DISABLED AIRCRAFT TRANSPORT SYSTEMS
20240217673 ยท 2024-07-04
Inventors
Cpc classification
B64F1/225
PERFORMING OPERATIONS; TRANSPORTING
International classification
Abstract
A dolly with an inflatable airbag stack for placement beneath a portion of a disabled aircraft enables the aircraft to be raised and the subsequent transport of the aircraft without requiring cranes or heavy equipment. An adjustable height rigid support structure may be received by the dolly, the rigid support structure having an aircraft support platform that may be positioned on the top of the inflatable airbag stack such that as the airbag stack is raised, the aircraft support platform engages the disabled aircraft. The airbag stack may be deflated such that the weight of the aircraft is carried by the rigid support structure. The dolly's bed or another dolly in a recovery system may also receive a flat tire of a disabled aircraft. The dolly may receive a support platform extending between a pair of beams, the airbag stack seating on the platform.
Claims
1. A dolly system for lifting an aircraft from underneath the aircraft, comprising: a dolly comprising: a steel frame including a pair of side beams that are substantially parallel to each other and a platform extending between the pair of beams defining a lower bed region, and a plurality of castors attached to each of said pair of beams; the dolly system further comprising a pneumatic lifting system comprising an inflatable vertically erectable airbag stack, the erectable airbag stack comprising a plurality of joined and vertically stacked airbags, the airbag stack seated above or in the lower bed region, the stack of airbags comprising a plurality of airbags stacked one atop another, each of the plurality of airbags configured to transition from a compact deflated configuration to an inflated raised configuration.
2. The dolly system of claim 1, further comprising a platform removably placeable on the dolly, the platform having an upper plate portion that spans between the pair of side beams and span most of a forward backward length of the pair of beams, the platform further comprising a plurality of legs that extend downwardly from the upper plate portion to seat on the lower bed region, and wherein the plurality of joined and vertically stacked airbags sits on an upper surface of the upper plate portion.
3. The dolly system of claim 2, wherein the platform has a pair of lateral margins positioned above the pair of side beams, the platform having a plurality of cutouts at each of the pair of lateral margins and further has a forward margin and rearward margin, the platform having a respective downwardly extending lip at each of the forward and rearward margins, and wherein the platform seats on each of the pair of side beams and wherein each of the plurality of legs are displaced inwardly from the lateral margins.
4. The dolly system of claim 1, wherein the plurality of castors attached to each of said pair of beams comprise five castors on each beam, each castor comprising two wheels, and wherein the plurality of castors define a rectangular footprint on a surface below the dolly of at least about 50 inches by 55 inches.
5. The dolly system of claim 1, further comprising a plurality of strap retainers at the dolly for receiving a plurality of airbag retaining straps, and wherein the inflatable vertically erectable airbag stack comprises a plurality of straps extending from an upper portion of the vertically erectable airbag stack when the airbag stack is erected.
6-7. (canceled)
8. The dolly system of claim 5, wherein the plurality of straps are anchored to a plurality of support members that extend laterally outward from the pair of side beams.
9. The dolly system of claim 1, wherein each of the pair of beams comprises a plurality of receiving brackets for accepting an adjustable height rigid support structure, and the dolly further comprises an adjustable height rigid support structure.
10. The dolly system of claim 9, wherein the adjustable height rigid support structure further comprises a support platform for the top of the rigid support structure.
11. The dolly system of claim 10, wherein the support platform is attachable and detachable to a left and a right side of the rigid support structure and the support platform has a curvature for receiving a fuselage of the aircraft.
12-18. (canceled)
19. A method of clearing a disabled aircraft from a runway comprising: providing the dolly system of claim 1; positioning the dolly with each of the individual airbags in a deflated configuration beneath a downward facing portion of the aircraft; raising the downward facing portion of the aircraft by inflating at least one of the individual airbags; continuing to inflate the stack of airbags until the downward facing portion is at the desired height; towing the aircraft with attached dolly from the runway.
