Title of Invention

"TRANSPORTATION DEVICE"

Abstract The invention relates to a human powered transportation device (1), comprising a carriage (2) having provision for seating at least a driver, and a driving unit (3) joined to the said carriage (2), the said driving unit (3) comprising a rear axle (4) coupled to two rear wheels (5) at its ends and being provided with first and second sprockets (6,7) adjacent to the said rear wheels (5); a front axle (8) having first and second free wheel (9,10) located at its ends and a third free wheel (11) located at about its center; and a front sprocket (12) having means (13) for receiving power from the driver; wherein the front sprocket is linked to the third free wheel and the first and second free wheels are linked to the first and second sprockets respectively for mobilizing the transportation device.
Full Text FIELD OF THE INVENTION
The present invention relates to a transportation device for carrying passengers, luggage and merchandise. More particularly, the present invention relates to a redesigned cycle rickshaw having modified structural configuration thereby enabling the rickshaw puller to reduce the destabilization and toppling when sudden brake is applied and to spend less energy (compared to the existing model) for driving the cycle rickshaw.
BACKGROUND AND PRIOR ART DESCRIPTION
The cycle rickshaw is a modified tricycle. It is a cheap mode of transportation device for carrying passengers, luggage and merchandise. The cycle rickshaw is used extensively in India as well as many other South-East Asian countries like Bangladesh, China, Vietnam, Singapore, Thailand etc. However, the shape and size of cycle rickshaw vary from one place to another. Principle of this mechanism is also not same in most of the places. In India, a population of about 0.86 million people is engaged in cycle rickshaw pulling.
The existing cycle rickshaws have a mechanism identical with that of the ordinary bicycle with a much-improved development with three wheels and a back coach for passengers and/or luggage propelled by human power. As shown in figures 2 and 3, the cycle rickshaw comprises two units, a driving unit and a passenger seating unit joined together. The main structure is made of iron. Passenger seat unit is made of wood, coir, metal sheet and Rexene. Bamboo sticks are used for fabrication of passenger hood. The structure of the hood is covered with a piece of canvas cloth. The hood is attached at both the sides of passenger coach with a metal clamp for the option of the folding and unfolding. The rickshaw puller sits on a saddle and rotates the front sprocket by applying force on the pedals. The rotation of the sprocket rotates the freewheel which is attached at the centre of the axle with the help of a connecting chain. Both the rear wheels are attached with the axle with the help of hubs. One of those remains fixed with the axle and can rotate with the rotation of axle. The other one remains free from the axle. It can move independently and helps to turn the vehicle. The rotation of the axle rotates the fixed wheel and moves the rickshaw. The rickshaw puller
steers the rickshaw by the handle bar attached with the front wheel by a fork shaped structure. Driving force is transmitted only to one of the rear wheels, which is fixed with the axle. As a result, the driver has to put constant efforts to keep the vehicle straight during movement or taking a turn, as the steering tends to turn to the side of the fixed wheel. Brake system is attached with the front wheel only. When the vehicle is at high speed or when it moves along downward slope, application of sudden brake causes destabilization and there is a chance of overturn.
In order to overcome the aforesaid drawbacks of the conventional rickshaws, a project entitled "Evaluation of occupational health problems of cycle rickshaw pullers and redesign of cycle rickshaw on ergonomic principles" was undertaken by Regional Occupational Health Centre (E) [ROHC (E)], Kolkata.
The main objective of the said project was to evaluate the health status of cycle rickshaw pullers and to develop and fabricate a new design of cycle rickshaw based on the principles of Ergonomics, which would be more convenient for the pullers as well as passengers and would be accepted all over the country.
OBJECTS OF THE INVENTION
The main object of the present invention is to provide a redesigned cycle rickshaw having improved efficient energy transmission system that reduces the energy spent by the driver/rickshaw puller for driving the vehicle.
Yet another object of the present invention is to provide a redesigned cycle rickshaw wherein the driver/rickshaw puller is not required to constantly make efforts to keep the vehicle straight during movement.
A still another object of the invention is to provide a redesigned cycle rickshaw having unique structural and functional features to provide more efficient control over the brake system.
A further object of the present invention is to provide a redesigned cycle rickshaw having an improved efficient brake system to enable the rickshaw puller to reduce the destabilization and toppling when sudden brake is applied.
SUMMARY OF THE INVENTION
