DESC:FIELD OF THE INVENTION:
This invention relates to the field of mechanical engineering.

Particularly, this invention relates to an improved wheelchair.

BACKGROUND OF THE INVENTION:
A wheelchair is a chair with wheels, used when walking is difficult or impossible due to illness, injury, problems related to old age, or disability. Wheelchairs are used to assist in movement on floor or ramp.

However, unless a ramp is constructed, it is impossible forsuch wheelchairs to traverse stairs.

Even if there are national mandates for all public buildings to be wheelchair accessible, these guidelines are rarely followed and implemented. Persons using wheelchair face massive challenges in such situations.

Therefore, there is a need for a wheelchair which provides a solution to the aforementioned problems.

OBJECTS OF THE INVENTION:
An object of the invention is to provide a wheelchair which can also be used in staircases for climbing up.
Another object of the invention is to provide a wheelchair which does not need a ramp to go up or to go down.

SUMMARY OF THE INVENTION:
According to this invention, there is provided an improved wheelchair with its lateral wheels comprising circumferentially extending stubs in a radially outward manner from an outer circumference of each of these wheels, in that, a plurality of stubs, radially extending outwards, with adjacent stubs spaced apart from each other by a sector of a circumference of said wheel with a sector distance between adjacent stubs being equal, said sector distance being adjustable in correlation to height of steps of a staircase that said wheelchair has to traverse.

In at least an embodiment, each of said stubs being provided with a distal metal end or a rubber end having a same curvature as that of said wheel.

In at least an embodiment, a seat being located between two wheels.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
The invention will now be described in relation to the accompanying drawings, in which:
FIGURE 1 illustrates the improved wheelchair of this invention and
FIGURE 2 illustrates the improved wheelchair of this invention, in action.
DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
According to this invention, there is provided an improved wheelchair.

FIGURE 1 illustrates the improved wheelchair of this invention.

FIGURE 2 illustrates the improved wheelchair of this invention, in action.

In at least an embodiment, a wheelchair’s lateral wheels (102, 105) are modified to have circumferentially extending stubs (103, 106) in a radially outward manner from the outer circumference (105) of each of these wheels (102, 105). Thus, a plurality of stubs (103, 106), radially extending outwards, adjacent stubs spaced apart from each other by a sector of the circumference of the wheel, are provided. The sector distance between the stubs should be equal and distance is adjusted by calculating height of the steps of the staircase it has to traverse.

In at least an embodiment, each such stub (103, 106) is provided with a distal metal end or a rubber end having the same curvature as that of the wheel.

A seat (104) is located between the two wheels (102, 105).

Reference numerals 101, 107, 109 refer to segments which define a pulling / pushing assembly for the wheelchair.
Reference numeral 108 refers to a foot rest for the wheelchair.
Reference numeral 111 refers to an axle about which the wheels (102, 105) are fixed to the wheelchair.
This improvised wheelchair is suitable for specially-abled / differently-abled persons. A person with leg disability can climb up a staircase with the help of this improvised wheelchair. This device is helpful for climbing up a staircase where lift facility is not available.

The device is working manually, but there is a further scope of functioning automatically by adjusting a lifting machine with it. The device is very simple and manufacturing cost is also low.

The TECHNICAL ADVANCEMENT of this invention lies in special design of wheels of a wheelchair assembly.

While this detailed description has disclosed certain specific embodiments for illustrative purposes, various modifications will be apparent to those skilled in the art which do not constitute departures from the spirit and scope of the invention as defined in the following claims, and it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.
,CLAIMS:I CLAIM,

1. An improved wheelchair with its lateral wheels (102, 105) comprising circumferentially extending stubs (103, 106) in a radially outward manner from an outer circumference (105) of each of these wheels (105), in that, a plurality of stubs (103, 106), radially extending outwards, with adjacent stubs spaced apart from each other by a sector of a circumference of said wheel (102, 105) with a sector distance between adjacent stubs being equal, said sector distance being adjustable in correlation to height of steps of a staircase that said wheelchair has to traverse.

2. The improved wheelchair as claimed in claim 1 wherein, each of said stubs (103, 106) being provided with a distal metal end or a rubber end having a same curvature as that of said wheel.

3. The improved wheelchair as claimed in claim 1 wherein, a seat (104) being located between two wheels (102, 105).

Dated this 4th day of October 2022

Dr. Shilpa Gharve
Patent Agent
(Reg. No. IN/PA 890)