20-35. (canceled)
36. A system for raising and towing a disabled aircraft stored together at an airport for rapid deployment during an emergency, the system comprising: a first aircraft dolly having a tow bar; vertically erectable airbag stack on the first aircraft dolly; a compressor; an air hose for connecting between the compressor and the airbag stack; and an adjustable height rigid support structure attachable to the first aircraft dolly.
37. The system of claim 36, wherein the adjustable height rigid support structure comprises at least four telescoping legs, the first aircraft dolly being configured to receive a lower portion of each of the at least four telescoping legs; and an aircraft support platform for the top of each of the at least four legs.
38. (canceled)
39. The system of claim 37, wherein the aircraft support platform is arcuate for conformingly receiving a fuselage of a disabled aircraft.
40. (canceled)
41. A kit for moving a disabled aircraft, the kit comprising: a plurality of dollies, each dolly having a U-shaped steel framework and a lowered bed platform supported by the U-shaped framework; a plurality of towbars; a pneumatic lifting system comprising an air bag stack placeable on one of the plurality of dollies, a compressor; and connecting hose; and strapping for attachment to the disabled aircraft.
42. The kit of claim 41, further comprising a beam bridging support platform for placement on the beams of the one of the plurality of dollies, the beam bridging support platform having legs for engaging the lowered bed platform.
43. The kit of claim 42, wherein the airbag stack has a footprint of about 48 inches by 48 inches, plus or minus two inches, and seats upon the bean bridging support platform.
44. (canceled)
45. The kit of claim 41, wherein a forward portion of the frame of the one of the plurality of dollies has a winch and battery mounted thereon.
46. The kit of claim 41, further comprising a lifting plate that seats on top of the airbag stack.
47. The kit of claim 41, further comprising an adjustable height rigid support structure attachable to the one of the plurality of dollies, adjustable height rigid support structure that extends upwardly about the airbag stack.
48-49. (canceled)
50. The kit of claim 41, further comprising means for stabilizing the airbag stack when it is in an inflated state supporting the aircraft.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
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DETAILED DESCRIPTION
[0061] Referring to
[0062] The frame 101 of dolly 100 additionally includes a plurality of angled brackets or gussets 114 extending on opposite lateral sides of platform 106 to support platform 106. In embodiments, gussets 114 may provide support for the support plates making up platform 106. Each beam 102, 104 includes a plurality of forwardly-rearwardly extending elongate wall portions defining a C-shape in cross section and including a substantially vertical innermost wall portion 120 extending upwardly from platform 106, angled wall portion 122 extending from portion 120 over to top horizontal wall portion 124, and outermost wall portion 125. Wall portions 122 can be provided with apertures for receiving adjustable stops. End plates 126 substantially close off the ends of beams 102, 104. Beams 102,104 are generally mirror images of one another.
[0063] Dolly 100 includes a plurality of wheels 130 or casters disposed at each side of the platform for rolling dolly 100 on an underlying surface. Angled brackets 114 are disposed at each side of platform 106 between wheels 130. Outer portion 125 includes slots for accommodating wheel flanges 132 for attaching wheels 130 to beams 102, 104. As shown, dolly 100 includes eight wheels, four on each side. Dolly 100 may include more or fewer wheels as necessary. Increasing the number of wheels permits dolly 100 to be used with heavier aircraft. the wheels are generally known as castors and can be swivel castors, about a vertical axis, or non-swiveling, that is fixed castors. Typically, on each side one or two castors with swivel and the rest will be fixed.
[0064] Dolly 100 may have forklift loops 144, 146 added to the beams 102, 104. A winch 110 is illustrated on the winch platform positioned at the same plane as the top surfaces of the beams. The weight carrying capacity of 75,000 lbs. is facilitated in part by the thick steel, double walled aircraft wheel receiving platform, and five castors on each beam. Dolly 100 can be removed from beneath the aircraft tire by removing the winch rigging and the front adjustable stop, then simply rolling the airplane back onto the ground. Alternatively, the aircraft can be jacked up to allow dolly 100 to be rolled out from under the tire.