The present invention provides a redesigned cycle rickshaw having changes incorporated in the structural configuration of the existing cycle rickshaw thereby enabling the rickshaw puller to reduce the destabilization and toppling when sudden brake is applied. The structure has been made of hollow mild steel pipe. The fabrication has been done by bending of pipes and joining by welding. There are two axles and three chains in the driving system. Passenger seat unit is made of hollow mild steel pipe with cantilever action. It consists of seat with padded armrest and backrest, hood and footrest. Seat is made of wooden board and sponge wrapped by a thick layer of synthetic sheet to provide comfort to the passenger. The dimension of the seat is determined based on the anthropometric dimension of human body. Provision for sliding hood for driver has also been made. The passenger footboard has been made flat. Sufficient space has been provided for keeping luggage under the passenger seat. Two footsteps have been provided on both the sides of the footboard. Brakes have been provided on the front wheels as well as on both the rear wheels.
STATEMENT OF INVENTION
Accordingly, the present invention relates to a human powered transportation device (1), comprising a carriage (2) having provision for seating at least a driver, and a driving unit (3) joined to the said carriage (2), the said driving unit (3) comprising;- a rear axle (4) coupled to two rear wheels (5) at its ends and being provided with first and second sprockets (6,7) adjacent to the said rear wheels (5); a front axle (8) having first and second free wheel (9. 10) located at its ends and a third free wheel (II) located at about its center; and a front sprocket (12) having means (13) for receiving power from the driver; wherein the front sprocket is linked to the third free wheel and the first and second free wheels are linked to the first and second sprockets respectively for mobilizing the transportation device.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
In order that the invention may be readily understood and put into practical effect, reference will now be made to exemplary embodiments as illustrated with reference to the accompanying drawings, where like reference numerals refer to identical or functionally similar elements throughout the separate views. The figures together with a detailed description below, are incorporated in and form part of the specification, and serve to further illustrate the embodiments and explain various principles and advantages, in accordance with the present invention where:
Figure 1 shows a conventional cycle rickshaw;
Figure 2 shows the driving system of conventional cycle rickshaw;
Figure 3 shows the driving system of conventional cycle rickshaw;
Figure 4 shows the front portion of redesigned cycle rickshaw of the present invention ;
Figure 5 shows the rear portion of the redesigned cycle rickshaw of the present invention;
Figure 6 shows the side portion of redesigned cycle rickshaw of the present invention;
Figure 7 shows the top portion of redesigned cycle rickshaw of the present invention;
Figure 8 shows the bottom portion of redesigned cycle rickshaw of the present invention;
Figure 9 shows the passenger seat unit in the redesigned cycle rickshaw of the present
invention;
Figure 10 shows the driving system of the redesigned cycle rickshaw of the present invention.
Figure 11 shows the footstep and brake in the rear wheel of redesigned cycle rickshaw of the
present invention.
Skilled artisans will appreciate that elements in the drawings are illustrated for simplicity and have not necessarily been drawn to scale. For example, the dimensions of some of the elements in the drawings may be exaggerated relative to other elements to help to improve understanding of embodiments of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
Before describing in detail embodiments that are in accordance with the present invention, it should be observed that the embodiments reside primarily in combinations of various components of the cycle rickshaw which perform an altogether new/improved function. Accordingly, the mechanism have been represented where appropriate numbers in the drawings, showing only those specific details that are pertinent to understanding the embodiments of the present invention so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having benefit of the description herein. The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that an article that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such article. An element proceeded by "comprises... a" does not, without more constraints, preclude the existence of additional identical components in the article.
The following description is presented to enable any person skilled in the art to make and use the invention. For purposes of explanation, specific nomenclature is set forth to provide a thorough understanding of the present invention. Descriptions of specific applications, methods, and apparatus are provided only as examples. Various modifications to the preferred embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
The present invention provides a human powered transportation device (1), comprising a carriage (2) having provision for seating at least a driver, and a driving unit (3) joined to the said carriage (2), the said driving unit (3) comprising;- a rear axle (4) coupled to two rear wheels (5) at its ends and being provided with first and second sprockets (6,7) adjacent to the said rear wheels (5); a firont axle (8) having first and second free wheel (9, 10) located at its ends and a third free wheel (11) located at about its center; and a firont sprocket (12) having
means (13) for receiving power from the driver; wherein the front sprocket is linked to the third free wheel and the first and second free wheels are linked to the first -and second sprockets respectively for mobilizing the transportation device.
In an embodiment of the present invention, the carriage is substantially made up of hollow steel pipes and is provided with a passenger seating unit made up of hollow mild steel pipes with cantilever action for carrying passengers and/or luggage.
