Field of Invention
This invention in general relates to auto mobile. In particular this invention relates to scooter type motor cycle. The present invention to "Drive arrangement of a pump on a variator engine for scooter type motor cycle"
State of Art
In any known type of variator engines for two wheelers, the drive for oil or liquid coolant pump is taken from any side of the crankshaft through worm and worm wheel or through a spur gearing. In such arrangement the overhang of the crankshaft increases due to increase in the length of the crankshaft. In order to improve the rigidity of such system with large overhand, the diameter of the crankshaft needs to be increased thereby supporting on bigger journal bearings. Further the space requirements to mount the pump on either the left or right side of the engine crankcase is also increased. Consequent to these the weight and material cost of the components increases.
Many device are already known in the art. However the known device suffer from various drawbacks.
Accordingly what is needed in the art is an improvement that overcomes the above mentioned deficiencies of the prior art.
It is to be noted that the prior art description give in detail information of the technology, method, process and system known in the art. It explain the deficiency in the related art and the object of the invention being to overcome or surmount the problem associated with the prior art. This forms the essential feature and the object of the invention.
SUMMARY OF INVENTION
The inventors have made great effort to provide a device which meet the requirement of the industry and overcome the problem associated in the prior art.

To achieve the above object according to first aspect and feature of the present invention there is provided a device to improve, efficiency,.
According to second aspect and feature of the invention in addition to the first feature the invention comprises a device which is unique, rugged efficient, economical.
At the outset of the description which follows it is to be understood that ensuring description only illustrate a particular from of this invention. However, such particular form is only an exemplary embodiment without intending to imply any limitation on the scope of this invention. Accordingly, the description is to be understood as an exemplary embodiment and reading of the invention is not intended to be taken restrictively.
The above and other objects features and disadvantages will be clear fi-om the following description of preferred embodiment taken in conjunction with accompanying drawings.
The foregoing description is outlined rather broadly preferred and alternative feature of the present invention so that those skilled in the art may better understand the detailed description of the invention that follows. Additional features of the invention will be described hereinafter that form the subject of claims of the invention. Those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiment as a basis for designing and modifying other structures for carrying out the same purposes of the present invention. Those skilled in the art should realize such equivalent conception do not depart from the spirit and scope of the invention in its broadest form.
Drive arrangement of a pump on a variator engine for scooter type motor cycle is characterized in that said pump taking drive in a unique manner on the left side of the engine utilizing the space available in the cover variator where by weight and material cost are substantially decreased.

The accompanying drawings are intended to provide further understanding of invention and is incorporated in and constitute a part of invention. The drawings illustrate an embodiment of invention and together with the description illustrate principle of invention.
The drawings should not be taken as implying any necessary limitation on the essential scope of invention.
The drawings are given by way of non-limitative example to explain the nature of the invention.
For a more complete understanding of the instant invention reference is now made to the following description taken in conjunction with accompanying drawings.
The various feature of novelty which characterise the invention are pointed out specifically in the claims which a part of description. For a better understanding of the invention, its operating advantage, specific objects obtained by its use, reference should be made to the drawings and descriptive matter is which there are illustrated and described preferred embodiments of invention.
Referring now to drawings, where like numerals designate identical or corresponding parts throughout the referred views.
Object of the Invention
It is therefore an object of this invention to overcome the above problem by accommodating the pump and taking drive in a unique manner on the left side of the engine utilizing the space available in the cover variator.
Statement of Drawings
Embodiments of the present invention will be now described with reference to following Figures. Figure 1: A cross sectional drawing of a typical variator engine Figure 2: A left side elevation of the engine