[0065] Dolly 100 may have post receivers 146, 148 added to the beams 102, 104. As shown, two post receivers are located on each of the two beams, providing four total post receivers. Post receivers 146, 148 may include apertures for receiving fasteners. Additional post receivers may be added, permitting for the use of additional posts or support legs.
[0066] Referring to
[0067] Lower leg 206 has a bottom portion 208 and a top portion 206. Bottom portion 208 is configured to interface with post receivers 146, 148. Bottom portion 208 may fit within post receiver 146, 148 or, conversely, post receiver 146, 148 may fit within bottom portion 208. Once bottom portion 208 and post receiver 148 are aligned, fastener 220 maybe be slid through the corresponding structures, securing the lower leg 206 to dolly 100. Upper leg 204 is configured similarly to lower leg 206, having a first column of apertures 201 along a first wall and a corresponding column of apertures along an opposing wall. Upper leg 204 may have a smaller or a larger width or diameter than bottom leg 206 such that upper leg 204 may be received within the cavity of bottom 206, or bottom leg 206 may be received in a central cavity of upper leg 204. Once positioned one within the other, upper and lower legs 204, 206 may be fixed to one another with fastener 220. Accordingly, support post 202 is a telescoping column with a variable height. In embodiments, the legs may be steel, metal, metal alloys, extruded, or the like.
[0068] The rigid support assembly may be used to support a damaged aircraft while it is towed from a runway or otherwise maneuvered for improved stability. An upward facing surface 304 of the support platform 302 may have an additional padding layer so as not to damage the aircraft. Padding layer may also be somewhat compressible or malleable to further conform to the contour of the aircraft surface being supported. For example, padding layer may be a high-density foam. The padding may be integrated with the plate or separate. In embodiments, the legs of the rigid structure may be tubular. In embodiments, a downward facing surface of the support platform 301 may include structure to interface with the tubular legs. For example, platform may have sockets, brackets, or projections 306 that conform to the tubular upper legs 204, such that the protrusions 306 fit within an opening of the upper leg 204 or surround an end of the leg 204. Protrusions 306 may further have apertures 308 configured to receive fasteners 220 to secure support platform 301 to legs 202. Other rigid support structure may be utilized as well.
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[0071] Embodiments of the invention are sturdy and durable, being constructed for example of 5/16 inch or ? inch or greater steel, welded solidly together. In the case of pivoting wheels or casters, it can be desirable to ensure that all casters disposed at the corners of the dolly, at least, are pointed in the direction of the tow before towing begins, to avoid binding or undue stress on the casters. It also can be desirable for enhanced stability to leave the towbar attached to the dolly during winching or other movement of the aircraft tire onto the dolly. It will also be appreciated that during such winching or other movement, the aircraft tire may roll with respect to the dolly, the dolly may roll with respect to the tire, or both movements may occur. In any case, relative movement between the dolly and the aircraft tire occurs to move the aircraft tire into the channel and secure the tire on the platform of the dolly, for towing.