In another embodiment of the present invention, the carriage is provided with a sliding hood, covered with water proof cloth or synthetic material for providing cover to the driver.
In still another embodiment of the present invention, the rear axle is coupled to the two rear wheels via respective first and second hubs, which can rotate freely on the rear axle, such that during motion of the transportation device, the rear axle remains stationary.
In yet another embodiment of the present invention, the first and second hubs are attached with the first and second sprockets respectively.
In a further embodiment of the present invention, each of the rear wheels is provided with a brake applying means for applying uniform brake to both the wheels.
In still further embodiment of the present invention, the front sprocket is linked to the third freewheel via a chain and the third free wheel is connected to the first and second free wheel via the front axle for equally transferring the power received by the front sprocket to the first and second free wheels.
In further more embodiment of the present invention, the first and the second freewheels are linked to the first and the second sprockets respectively via chains for transferring the power to the two wheels.In one more embodiment of the present invention, the front sprocket preferably has 48 teeths, the first, second and the third flywheels preferably have 22 teeths each and first and second sprockets have 24 teeths each.
In another embodiment of the present invention 16% reduction in energy cost for pulling the cycle rickshaw was achieved. The energy cost of work was 6.35 ± 0.88 (MO) and 5.36 ± 0.50 (M3) kcal.min"' for old model of cycle rickshaw and the present invention respectively, the difference being statistically significant.
In one more embodiment of the present invention, the energy cost of work has been reduced by 16% compared with the traditional version.
In the redesigned model, the object of efficiently utilizing the amount of energy spent by the driver/rickshaw puller has been achieved by modifying the cycle rickshaw in the manner described here below:
A sprocket (24 teeth) is attached with each hub of the two rear wheels. The hubs can rotate freely on the rear axle, which is stationary, while driving; the rickshaw puller applies force on the pedal and rotates the front sprocket. The rotation of the sprocket rotates the freewheel (22 teeth) which is attached at the centre of the front axle with the help of a connesting chain. Rotation of the front axle rotates the two other freewheels located at both the sides of the front axle. With the help of a chain, each freewheel rotates the sprockets of the rear wheel and the vehicle moves forward. Thus, the rotations of the two rear wheels are independent of each other. Thus, putting effort to keep the vehicle straight and taking turn has been omitted.
The brakes on the two rear wheels act on the principles of wire and lever mechanism. Application of brakes in the front and rear wheels can be controlled by two hands of the driver. Addition of two brakes with the two rear wheels reduced the probability of destabilization and toppling, when sudden brake is applied. Thus, the efficiency of brake system and safety of the driver and passenger has improved.
Comparison of existing and redesigned models
(Table Removed)
NOVELTY IN STRUCTURAL AND FUNCTIONAL CONFIGURATIONS
The redesigned cycle rickshaw (Parthasarathi) is unique due to the following change in the structural and functional configurations.
MODIFICATIONS IN THE STRUCTURAL CONFIGURATIONS
1. It is compact, easier to drive and more comfortable to passengers.
2. It is lighter in weight and requires less energy to drive
3. Provision has been made for adjustable hood for the rickshaw puller for preventing exposure to sun and rain. (Refer to Figs. 4 & 6)
4. Adequate space has been provided for passenger seat and footrest so that passengers can seat comfortably. (Refer to Figs. 4 & 5)
5. Passenger seat has been made of cantilever system. (Refer to Figs. 4 & 9)
6. Surface of footboard has been made flat. (Refer to Figs. 4 & 9)
7. Additional footstep has been provided for boarding the rickshaw (Refer to Figs. 7 &
11)
8. Adequate space has been provided under passenger seat for keeping luggage of the passengers (Refer to Fig. 5)
9. Comfortable padded armrest has been provided in both the sides of passenger seat. (Refer to Figs. 4 & 7).
MODIFICATIONS IN THE FUNCTIONAL CONFIGURATIONS
1. Both the rear wheels rotate due to rotation of freewheels of the front axle, by using two axles, three freewheels and three chains. This helps in reduction in effort for keeping the vehicle in a straight path. Independent movement of the rear wheels helps the vehicle to turn with less effort. (Refer to Fig 8 & 10).
2. Brake system has been provided in both the rear wheels (Refer to Fig. 11) in addition to only single brake in the front wheel of the traditional cycle rickshaw (Refer to Fig. 1). More efficient control has been achieved and safety of the vehicle and passengers improved.
3. The chain attached to the sprocket has been shortened (Refer to Fig 8) compared to that of the existing model (Refer to Fig 1). Use of three shorter chains reduces the chance of their dislocation from the sprockets.
4. Effort of the rickshaw pullers for driving the cycle rickshaw has been reduced.
5. Personal comfort of passenger while boarding the rickshaw and sitting on it has been raised.
The foregoing detailed description has described only a few of the many possible implementations of the present invention. Thus, the detailed description is given only by way of illustration and nothing contained in this section should be construed to limit the scope of the invention. The claims are limited only by the following claims, including the equivalents thereof




