|Title of Invention||
GRAVITY DRIVEN BICYCLE
|Full Text||Form 2
THE PATENTS ACT, 1970
Gravity driven bicycle
12, A2/2, Afco Society L.IC. Colony, Borivli (West), Mumbai 400 103. Maharashtra, India
The following specification describes the nature of this invention:-
This invention relates to a gravity driven bicycle or a machine/device comprising the said bicycle.
When a rider in standing position drives a bicycle, he shifts his body weight alternately from one pedal to the other to drive the bicycle, hi this case flie drive force is obtained mostly from the rider's body weight and partly from the muscle action of his hands and legs.
When a rider in sitting position drives a bicycle, he uses his legs alternately to push down the pedals to drive the bicycle. In this case the drive force is obtained mostly from the muscle action of legs and partly from his body weight.
In both the above cases the rider's feet move the pedals in circles which consumes a lot of energy.
The main object of his invention is to provide a mechanism which enables the rider of a bicycle to use his body weight to a greater extent while riding a bicycle in sitting position, standing position or leaning on a seat bar.
Another object of this invention is to change the circular movement of the pedals of a bicycle to up and down movement and thereby save the rider's effort and energy while riding a bicycle in sifting position, standing position or leaning on a seat bar.
The invention will now be described with reference to the accompanying drawings wherein :-
Figure-1 shows the right side elevation of a gravity driven bicycle with the rider's seat in horizontal position, pedal lever in horizontal position, crank shaft lever in inclined forward position and the right side end of the crank shaft in horizontal forward position.
Figure-2 shows the right side elevation of the gravity driven bicycle with the right side end of the rider's seat tilted downwards, crank shaft lever and the right side end of the
crank shaft in vertical downward position and the front end of the pedai at bottom position.
Figure-3 shows the front elevation of the rider's seat, crank shaft and the sprocket wheel in figure-2.
Figure-4 shows (he right side elevation of the gravity driven bicycle with the riders seat in horizontal position pedal lever in horizontal position, crank shaft lever in inclined backward position, and the right side end of the crank shaft in horizontal back ward position.
Figure-5 shows (he right side elevation of the gravity driven bicycle wife the right side end of the rider's seat tilted upwards, crank shaft lever and the right side end of the crank shaft in vertical top position and the front end of the pedal lever in top position.
Figure-6 shows the front elevation of the rider's seat, crank shaft and sprocket wheel in figure-5.
Referring to figures 1 to 6 the gravity driven bicycle according to an embodiment of this invention comprises of:-
a rider's seat (part 1 in figs 1 to 6) which is able to tilt and /or slide to right or left, coupled at it's right and left ends to seat levers (part 2 in figs. 1 to 6) which are mounted vertically on the bicycle's frame so that the seat levers are free to move only vertically upwards or downwards,
top levers (part 3 in figs 1,2,4, & 5), connecting levers (part 4 in figs. 1,2,4, & 5), bottom levers (part 5 in figs. 1,2,4 & 5) and crank shaft levers (parl 6 in figs. 1,2,4,& 5) connecting the bottom ends of the seat levers to the right and left side ends of crank shaft: (part 9 in figs. 1 to 6) which turns a sprocket, wheel (Part 13 in figs 1 to 6) to drive the bicycle.
right and left side pedal levers (part 7 in figs. 1,2,4 & 5) whose rear ends are pivoted on or near the rear wheel axle of the bicycle,
pedals (part 8 in figs. 1,2,4 & 5) pivoted at the front end of the pedal levers'
pedal lever pins (part 10 in figs. 1,2,4 & 5 ) on the crank shaft levers slidably engaged in pedal lever slots (part 11 in figs. 1,2,4 & 5) so that the pedal lever movement is transmitted to the crank shaft levers, parts on the left side of the bicycle (not shown in figures) corresponding to the right side parts.
The working of the gravity driven bicycle is described below.
When the rider of the gravity driven bicycle seated on the rider's seat shifts his body weight to the right end of the seat his body weight pushes down the seat, lever which in turn pushes down the crank shaft and turns the right sprocket wheel with the force of gravity transmitted to it through the top lever, connecting lever, bottom lever and crank shaft lever. The sprocket wheel through a chain turns the rear wheel of the bicycie driving it forward.
As the rider shifts the body weight to the right side, he also pushes down with his right leg the right pedal which in turn pushes the right crank shaft down through the right side pedal lever and crank shaft lever. This action adds to the force of gravity in rotating the sprocket wheel.
Simultaneously as the right side crank shaft and right side pedal move to their extreme bottom position the left side crank shaft and the left side pedal moves upward reaching their extreme top position through corresponding movements of the crank shaft and levers on the left side in the opposite direction. At that point the rider shifts his body weight to the left side end of the rider's seat and pushes down the left side pedal. This action helps the sprocket wheel to continue it's rotary motion in the same direction and drives the bicycle forward.
Thus by alternately shifting his body weight from right to left, arid left to right and
pushing the corresponding pedal down a rider drives a gravity driven bicycle mostly by
the force of gravity and by least effort of muscles.
Further as the pedal movement is only upward and downward the effort of the legs is
In another embodiment of this invention the rider of the gravity driven bicycle standing on the pedals lean on the seat bar which he slides to the left and right to shift his body weight to the corresponding pedal to drive the bicycle.
In yet another enbodiment of this invention the force generated by shifting the body weight of the rider or pressing the pedals is transmitted by a hydraulic system to toe sprocket wheel or rear wheel of the bicycle to. turn them to drive the bicycle.
Dated this 5th day of feb 2001.
The Controller of Patents, Patent office, at Mumbai.
|Indian Patent Application Number||120/MUM/2001|
|PG Journal Number||07/2009|
|Date of Filing||05-Feb-2001|
|Name of Patentee||WILSON VARGHESE|
|Applicant Address||12, A2/2, AFCO SOCIETY, L.I.C. COLONY, BORIVLI (WEST), MUMBAI 400 103, MAHARASHTRA, INDIA.|
|PCT International Classification Number||N/A|
|PCT International Application Number||N/A|
|PCT International Filing date|