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[0074] In embodiments, each individual airbag may be associated with two retaining straps 810, 812. Each strap 810, 812 may have an end 814, 816 configured to attach to one of the forklift brackets 142, 144. As such, the strap may have a first end secured to a first bracket on a first beam, extend over an upward facing surface of the individual airbag, and have a second end secured to a bracket on the second beam. In embodiments, each individual airbag may be associated with four straps, where each retaining strap has a first end secured to a bracket on a dolly beam and an opposite end affixed to the individual airbag. In embodiments, the second end of the retaining strap may be affixed to a circumferential strap 818 that surrounds an upper portion of the individual airbag. In embodiments, the circumferential strap 818 may surround both the upper portion of a first airbag 806.1 and the lower portion of an adjacent airbag 806.2, thereby offering some additional structural support to the system. In embodiments, a tarp, webbing, sheet, or similar covering may cover the upward facing surface of the individual airbag, and the second end of the strap may be affixed to the tarp. It will be understood that more or fewer straps may be incorporated into the strap system, and more brackets may be added to the dolly beams for additional mounting points. Straps may have any combination of fixed or removable connection points. For example, straps may use hooks, zippers, carabiners, tie downs, hook and loop, or the like. In embodiments, straps may be permanently affixed to the airbags, tarps, other straps, or the like by stitching, glue, or the like. In embodiments straps may be woven, fabric, rope, or the like
[0075] Each restraining strap associated with the same individual airbag may be part of a set, and each strap in the set may have the same length. Straps in different sets, that is, straps associated with different individual airbags in a system, may have different lengths. Accordingly, shorter straps may be associated with individual airbags at or near the bottom of a stack of airbags, whereas longer straps may be associated with individual airbags at or near the top of a stack of airbags. As such each retaining strap is taught when the airbag stack is fully inflated, creating a system that is straight and not prone to leaning or tipping. Maintaining a straight airbag stack is important for proper positioning and lifting of the aircraft. Systems lacking any such structure are prone to tiling or slipping and may not effectively lift an aircraft. Internal webs in the bags may help stabilize the airbag column. See U.S. Pat. Pub. No. US 20100117039, incorporated by reference herein for all purposes.
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[0077] In some embodiments, as depicted in
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[0084] The following additional references are hereby incorporated by reference herein in their entirety, except for express definitions and patent claims contained therein: U.S. Pat. No. 1,248,896 to Olson; U.S. Pat. No. 2,362,981 to Baum; U.S. Pat. No. 2,392,409 to Ray; U.S. Pat. No. 2,608,312 to Day; U.S. Pat. No. 3,583,723 to Nowell, et al.; U.S. Pat. No. 3,586,187 to Wright; U.S. Pat. No. 3,598,259 to Wright; U.S. Pat. No. 3,720,422 to Nelson; U.S. Pat. No. 3,946,886 to Robinson et al.; U.S. Pat. No. 4,690,605 to Coccaro; U.S. Pat. No. 4,854,803 to Coccaro; U.S. Pat. No. 5,071,151 to Irwin; U.S. Pat. No. 6,286,813 to Coccaro; U.S. Pat. No. 7,070,167 to Bacon; U.S. Pat. No. 7,097,406 to Gang; U.S. Pat. No. 8,475,108 to Hamman; U.S. Patent Application Publication No. 2014/0037409 to Winters; and U.S. Pat. App. Pub. No. 2018/0273360 to Nasrin. See also Towbar Model TY-TB-FTD, The Brackett Aircraft Company, Inc., Kingman, AZ, USA; and NFE-4 Aircraft Tug, AIRTUG?, Avon, OH, USA.
[0085] Any incorporation by reference of documents above is limited such that no subject matter is incorporated that is contrary to the explicit disclosure herein. Any incorporation by reference of documents above is further limited such that no claims included in the documents are incorporated by reference herein. Any incorporation by reference of documents above is yet further limited such that any definitions provided in the documents are not incorporated by reference herein unless expressly included herein.
[0086] The above disclosure is related to the detailed technical contents and inventive features thereof. People skilled in this field may proceed with a variety of modifications and replacements based on the disclosures and suggestions of the invention as described without departing from the characteristics thereof. For example, although a plurality of adjustable stops as shown are useable with each of the embodiments, it is additionally or alternatively contemplated to leave the aircraft tightly secured in place with the winch and strap during towing. Although many such modifications and replacements are not fully disclosed in the above description, they have substantially been covered by the spirit and technical theory of the subject invention.
[0087] References to embodiment(s), disclosure, present disclosure, embodiment(s) of the disclosure, disclosed embodiment(s), and the like contained herein refer to the specification (text, including the claims, and figures) of this patent application that are not admitted prior art.
[0088] For purposes of interpreting the claims, it is expressly intended that the provisions of 35 U.S.C. 112(f) are not to be invoked unless the specific terms means for or step for are recited in the respective claim.