Detailed description of an Embodiment of Invention
Figure 1 shows a scooter type motorcycle engine with a variator type automatic transmission of the present invention. As shown in Figure 1 the power unit P comprises a two stroke engine E and a belt type infinitely variable transmission 1 coupled to the left side surface of the engine E. The crankcase 2, cylinder block 3 coupled at the front surface of crankcase 2 and arranged in a substantially horizontal manner, and cylinder head 4 joined to upper surface of the cylinder block 3 constitute the engine E. A crankshaft 5 housed in and supported by crankcase 2 is connected to a piston 6 moving up and down within a cylinder bore of cylinder block 3a via connecting rod 7.
The crankcase 2 comprises of two halves crankcase left 2 a and crankcase right 2b. Left crank journals of crankshaft 5a & 5b are then sandwiched between the crankcase halves 2a & 2b^via ball bearings 8. A drive pulley 9 of the infinitely variable transmission 1 is attached to a journal outer shaft section extending outwards from the left crank journal 5a and transmission case 10 is bolted to the left end of crankcase 5a.
The drive pulley 9 is tightened with a ratchet nut 11 on the left crankshaft 5a end Two lugs integrally forged inside a cavity of the ratchet nut 10 drive a lug 12, which is welded to the pump shaft 13. The pump shaft 13 is supported on two bearings 14 housed in the insert 15, which is encast with the transmission cover 10. To the other end of pump shaft 13, a worm 16 is mounted on splines provided on the shaft 13, which is retained by a circlip 17. An oil pump or coolant pump 18 is attached to worm wheel 19.
On the outer diameter of the insert a freely rotating gear kick starter driven 20 is housed. The gear kick-starter driven 20 is driven by drive gear 21 through idler gear 22 supported on an idler shaft 23 encast to the transmission cover 10.
The invention has been explained in relation to specific embodiment. It is inferred that the foregoing description is only illustrative of the present invention and it is not intended that the invention be limited or restrictive thereto. Many other specific embodiments of the present invention will be apparent to one skilled in the art from the foregoing disclosure. All substitution, alterations and modification of the present invention which come within the scope

of the following claims are to which the present invention is readily susceptible without departing from the spirit of the invention.
The scope of the invention should therefore be determined not with reference to the above description but should be determined with reference to appended claims along with full scope of equivalents to which such claims are entitled.

We Claim
1. A Drive arrangement of a pump on a variator engine for scooter type motor cycle is
characterized in that said pump taking drive in a unique manner on the left side of the
engine utilizing the space available in the cover variator where by weight and material
cost are substantially decreased.
2. Drive arrangement of a pump on a variator engine for scooter type motor cycle as
claimed in claim 1 wherein the drive arrangement wherein power unit comprises a two
stroke engine and a belt type infinitely variable transmission coupled to the left side
surface of the engine, the crankcase cylinder block coupled at the front surface of
crankcase and arranged in a substantially horizontal manner, and cylinder head joined to
upper surface of the cylinder block constitute the engine, a crankshaft housed in and
supported by crankcase is connected to a piston moving up and down within a cylinder
bore of cylinder block via connecting rod .
3. Drive arrangement of a pump on a variator engine for scooter type motor cycle as
claimed in claim 1 wherein the crankcase comprises of two halves crankcase left a and
crankcase right, left crank journals of crankshaft are then sandwiched between the
crankcase halves via ball bearings, a drive pulley of the infinitely variable transmission
is attached to a journal outer shaft section extending outwards from the left crank joumal
and transmission case is bolted to the left end of crankcase .
4. Drive arrangement of a pump on a variator engine for scooter type motor cycle as
claimed in claim 1 wherein the drive pulley is tightened with a ratchet nut on the left
crankshaft end two lugs integrally forged inside a cavity of the ratchet nut drive a lug
which is welded to the pump shaft, the pump shaft is supported on two bearings housed
in the insert, which is encast with the transmission cover, to the other end of pump shaft
a worm is mounted on splines provided on the shaft which is retained by a circlip, an oil
pump or coolant pump is attached to worm wheel.
5. Drive arrangement of a pump on a variator engine for scooter type motor cycle as
claimed in claim 1 wherein on the outer diameter of the insert a freely rotating gear kick
starter driven is housed, the gear kick-starter driven is driven by drive gear through
idler gear supported on an idler shaft encast to the transmission cover.
6. Drive arrangement of a pump on a variator engine for scooter type motor cycle as
described in the complete specification and as illustrated by way of drawings