The present invention relates to a portable stair climbing mechanism for the conventional trolley. More particularly, the present invention may assist the users to carry the trolley smoothly and steadily along the stairways.
BACKGROUND ART
[0002] Despite the fact that wheeled luggage tends to overcome the dilemma of carrying luggage on flat surfaces with little to no discontinuities, it also had to be picked up while traversing stairwells. With passing time, more and more innovations have emerged that allows luggage to be pulled up and down through staircases using wheels and electronic motors, among other things. While all of these innovations have certain drawbacks, such as mechanisms that operated on electricity requiring support, and devices that had to be connected to the trolley in such a manner that they had to be taken around all the time. Motivated by these facts, the present aim of the invention is to incorporate a technology that is user-friendly, light-weighted, comfortable, compact, and mechanically driven mechanism. The present invention relates to conventional trolley with wheels to assist them in climbing up or down the staircase. More specifically, the present invention relates to a trolley with a portable mechanism mounted on the back of the trolley to assist in pulling it up or down at any staircase. The mechanism also has a locking device through which height adjustment can be done according to the size of the staircase.
[0003] US patent no. US6938740 to Cheryl M Gandy discloses a suitcase with stair roller and brakes. Cheryl's suitcase comprised of an internal chamber with two panels, which facilitate a rolling movement of the suitcase across the stairs of flight with braking system. This invention includes a new design of suitcase and but limited to the stairs of flight. However, the housing mechanism will not be suitable for the conventional trolley and public staircase.
[0004] US patent no. US5575362 to Ming-Shi Chou discloses a wheeled suitcase with rectangular body. Chou placed the rollers at the bottom of the suitcase. These rollers provide smooth movement only on the flat surface. However, chou's

invention is not suitable for the public or flight staircase because at the same instance, it cannot engage two successive steps. Hence, it will be difficult to carry the wheeled suitcase on staircase.
[0005] US patent no. US6041900 to Bernard D. Sadow et al. discloses towable article of luggage. Sadow's placed the wheels in the bottom as well as front face of the luggage to provide improved stability on flat surface and enhanced weight carry-ability. However, this arrangement of wheels does not offer a successive engagement to navigate multiple stairs at one time.
[0006] Indian patent no. IN2014DE00789A to Poddar Shashi and Sharma Dewakar discloses to manually controlled stair climbing aid for luggage. This innovation enables the suitcase to be dragged up or down through the stairs of airplane without having to be held or removed. The invention is more specifically concerned with the judicious organization of a multitude of wheels in order to stop a jerky motion. The telescopic handle is equipped with a spring-loaded internal gear locking mechanism that allows it to be positioned at different angles, while the slider assembly prevents the luggage from moving freely during descent and ascent. This innovation however is not suitable for public stairways with variable height and width.
[0007] US patent no. US 20110127732A1 to Kevin et al. discloses to star climbing wheel with multiple configurations. The stair climbing wheel is made up of a rolling wheel and a number of transportable protrusions that allow it to ascend the stairs. The stair climbing wheel acts as a conventional revolving wheel when retracted. These stair climbing wheels can be fitted to a wide range of cars, from hand trucks, wheelchairs, and personal transports, allowing them to climb the stairs. The stair climbing wheel aid an advantage in relation to typical stair sizes. However, the invention also is not suitable for the conventional trolleys.
[0008] Most of the invention above, tried to develop a new mechanism with different design in the trolley or suitcase having limited accuracy. Thus, there is hardly any mechanism which is proved to be entirely satisfactory in case of conventional trolley. Continuous efforts are going to develop robust portable

mechanism for carrying conventional trolley in stairways which can provide better precision in performance, low cost, and ease in operation.
[0009] Therefore, an improved portable mechanism for conventional trolley is required for dragging the trolley on stairways.
OBJECTS OF THE INVENTION
[0010] The main objective of the present invention is to provide a portable stair climbing mechanism for the conventional trolley.
[0011] Another important object of the present invention is to provide a portable stair climbing mechanism for the conventional trolley, wherein the mechanism is easy to manufacture.
[0012] The further main object of the present invention is to provide a portable stair climbing mechanism for the conventional trolley, wherein the mechanism is economical.
[0013] The one more object of the present invention is to provide a portable stair climbing mechanism for the conventional trolley, wherein the mechanism provides a jerk free movement during the climbing up or down over the staircase.
[0014] Yet another important object of the present invention is to provide a portable stair climbing mechanism for the conventional trolley, wherein the mechanism provides a height adjustment system with minimal effort according to the stair dimension for the better stability.
[0015] The furthermore object of the present invention is to provide a portable stair climbing mechanism for the conventional trolley, wherein the mechanism provides a good posture position during the movement over the staircase.
SUMMARY OF THE INVENTION
[0016] The present invention proceeds from the conventional wheeled trolley available in the market including extendable handle for towing over the ground. Present invention provides a portable mechanism for conventional trolley to climb up or down both across the staircase. The portable mechanism includes a

suspension for jerk free movement, a channel beam to mount wheels with gradually increasing diameter to provide better posture position while climbing up or down, and a locking mechanism for height adjustment according to staircase dimension.
[0017] The wheel of the mechanism is arranged symmetrically on both the side of channel beam, with their axes being parallel to each other. The size of the wheel diameter is calculated from the length of the beam and the size has been selected according to its availability in the market. The bearing wheels type roller are used for better gripping and smooth movement. In addition to the bearing wheels with roller, the crucial embodiment of the present invention is the suspension and the locking mechanism. To adjust the diagonal length of the staircase, the locking mechanism is much required to adjust the height of the portable mechanism. Accordingly, locking mechanism I (upper half) and locking mechanism II (lower half) comprises of holes at appropriate distances. The holes of the locking mechanism can be engaged according to the dimension of stairs with the help of bolt or key. A suspension is attached with the locking mechanism and channel beam for the jerk free movement. A steel frame is attached alongside of the locking mechanism and the channel beam to support the trolley. The frame is attached to the trolley with the help of Velcro belt.
BRIEF DESCRIPTION OF DRAWINGS
[0018] So that the manner in which the above-recited features of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may have been referred by embodiments, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only typical embodiments of this invention and are therefore not to be considered limiting of its scope, for the invention may admit to other equally effective embodiments.
[0019] These and other features, benefits, and advantages of the present invention will become apparent by reference to the following text figure, with like reference numbers referring to like structures across the views, wherein:

[0020] Figure (1) shows a schematic representation of a portable stair climbing mechanism for the conventional trolley in accordance with the present invention.
[0021] Figure (2) shows various view of a portable stair climbing mechanism for the conventional trolley in accordance with the present invention.
[0022] Figure (3) illustrates description of the frame which is used to support the trolley in accordance with the present invention.
[0023] Figure (4) shows details of suspension which is further connected with the channel beam in accordance with the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0024] While the present invention is described herein by way of example using embodiments and illustrative drawings, those skilled in the art will recognize that the invention is not limited to the embodiments of drawing or drawings described and are not intended to represent the scale of the various components. Further, some components that may form a part of the invention may not be illustrated in certain figures, for ease of illustration, and such omissions do not limit the embodiments outlined in any way. It should be understood that the drawings and the detailed description thereto are not intended to limit the invention to the particular form disclosed, but on the contrary, the invention is to cover all modifications, equivalents, and alternatives falling within the scope of the present invention as defined by the appended claim.
[0025] As used throughout this description, the word "may" is used in a permissive sense (i.e. meaning having the potential to), rather than the mandatory sense, (i.e. meaning must). Further, the words "a" or "an" mean "at least one" and the word "plurality" means "one or more" unless otherwise mentioned. Furthermore, the terminology and phraseology used herein are solely used for descriptive purposes and should not be construed as limiting in scope. Language such as "including," "comprising," "having," "containing," or "involving," and variations thereof, is intended to be broad and encompass the subject matter listed thereafter, equivalents, and additional subject matter not recited, and is not

intended to exclude other additives, components, integers, or steps. Likewise, the term "comprising" is considered synonymous with the terms "including" or "containing" for applicable legal purposes. Any discussion of documents, acts, materials, device (10)s, articles, and the like are included in the specification solely for the purpose of providing a context for the present invention. It is not suggested or represented that any or all these matters form part of the prior art base (1) or were common general knowledge in the field relevant to the present invention.
[0026] In this disclosure, whenever a composition or an element or a group of elements is preceded with the transitional phrase "comprising", it is understood that we also contemplate the same composition, element, or group of elements with transitional phrases "consisting of, "consisting", "selected from the group of consisting of, "including", or "is" preceding the recitation of the composition, element or group of elements and vice versa.
[0027] The present invention is described hereinafter by various embodiments with reference to the accompanying drawing, wherein reference numerals used in the accompanying drawing correspond to the like elements throughout the description. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiment set forth herein. Rather, the embodiment is provided so that this disclosure will be thorough and complete and will fully convey the scope of the invention to those skilled in the art. In the following detailed description, numeric values and ranges are provided for various aspects of the implementations described. These values and ranges are to be treated as examples only and are not intended to limit the scope of the claims. In addition, several materials are identified as suitable for various facets of the implementations. These materials are to be treated as exemplary and are not intended to limit the scope of the invention.
[0028] Figure 1 illustrates the method to drag the conventional trolley on staircase using the proposed mechanism with the help of a Velcro belt. A trolley on stairways is shown in Figure 1 comprises a portable mechanism assembly and a

Velcro belt. The mechanism is being attached with the trolley with the help of Velcro belt. Portable mechanism assembly consists of six major components. The frame, on which the trolley is attached, has been designed in such way that it will provide a better stability to the trolley. The diameter of the wheels in the mechanism are gradually increasing to provide more stability, and a good holding posture for the individuals while climbing up or down on stairways. At the lower end of the mechanism, a suspension is being attached to avoid sudden impact and comfort during motion.
[0029] In the present embodiment, Figure 2 illustrates the drawings (front view, top view, side view and isometric view) of the portable mechanism device where the frame of steel plate of dimension CxDxB (width x height x thickness) is designated as 1. This frame provides a base for other components of the invention. The portable mechanism assembly consists of locking mechanism 2, suspension 3, wheel 4, channel beam 5 and nut and bolt as 6. Figure 3 is the description of the frame 1 which is used to support the trolley so that the stability is maintained during the upward or downward motion. Lower end of the frame 1 is connected with the locking mechanism 2 for the adjustment of the height according to the stair heights, while the other end is connected with the channel beam 5. The locking mechanism is engaged with 6 which provide support to the suspension 3. Figure 4 shows the dimensional details of suspension 3 which is further connected with the channel beam 5. Wheels are connected with the channel beam 5 with the help of nut and bolt 6. The wheels 4 with increasing diameter are being attached with the channel beam 5 to provide better posture position to person holding the handle of the trolley. The channel beam 5 consists of a series of paired wheels 4 with the help of nut and bolt 6. The wheels 4 are connected with the help of nut and bolt 6, to provide better gripping. These wheels are a kind of bearing wheel type roller which are readily available in the market.
[0030] This portable mechanism is a convenient and simple method that offers several advantages like easy traversal of trolleys along the staircases with the minimal effort. The proposed embodiment will be helpful for dragging all the

kind of conventional trolley in staircase. Therefore, the mechanism is preferable for the regular use in contrast to other costly trolley available in the market. The invention will also cause less damage to the fragile luggage due to the suspension system which will also provide smooth and easy transportation. This mechanism is portable and can be easily attached and detached to/from the trolley within minutes using Velcro belts. As a result, it will not be always necessary to keep it engaged with the trolley and able to carry it separately and with a single mechanism and multiple trolleys (separately) can be dragged with a single device. This mechanism also provides an additional aid to the user in case of different staircase heights, where the device's height can be adjusted using the locking mechanism. Variable wheel diameters add extra stability to the device. This device is flexible to be used for children, adults, pregnant women, as well as elderly individuals. Beside these novel features, various substitutions and modification can be further made without departing the spirit or scope of the invention.
[0031] Various modifications to these embodiments are apparent to those skilled in the art from the description and the accompanying drawings. The principles associated with the various embodiments described herein may be applied to other embodiments. Therefore, the description is not intended to be limited to the embodiments shown along with the accompanying drawings but is to be providing the broadest scope consistent with the principles and the novel and inventive features disclosed or suggested herein. Accordingly, the invention is anticipated to hold on to all other such alternatives, modifications, and variations that fall within the scope of the present invention and appended claims.

We Claim:

1. A portable stair climbing mechanism for the conventional trolley, the
mechanism is comprising:
a frame with a suspension;
a locking mechanism connected to the frame for adjusting a height as per a
staircase height requirement;
a channel beam connected to the frame that holds a handle; and
a one or more wheels with gradually increasing diameter are attached
symmetrically on left and right sides of the channel beam;
wherein upon placing the luggage on the beam, the luggage is fastened to
the beam using a fastener, the height is adjusted as per requirement using
the locking mechanism; wherein in order to move the luggage through
staircase, the user needs to pull the mechanism using the handle.
2. The mechanism as in claim 1, wherein the fastener is a Velcro belts for attaching & detaching the frame to the conventional luggage.
3. The mechanism as in claim 1, wherein the frame of steel plate provides a base for other components of the invention and used to support the trolley for its stability during the upward or downward motion.
4. The mechanism as in claim 1, wherein a lower end of frame is connected with the locking mechanism which have two sub-components viz. locking mechanism-I for upper half and locking mechanism-II for lower half
5. The mechanism as in claim 1, wherein the locking device allows the height adjustment includes one or more hole at appropriate distances.
6. The mechanism as in claim 1, wherein the suspension includes one or more springs.
7. The mechanism as in claim 1, wherein the locking mechanism is engaged with nuts and bolts which provides support to the suspension.