We Claim:
1. A transportation vehicle (1), comprising: a carriage(2) having provision for seating at
least a driver, and a driving unit (3) attached to the said carriage(2), characterized in
that, the said driving unit comprising:
a. a rear axle (4) coupled to two rear wheels (5) at the ends of said rear axle,
said rear axle comprises first (6) and second (7) sprockets disposed
adjacent to the said rear wheels (5);
b. a front axle (8) having first (9) and second (10) free wheels located at the
ends of the said front axle (8), and a third free wheel (11) located at about
the center of the said front axle; and
c. a front sprocket (12) having means (13) for receiving power from the
driver; wherein the front sprocket is linked to the third free wheel (11) and
the first (9) and second (10) free wheels are linked to the first (6) and
second (7) sprockets respectively for mobilizing the transportation device.
2. The transportation device as claimed in claim 1, wherein the carriage (2) is made up of hollow steel pipes and is provided with a passenger seating (14) unit made up of hollow mild steel pipes with cantilever action for carrying passengers and/or luggage.
3. The transportation device as claimed in claim 1, wherein the carriage (2) is provided with a sliding hood (15) covered with water proof cloth or synthetic material, for providing cover to the driver.
4. The transportation device as claimed in claim 1, wherein the rear axle (4) is coupled to the two rear wheels (5) via respective first (16) and second (17) hubs, said hubs rotate freely on the rear axle such that during motion of the transportation device, the rear axle (4) remains stationary.
5. The transportation device as claimed in claim 4, wherein the first (16) and second (17) hubs are attached with the first (6) and second (7) sprockets respectively.
6. The transportation device as claimed in claim 1, wherein each of the rear wheels (5) is provided with a brake applying means (18) for applying uniform brake to both the wheels (5).
7. The transportation device as claimed in claim 1, wherein the front sprocket (12) is linked to the third freewheel (11) via a chain (19) and the said third free wheel (11) is connected to the first (9) and second (10) free wheels via the front axle (8) for equally transferring the power received by the front sprocket (12) to the first (9) and second (10) freewheels.
8. The transportation device as claimed in claim 1, wherein the first (9) and second (10) free wheels are linked via chains (20) to the first (6) and second (7) sprockets respectively for transferring the power to the two wheels (5).
9. The transportation device as claimed in claim 1, wherein the front sprocket (12) has 48 teeths, the first (9), second (10) and third (11) flywheels have 22 teeths each, and first (6) and second (7) sprockets have 24 teeths each.

