portion and the second edge of the vertical body portion.
[0070]
[0080] Example 15 includes the threshold of example 14, wherein the first edge of the vertical body portion is rounded and the second edge of the vertical body portion is rounded.
[0071]
[0081] Example 16 includes the threshold of any one of Examples 13 to 15, wherein the threshold is constructed of thermoplastic polyurethane (TPU).
[0072]
[0082] Example 17 includes the sill of any one of Examples 13-16, wherein the first side does not include an overhang.
[0073]
[0083] Example 18 is a method of installing a flooring and threshold in an aircraft, the method including adhering a first portion of a first flooring to a subfloor in the aircraft, and adhering the threshold to the subfloor adjacent a first edge of the first flooring. The threshold includes a vertical body portion having an upper surface, a lower surface opposite the upper surface, a first side, and a second side opposite the first side. The vertical body portion has a recessed area at the lower surface that extends into the second side, and a sloped portion extending from the first side that decreases in thickness from the vertical body portion to a distal end of the sloped portion. The method also includes adhering a second portion of the first flooring onto the sloped portion of the threshold, whereby the first edge of the first flooring is adjacent the first side of the vertical body portion. The method also includes adhering a second flooring to the subfloor and forcing the second edge of the second flooring into the recessed area of the threshold.
[0074]
[0084] Example 19 includes the method of example 18, further including adding a sealant between the first edge of the first flooring and the first side of the vertical portion of the sill.
[0075]
[0085] Example 20 includes the method of example 18 or 19, wherein the recessed area forms an overhang on the second side of the vertical body portion, the overhang being disposed above a portion of the second flooring.
[0076]
[0086] The following claims are incorporated into this detailed description by this reference. Although certain exemplary systems, apparatus, articles of manufacture, and methods have been disclosed herein, the scope of coverage of this patent application is not limited thereto. Rather, this patent application covers all systems, apparatus, articles of manufacture, and methods that fairly fall within the scope of the claims of this patent application.
Claims
1. A subfloor (302); a first floor covering (304) on said sub-floor (302); a second floor covering (306) on said sub-floor (302); and 1. An aircraft (100) comprising a sill (200) disposed at least partially between the first floor covering (304) and the second floor covering (306), The first floor covering (304) has a first edge (314); the second flooring (306) has a second edge (320); The threshold (200) is a vertical body portion (202) having an upper surface (206), a lower surface (208) opposite said upper surface (206), a first side surface (210), and a second side surface (212) opposite said first side surface (210), said vertical body portion (202) having a recessed area (214) at said lower surface (208) extending into said second side surface (212), said second edge (320) of said second flooring (306) extending into said recessed area (214); 1. An aircraft (100) comprising: a ramp (204) extending from the first side (210), the ramp (204) decreasing in thickness from the vertical body portion (202) to a distal end (224) of the ramp (204), the ramp (204) being disposed between a portion of the first floor covering (304) and the subfloor (302).
2. 2. The aircraft (100) of claim 1, wherein the recessed area (214) forms an overhang (215) on the second side (212), the overhang (215) having a width of less than 0.100 inches.
3. 2. The aircraft (100) of claim 1, wherein the sill (200) is constructed of thermoplastic polyurethane (TPU).
4. The aircraft (100) of claim 1, wherein the sill (200) is a monolithic structure.
5. 2. The aircraft (100) of claim 1, wherein the vertical body portion (202) has a first edge (216) between the upper surface (206) and the first side (210) and a second edge (218) between the upper surface (206) and the second side (212), and the upper surface (206) of the vertical body portion (202) is curved between the first edge (216) of the vertical body portion (202) and the second edge (218) of the vertical body portion (202).
6. 6. The aircraft (100) of claim 5, wherein the first edge (216) of the vertical body section (202) is rounded and the second edge (218) of the vertical body section (202) is rounded.
7. The aircraft (100) of claim 1, further comprising an adhesive layer (308) between the lower surface (226) of the sill (200) and the subfloor (302).
8. 8. The aircraft (100) of claim 7, wherein the adhesive layer (308) is a double-sided tape.
9. 2. The aircraft (100) of claim 1, further comprising an adhesive layer (322) between the first flooring (304) and an upper surface (220) of the ramp (204).
10. 2. The aircraft (100) of claim 1, further comprising a sealant (324) between the first edge (314) of the first floor material (304) and the first side (210) of the vertical body portion (202).
11. 2. The aircraft (100) of claim 1, wherein the first floor covering (304) is a mat and the second floor covering (306) is a carpet.
12. 12. The aircraft (100) of claim 11, wherein the second edge (320) of the carpet is hemmed.
13. A threshold (200) for installation between two floorings, a vertical body portion (202) having an upper surface (206), a lower surface (208) opposite said upper surface (206), a first side surface (210), and a second side surface (212) opposite said first side surface (210), said second side surface (212) having a recessed area (214) in said lower surface (208) for receiving an edge of a flooring material, said recessed area (214) forming an overhang (215) on said second side surface (212); A sill (200) comprising a ramp (204) extending from said first side (210), said ramp (204) decreasing in thickness from said vertical body portion (202) to a distal end (224) of said ramp (204).
14. 14. The threshold (200) of claim 13, wherein the vertical body portion (202) has a first edge (216) between the top surface (206) and the first side surface (210) and a second edge (218) between the top surface (206) and the second side surface (212), and the top surface (206) of the vertical body portion (202) is curved between the first edge (216) of the vertical body portion (202) and the second edge (218) of the vertical body portion (202).
15. 15. The threshold (200) of claim 14, wherein the first edge (216) of the vertical body portion (202) is rounded and the second edge (218) of the vertical body portion (202) is rounded.
16. The threshold (200) of claim 13, wherein the threshold (200) is constructed of thermoplastic polyurethane (TPU).
17. The sill (200) of claim 13, wherein the first side (210) does not include an overhang.
18. A method of installing flooring and thresholds (200) in an aircraft (100), comprising the steps of: adhering a first portion of a first flooring (304) to a subfloor (302) within the aircraft (100); adhering the threshold (200) to the sub-floor (302) adjacent a first edge (314) of the first flooring (304), the threshold (200) comprising: a vertical body portion (202) having an upper surface (206), a lower surface (208) opposite said upper surface (206), a first side surface (210), and a second side surface (212) opposite said first side surface (210), said vertical body portion (202) having a recessed area (214) in said lower surface (208) extending into said second side surface (212); bonding said sill (200) including a ramp (204) extending from said first side (210), said ramp (204) decreasing in thickness from said vertical body portion (202) to a distal end (224) of said ramp (204); adhering a second portion of the first flooring (304) onto the sloped portion (204) of the threshold (200) such that the first edge (314) of the first flooring (304) is adjacent to the first side (210) of the vertical body portion (202); and the method including adhering a second flooring (306) to the sub-floor (302) and forcing a second edge (320) of the second flooring (306) into the recessed area (214) of the threshold (200).
19. 20. The method of claim 18, further comprising adding a sealant (324) between the first edge (314) of the first flooring (304) and the first side (210) of the vertical body portion (202) of the threshold (200).
20. 20. The method of claim 18, wherein the recessed area (214) forms an overhang (215) on the second side (212) of the vertical body portion (202), the overhang (215) being disposed above a portion of the second floor material (306).