Patent Grant
10294077
This present invention relates generally to a device for transporting materials up a folding overhead stairway or ladder. More particularly, the device relates to a transport device with a powered or manual winch to enable the movement of the materials in a safe and efficient manner.
Background
The Folding Attic Stairway Transport System relates generally to material transport and lifting system which can be used in conjunction with a folding attic stairway or ladder to elevate materials from the garage or lower floor to the above attic floor. Extreme difficulty is often encountered in lifting heavy objects to the attic floor. Often there is material in ones hands to cause unbalance. Unsteady feet on the steps are exacerbated by the extra weight of the material transported. There may even be a need to use a second person to handle the excess weight or steady the material container being transported to and from the attic. Often back, arms and leg muscles end up strained. Or, the material is dropped and damaged. Or even worse, a person falls and is hurt in the process of moving material to and from the attic.
Problem
There is a need for an apparatus that can easily be attached to a folding stairway and used to lift loads to the surface of the attic floor. The apparatus should be capable of operating and functioning with a single person controlling the material to and from the attic floor. Accordingly, there is a need for the Folding Attic Stairway Transport System with powered or manual means such as a winch to safely and efficiently move materials up and down the stairway. The material transport can be used in conjunction with a folding stairway to lift material from a first position to a higher position. There is a further need for an apparatus that can be easily installed to fit the width of a particular stairway—existing or new. The apparatus should be capable of being folded into a compact form along with the typical folding stairway systems.
Prior Art
As far as known there are no other devices or process that perform the function of the Folding Attic Stairway Transport System. A U.S. Pat. No. 8,002,512 issued to Blehm (2011) and entitled “Material Transport” shows a material transport system and method of use. The system includes a base assembly having an adjustable width, a material support platform attached to the base assembly, the platform supported angularly above the base by support tubes attached to the base assembly, guides aligned along the length of the base assembly, the rails removably attached to the underside of the base assembly, and a left pair and a right pair of wheels axially mounted between each rail guide pair. It is portable and designed for extension ladders and the like. It does not teach or anticipate MacDonald's Folding Attic Stairway Transport System. Another U.S. Pat. No. 8,851,238 was issued to Byers in 2014 and entitled “Lifting System”. “Optical coherence tomography systems and methods” Byers demonstrated an apparatus for raising and lowering objects. In accordance with some embodiments, a winch motor is adapted to rotate a winch member in opposing first and second directions to wrap/unwrap a portion of a cable on/from the winch member to raise and lower a lifting platform assembly, respectively. A tension detection switch assembly includes an on/off switch connected to the winch motor and a biasing member which exerts a bias force upon the winch member to nominally deflect the winch member to a first position which sets the switch to deactivate the winch motor in an absence of tension in the cable from the lifting platform assembly. This shows a vertical cable lifted platform unlike MacDonald's installation to the folding stairway.
Still another U.S. Pat. No. 8,579,081 issued to Richey et al in 2013 and entitled “Remote controlled overhead ladder system” demonstrated generally features of a remotely operated motor to lower and raise a set of folding stairs. It was silent as to any material transport or platform devices and was unlike MacDonald's Folding Attic Stairway Transport System. A typical folding stairway is shown in U.S. Pat. No. 5,050,706 issued to Cole et al in 1991 entitled “Ceiling Ladder”. It shows and teaches a folding ladder but has no mention of the material transport system invented by MacDonald.
A U.S. Pat. No. 6,533,070 by Elrod was issued in 2003 and was entitled “Roof Buddy”. It shows a raisable and lowerable platforms for use with ladders that are laid against exterior and interior walls, and against other inclined surfaces such as pitched roof surfaces. Two or more ladders can each include the platforms which are controlled by motors to raise and lower in unison. The platforms can be attached by rollers about exterior sides of the ladders or on the interior sides of the ladders, as needed. Single, two, or more ladder applications can include platforms being expandable to have enlarged surfaces. A longitudinal member such as a board, deck, etc., can also be positioned on the platform(s) so it can be used as a raisable and lowerable scaffolding system.
The Folding Attic Stairway Transport System, called the LADCAD™, is a developed transport system, which uses existing folding attic stairway of various widths and allows one person to safely store and retrieve items in/from their attic. The LADCAD™ transport system maintains the attic stairway folding capability and can be added at initial new installation or years later as a retrofit. The embodiment is a transport system that includes a base assembly transport device with runners that will rest on the attic stairway. The base assembly transport device is suspended by a cable that circles around pulleys attached to the attic floor and exits through the attic stairway cover and is attached to a winch. Alternatively, the winch can be located in the attic. The motion of moving the device up and down the stairway is operated by a manual or automated winch. Guides are attached to two sections of the attic stairway rails to control alignment as the device leaves the ceiling opening and returns to the stairway and down the stairway. One skilled in the art of stairway and attic devices notes that the guides are strategically placed on the stairway rails in order for the stairway to continue to fold into the ceiling, as expected.
Advantages and Benefits for the Folding Attic Stairway Transport System include:
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the device that is preferred. The drawings together with the summary description given above and a detailed description given below serve to explain the principles of the Folding Attic Stairway Transport System. It is understood, however, that the Folding Attic Stairway Transport System is not limited to only the precise arrangements and instrumentalities shown.
The following list refers to the drawings:
This present invention relates generally to a device for transporting materials up a folding overhead stairway or ladder. More particularly, the device relates to a transport device with a powered or manual winch to enable the movement of the materials in a safe and efficient manner.
There are shown in
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate a preferred embodiment and examples of uses. The preferred embodiment is a Transport System for a folding attic stairway comprised of (a) a base assembly made of durable materials with a platform, an end, and a pair of runners; (b) a guiding system for the platform comprised of a lower section pair of guide rails, an upper section pair of guide rails, runner wear pads/strip or angle, and a means for connecting each of the upper and lower section pair of guide rails to a stile of the stairway whereby the bottom surface of the runners of the platform slide contiguously along the upper and lower section pair of guide rails; (c) a cable system comprised of a cable with two ends, a means to connect one end of the cable to the to the platform, a means for connecting the opposite end of the cable to a winch device, a cable wear strip/angle cable wear strip/angle, and runner wear pads/strip or angle; and (d) the winch device wherein the transport device moves up and down the extended folding stairway; and wherein the folding stairway maintains its capability and use when the transport device is resting on the attic floor. An alternative embodiment is the system wherein the winch is located in the attic and the motion of moving the platform assembly is by means of a powered winch. Another alternative embodiment is the system wherein the cable system is further comprised of a pulley system with a number of pulleys configured such that the cable encircles around pulleys and guides the cable to the location of the winch.
The details mentioned here are exemplary and not limiting. Other specific components and manners specific to describing the Folding Attic Stairway Transport System can be added as a person having ordinary skill in the field of folding stairways for attics and the like.
The details mentioned anticipate various material options and alternative embodiments. The transport device 10 for a folding attic stairway 70 can be made of a durable material such as wood, wood substitute, pressed wood, metals like aluminum, steel, steel alloys, etc., durable plastics, and composite materials or the like. The cable 13 can be made of various stranded metals, high tensile strength metals or composite materials or high strength plastics, strong rope, or the like. The winch 16 anticipates a manual crank, a mechanically assisted ratchet, an electrical motor, a hydraulic powered system, a pneumatic powered system, or other means for providing power to move the cable 13. The means for attaching and securing 37, 85 anticipate a secure fastening means—removable or permanent—matched to the materials used. Adhesives, threaded bolts/nuts, threaded screws, nails, pins and heavy tacks for wood; welding, brazing or forming for metals, and adhesives or molding process for composites and plastics. The cable 13 connection point 17 anticipates a means 91 for securing and connecting the ends of the cable 13 such as eyelets and bolts; a single shank ball and washer; and clamps and thimbles or the like.
The details mentioned here are exemplary and not limiting. Other specific processes, methods, and manners specific to this Folding Attic Stairway Transport System can be added to by a person skilled in the art of folding stairways for attics and other access and material transport methods and apparatuses.
The new application is for the Folding Attic Stairway Transport System called the LADCAD™. The preferred embodiment is a Transport System for a folding attic stairway comprised of (a) a base assembly made of durable materials with a platform, an end, and a pair of runners; (b) a guiding system for the platform comprised of a lower section pair of guide rails, an upper section pair of guide rails, runner wear pads/strip or angle, and a means for connecting each of the upper and lower section pair of guide rails to a stile of the stairway whereby the bottom surface of the runners of the platform slide contiguously along the upper and lower section pair of guide rails; (c) a cable system comprised of a cable with two ends, a means to connect one end of the cable to the to the platform, a means for connecting the opposite end of the cable to a winch device, a cable wear strip/angle cable wear strip/angle, and runner wear pads/strip or angle; and (d) the winch device wherein the transport device moves up and down the extended folding stairway; and wherein the folding stairway maintains its capability and use when the transport device is resting on the attic floor. An alternative embodiment is the system wherein the winch is located in the attic and the motion of moving the platform assembly is by means of a powered winch. Another alternative embodiment is the system wherein the cable system is further comprised of a pulley system with a number of pulleys configured such that the cable encircles around pulleys and guides the cable to the location of the winch.
In operation, a person places load on transport device 10 while it is in its lower position as shown in
With this description it should be understood that the Folding Attic Stairway Transport System is not to be limited to only the disclosed embodiment of product. The system called the LADCAD™ is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the description.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which these inventions belong. Although any methods and materials similar or equivalent to those described herein can also be used in the practice or testing of the present inventions, the preferred methods and materials are now described. All patents and publications mentioned herein, including those cited in the background of the application, are hereby incorporated by reference to disclose and describe the methods and/or materials in connection with which the publications are cited.
The publications discussed herein are provided solely for their disclosure prior to the filing date of the present application. Nothing herein is to be construed as an admission that the present inventions are not entitled to antedate such publication by virtue of prior invention. Further, the dates of publication provided may be different from the actual publication dates which may need to be independently confirmed.
Other embodiments of the invention are possible. Although the description above contains much specificity, these should not be construed as limiting the scope of the invention, but as merely providing illustrations of some of the presently preferred embodiments of this invention. It is also contemplated that various combinations or sub-combinations of the specific features and aspects of the embodiments can be made and still fall within the scope of the inventions. It should be understood that various features and aspects of the disclosed embodiments can be combined with or substituted for one another in order to form varying modes of the disclosed inventions. Thus, it is intended that the scope of at least some of the present inventions herein disclosed should not be limited by the particular disclosed embodiments described above.
Thus the scope of this invention should be determined by the appended claims and their legal equivalents. Therefore, it will be appreciated that the scope of the present invention fully encompasses other embodiments which may become obvious to those skilled in the art and that the scope of the present invention is accordingly to be limited by nothing other than the appended claims, in which reference to an element in the singular is not intended to mean “one and only one” unless explicitly so stated, but rather “one or more.” All structural, chemical, and functional equivalents to the elements of the above-described preferred embodiment that are known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the present claims. Moreover, it is not necessary for a device or method to address each and every problem sought to be solved by the present invention for it to be encompassed by the present claims. Furthermore, no element, component, or method step in the present disclosure is intended to be dedicated to the public regardless of whether the element, component, or method step is explicitly recited in the claims.
The terms recited in the claims should be given their ordinary and customary meaning as determined by reference to relevant entries (e.g., definition of “plane” as a carpenter's tool would not be relevant to the use of the term “plane” when used to refer to an airplane, etc.) in dictionaries (e.g., widely used general reference dictionaries and/or relevant technical dictionaries), commonly understood meanings by those in the art, etc., with the understanding that the broadest meaning imparted by any one or combination of these sources should be given to the claim terms (e.g., two or more relevant dictionary entries should be combined to provide the broadest meaning of the combination of entries, etc.) subject only to the following exceptions: (a) if a term is used herein in a manner more expansive than its ordinary and customary meaning, the term should be given its ordinary and customary meaning plus the additional expansive meaning, or (b) if a term has been explicitly defined to have a different meaning by reciting the term followed by the phrase “as used herein shall mean” or similar language (e.g., “herein this term means,” “as defined herein,” “for the purposes of this disclosure [the term] shall mean,” etc.). References to specific examples, use of “i.e.,” use of the word “invention,” etc., are not meant to invoke exception (b) or otherwise restrict the scope of the recited claim terms. Other than situations where exception (b) applies, nothing contained herein should be considered a disclaimer or disavowal of claim scope. Accordingly, the subject matter recited in the claims is not coextensive with and should not be interpreted to be coextensive with any particular embodiment, feature, or combination of features shown herein. This is true even if only a single embodiment of the particular feature or combination of features is illustrated and described herein. Thus, the appended claims should be read to be given their broadest interpretation in view of the prior art and the ordinary meaning of the claim terms.
As used herein, spatial or directional terms, such as “left,” “right,” “front,” “back,” and the like, relate to the subject matter as it is shown in the drawing FIGS. However, it is to be understood that the subject matter described herein may assume various alternative orientations and, accordingly, such terms are not to be considered as limiting. Furthermore, as used herein (i.e., in the claims and the specification), articles such as “the,” “a,” and “an” can connote the singular or plural. Also, as used herein, the word “or” when used without a preceding “either” (or other similar language indicating that “or” is unequivocally meant to be exclusive—e.g., only one of x or y, etc.) shall be interpreted to be inclusive (e.g., “x or y” means one or both x or y). Likewise, as used herein, the term “and/or” shall also be interpreted to be inclusive (e.g., “x and/or y” means one or both x or y). In situations where “and/or” or “or” are used as a conjunction for a group of three or more items, the group should be interpreted to include one item alone, all of the items together, or any combination or number of the items. Moreover, terms used in the specification and claims such as have, having, include, and including should be construed to be synonymous with the terms comprise and comprising.
Unless otherwise indicated, all numbers or expressions, such as those expressing dimensions, physical characteristics, etc. used in the specification (other than the claims) are understood as modified in all instances by the term “approximately.” At the very least, and not as an attempt to limit the application of the doctrine of equivalents to the claims, each numerical parameter recited in the specification or claims which is modified by the term “approximately” should at least be construed in light of the number of recited significant digits and by applying ordinary rounding techniques.
This application claims the benefit of United States Provisional Patent Application with Ser. No. 62/123,958 filed Dec. 5, 2014 by Tena MacDonald and John MacDonald and entitled “Folding Attic Stairway Transport System”.
| Number | Name | Date | Kind |
|---|---|---|---|
| 976240 | Winkler | Nov 1910 | A |
| 2394148 | Campbell | Feb 1946 | A |
| 2499791 | Spencer | Mar 1950 | A |
| 2588959 | Campbell | Mar 1952 | A |
| 3115211 | Ostrander, Jr. | Dec 1963 | A |
| 3428145 | Lyon | Feb 1969 | A |
| 3666054 | Ellings | May 1972 | A |
| 3859925 | Hartz | Jan 1975 | A |
| 3891062 | Geneste | Jun 1975 | A |
| 4183423 | Lewis | Jan 1980 | A |
| 4262773 | Basham | Apr 1981 | A |
| 4550807 | Ohlgren | Nov 1985 | A |
| 4793437 | Hanthorn | Dec 1988 | A |
| 4875547 | Hanthorn | Oct 1989 | A |
| 5050706 | Cole et al. | Sep 1991 | A |
| 5311970 | Basta | May 1994 | A |
| 5626208 | Sprague | May 1997 | A |
| 5911287 | Campbell | Jun 1999 | A |
| 6244381 | Ruble | Jun 2001 | B1 |
| 6533070 | Elrod | Mar 2003 | B1 |
| 6739430 | Hill | May 2004 | B2 |
| 7424932 | Murphy | Sep 2008 | B1 |
| 8002512 | Blehm | Aug 2011 | B1 |
| 8579081 | Richey | Nov 2013 | B2 |
| 8689937 | Grado | Apr 2014 | B2 |
| 8851238 | Byers | Oct 2014 | B2 |
| 9217285 | Connors | Dec 2015 | B2 |
| 9856697 | Reyes | Jan 2018 | B2 |
| 20070107990 | Schwertner | May 2007 | A1 |
| 20070269303 | Quare | Nov 2007 | A1 |
| 20080060874 | Lair | Mar 2008 | A1 |
| 20080093176 | Rosenthal | Apr 2008 | A1 |
| 20150273250 | Bina | Oct 2015 | A1 |
| 20180086601 | Okonski | Mar 2018 | A1 |
| 20180100351 | Bright | Apr 2018 | A1 |
| Number | Date | Country | |
|---|---|---|---|
| 20160159613 A1 | Jun 2016 | US |
| Number | Date | Country | |
|---|---|---|---|
| 62123958 | Dec 2014 | US |