Documents:

1643-DEL-2005-Abstract-(04-02-2010).pdf

1643-DEL-2005-Abstract-(23-03-2011).pdf

1643-del-2005-abstract.pdf

1643-DEL-2005-Claims-(04-02-2010).pdf

1643-DEL-2005-Claims-(23-03-2011).pdf

1643-del-2005-claims.pdf

1643-del-2005-Correspondence Others-(11-04-2012).pdf

1643-DEL-2005-Correspondence Others-(12-03-2012).pdf

1643-DEL-2005-Correspondence Others-(23-03-2011).pdf

1643-DEL-2005-Correspondence-Others (04-02-2010).pdf

1643-del-2005-correspondence-others.pdf

1643-del-2005-description (complete).pdf

1643-del-2005-description (provisional).pdf

1643-DEL-2005-Drawings-(04-02-2010).pdf

1643-DEL-2005-Drawings-(23-03-2011).pdf

1643-del-2005-drawings.pdf

1643-DEL-2005-Form-1-(04-02-2010).pdf

1643-DEL-2005-Form-1-(23-03-2011).pdf

1643-del-2005-form-1.pdf

1643-del-2005-form-18.pdf

1643-DEL-2005-Form-2-(04-02-2010).pdf

1643-DEL-2005-Form-2-(23-03-2011).pdf

1643-del-2005-form-2.pdf

1643-del-2005-form-26.pdf

1643-DEL-2005-Form-3-(04-02-2010).pdf

1643-del-2005-form-3.pdf

1643-DEL-2005-Form-5-(23-03-2011).pdf

1643-del-2005-form-5.pdf

1643-del-2005-GPA-(11-04-2012).pdf

1643-DEL-2005-GPA-(23-03-2011).pdf


Patent Number 247859
Indian Patent Application Number 1643/DEL/2005
PG Journal Number 22/2011
Publication Date 03-Jun-2011
Grant Date 27-May-2011
Date of Filing 24-Jun-2005
Name of Patentee INDIAN COUNCIL OF MEDICAL RESEARCH
Applicant Address V. RAMALINGASWAMI BHAWAN, ANSARI NAGAR, POST BOX 4911, NEW DELHI - 110029, INDIA
Inventors:
# Inventor's Name Inventor's Address
1 DR. C. K. PRADHAN ERGONOMICS DIVISION, REGIONAL OCCUPATIONAL HEALTH CENTRE (E), INDIAN COUNCIL OF MEDICAL RESEARCH, BLOCK DP, SECTOR V, SALT LAKE, KOLKATTA -700091
2 SHRI. S. THAKUR ERGONOMICS DIVISION, REGIONAL OCCUPATIONAL HEALTH CENTRE (E), INDIAN COUNCIL OF MEDICAL RESEARCH, BLOCK DP, SECTOR V, SALT LAKE, KOLKATTA -700091
PCT International Classification Number B62K5/04
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA