CLIAMS:
I claim:

1. An anti rollback system of a vehicle for substantially preventing vehicular rollback on an incline, the system comprising:
an one way gear system (7) coupled to the counter shaft (11) through the intermediate gear (8);
a fork rod (6) is the extension of reverse gear selector rod; and
a shift fork (5) is coupled to a synchromesh device (9), wherein the shift rod for movement of the synchromesh device’s (9) from engaging and disengaging with the counter shaft (11) thereby preventing vehicular rollback on an incline plane.

2. The anti rollback system as claimed in claim 1, further comprising a forward motion and neutral position at incline:
the synchromesh device engaged to the intermediate gear (8);
a one way gear system (7) and counter shaft (11) coupled through the gear (8), wherein synchromesh device engaged to gear (8) formulates the counter shaft to rotate in forward direction thereby arrests reverse rolling.

3. The anti rollback system as claimed in claim 1, further comprising a reverse motion at an incline when the reverse gear is applied:
the synchromesh device is disengaged from gear (8) and engaged to the gear (12) simultaneously;
a gear (12) is coupled to the one way gear system (7) through an intermediate gear (3), wherein the coupling assist to reverse the rotation of the one way gear shaft (13).

4. The anti rollback system as claimed in claim 1, wherein when the counter shaft (11) rotates to the reverse direction it prevents the forward rotation of the counter shaft (11) and allows only the reverse motion of the vehicle.

5. The anti rollback system as claimed in claim 1, wherein one way gear system works with the ratchet mechanism.
,TagSPECI:FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See section 10, rule 13)
“Anti-rollback System (ARS)”
By
BASIL KURIAN
Vellathinanical, Keerampara P.O.,
Kothamangalam, Ernakulam, 686681

The following specification particularly describes the invention and the manner in which it is to be performed.

Field of the invention
The present invention mainly relates to vehicle transmission and more particularly to a vehicle transmission including a gear system operable for preventing the unintended rolling of a vehicle in an inclined plane.
Background of the invention
A vehicle is well known in the art which is a transportable machine that transports passengers, cargo and the like. Most often, vehicles are manufactured, such as bicycles, cars, trucks, busses, motorcycles, trains, ships, boats, and aircrafts and the like.
Generally, the vehicle consists of engine, transmission, fuel tank, brake, shock absorber and the like. The engine is the one which has designed to convert energy into useful mechanical motion. The transmission unit provides controlled application of the power to engine with the assembly of parts including the speed-changing gears, propeller shaft and etc. A fuel tank is a safe container for flammable fluids typically applied to part of an engine system. A brake is a mechanical device which inhibits motion of the vehicle. Normally, the user stops the vehicle using the brake. But, stopping a car in a hurry on a slippery road may be very challenging.
As is generally known, a motor vehicle i.e. cars, busses, heavy trucks, off-road vehicle and etc, can roll unintentionally or contrary to the desires or intentions of the driver. Such unintended rolling can especially occur during slow forward or reverse driving, or starting to drive from a standstill, steeply sloping terrain or on an incline plane of a roadway and etc. Particularly, such unintended rolling becomes dangerous and sometimes ends with accidents.
Such unintended rolling of a vehicle may occur, for example, through inappropriate combinations of the driver's operation of gear shift levers, a driving pedal such as the accelerator pedal, a brake pedal, a hand operated parking brake, a clutch and the like. The forward rolling of the vehicle may be controlled by the brake. Moreover, the unintended rolling of a vehicle is especially dangerous if it occurs in a direction opposite to the driving direction intended by the driver. Under certain circumstances, it may be impossible to stop the vehicle by applying the brakes after a substantial unintended rolling speed and momentum have already been attained, because then the wheels will simply lock-up and skid or slide on the ground.
As a result, these transmissions employed with a hill-holder mechanism in an effort to keep the vehicle from rolling backwards on an incline. In one approach, an electronic braking system could be used as the hill-holder mechanism, however the electronic braking system is costly to implement in a vehicle.
One less costly approach when compared to an electronic braking system is a one-way clutch (OWC). However, several issues exist that make implementing a one-way clutch not feasible in some situations. For example, if a selectable one-way clutch is used for the park, hill-hold drive (where the hill-hold feature is available), and reverse gear positions, the self-locking elements in the one-way clutch do not allow for the transmission to be shifted from the hill-hold drive into the reverse gear position.
Therefore, there exists a need in the art for a hill-hold mechanism which is cost effective and provides effortless functional to solve the above mentioned limitations.
Objective of the Invention
The main objective of the present invention is to avoid accidents due to the rolling back of vehicle in incline plane.
Another objective of the present invention enables the potentiality of the clutch which ultimately enhances the life of the same and it doesn’t require any other additional activating systems.
Summary of the invention
An aspect of the present invention is to address at least the above-mentioned problems and/or disadvantages and to provide at least the advantages described below.
Accordingly, in one aspect of the present invention relates to an anti-rollback system of a vehicle for substantially preventing vehicular rollback on an incline, the system comprising: an one way gear system (7) coupled to the counter shaft (11) through the intermediate gear (8), a fork rod (6) is the extension of reverse gear selector rod and a shift fork (5) is coupled to a synchromesh device (9), wherein the shift rod for movement of the synchromesh device’s (9) from engaging and disengaging with the counter shaft (11) thereby preventing vehicular rollback on an incline plane.
Other aspects, advantages, and salient features of the invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses exemplary embodiments of the invention.
Brief description of the drawings

The above and other aspects, features, and advantages of certain exemplary embodiments of the present invention will be more apparent from the following description taken in conjunction with the accompanying drawings in which:
Figure 1(a) shows the schematic illustration of a multiple speed dual clutch transmission of a hill-holder assembly.
Figure 1 (b) shows the side view of a hill-holder assembly in a first disengaged position.
Figure 1 (c) shows the cross-sectioned view of the hill-holder assembly including a hill-hold pin.
Figure 2 shows the anti rollback system (ARS) according to one embodiment of the present invention.
Persons skilled in the art will appreciate that elements in the figures are illustrated for simplicity and clarity and may have not been drawn to scale. For example, the dimensions of some of the elements in the figure may be exaggerated relative to other elements to help to improve understanding of various exemplary embodiments of the present disclosure.
Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures.
Detail description of the invention
The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the invention. Accordingly, it should be apparent to those skilled in the art that the following description of exemplary embodiments of the present invention are provided for illustration purpose only and not for the purpose of limiting the invention as defined by the appended claims and their equivalents.
It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a component surface” includes reference to one or more of such surfaces.
By the term “substantially” it is meant that the recited characteristic, parameter, or value need not be achieved exactly, but that deviations or variations, including for example, tolerances, measurement error, measurement accuracy limitations and other factors known to those of skill in the art, may occur in amounts that do not preclude the effect the characteristic was intended to provide.
Figs. 1 through 4, discussed below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way that would limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged communications system. The terms used to describe various embodiments are exemplary. It should be understood that these are provided to merely aid the understanding of the description, and that their use and definitions, in no way limit the scope of the invention. Terms first, second, and the like are used to differentiate between objects having the same terminology and are in no way intended to represent a chronological order, unless where explicitly stated otherwise. A set is defined as a non-empty set including at least one element.
Figure 1(a) shows the schematic illustration of a multiple speed dual clutch transmission of a hill-holder assembly. The figure 1(a) shows the schematic illustration of hill-holder assembly 190 that is activated as a transmission 110 is placed in the first gear ratio. The transmission 110 includes a similar gear arrangement and includes an input shaft 112, an output shaft 114, a first interconnecting member 122, a second interconnecting member 124, and countershafts 126 and 128. The transmission 110 also includes gear sets 1, 2, 3, 4, and 5 for creating a plurality of forward gears as well as a gear set R for creating a reverse gear. The transmission 110 also includes a plurality of synchronizers 140, 142, 144, 146, 148 and 150. The hill-holder assembly 190 is activated upon engagement of the synchronizer 144 with a gear 152 located along the first countershaft 126. When the transmission 110 is engaged in the first gear ratio, the synchronizer 144 will engage the clutch member 192 with the hill-hold pin 194 such that the disk is only able to rotate in the first rotary direction F. The engagement of the hill-hold pin 194 with the disk 200 substantially prevents the gear 152 and the first countershaft 26 from rotating in the reverse direction R when the vehicle (not shown) is positioned on an incline. The figure 1 (b) shows the side view of a hill-holder assembly in a first disengaged position.
When the transmission 110 is shifted out of the first gear ratio and into another gear ratio, such as the reverse gear ratio, the synchronizer 144 disengages and the biasing member 306 axially moves the clutch member 192 into the disengaged position. In this disengaged position, the hill-hold pin 194 does not engage with the disk 200, and the first countershaft 126 is able to rotate in the second rotary direction R.
The figure 1 (c) shows the cross-sectioned view of the clutch member 192 and the hill-hold pin 194 held by the bearing 195 located on a portion of the transmission wall 196. The gear 152 is received by the disk 200 by a splined connection, however it is understood that other approaches may be used as well. The disk 200 is rotatable in the first rotary direction F and the second rotary direction R. The disk 200 has an outer surface 342 including the plurality of outer teeth 344. The outer teeth 344 of the disk 200 have a saw toothed profile configured to fixedly engage with the hill-hold pin 194. Specifically, the hill-hold pin 194 includes an outer surface 346 that fixedly engages with the outer teeth 344 of the disk 200.
Figure 2 shows the anti rollback system (ARS) according to one embodiment of the present invention.
The present invention shows the anti rollback system (ARS) mechanism in vehicle which fortifies a vehicle held on an inclined plane. The figure shows the entire gear train in the vehicle with anti rollback system (ARS) which includes third and fourth selector rod (1), first and second selector rod (2), gear (3), gear on one way gear system (4), shift fork (5), Extension of reverse fork rod (6), one way gear system (7), intermediate gear (8), synchromesh device (9), lay shaft (10), counter shaft (11), gear (12), one way gear system shaft (13).
The novice gear system coupled to the counter shaft (11) to the gearbox. The synchromesh device (9) engages the novice gear system to the counter shaft (11). Due to this, as a vehicle is stopped on an incline and the vehicle tempts to roll down, this gear system prevents the undesired motion but, which doesn’t affect the driven direction of the engine.
In the present invention, the vehicle is stopped on an incline plane and it is achieved by additionally adding the novice one way gear system (7) in the gear box. The one way gear system (7) of present invention works with ratchet mechanism. It can rotate freely in one direction and lock itself automatically. The novice gear system (7) is coupled to the counter shaft (11) through the intermediate gear (8). The fork rod (6) is the extension of reverse gear selector rod. The shift fork (5) is coupled to the synchromesh device (9) which helps the movement of the synchromesh device (9) for engaging and disengaging. The output shaft is being engaged with the novice one way gear system through synchromesh device. This gear system with the ratchet mechanism prevents rolling of the vehicle down on an incline automatically.
Case I: Forward motion and neutral position at incline:
The anti rollback system (ARS) in forward motion and neutral position at incline plane according to one embodiment of the present invention.
The figure shows the one way gear system (7) which is engaged to a counter shaft (11) through synchromesh device (9) for forward motion and neutral position at incline plane. At this time, the counter shaft (11) is only permitted to rotate in forward direction and it arrests the reverse rolling. The arresting of reverse motion is being done by the one way gear system (7).
Case II: Reverse motion at an incline:
The anti rollback system (ARS) in reverse motion and neutral position at incline plane according to one embodiment of the present invention.
The figure shows the anti rollback system with the reverse gear is applied at an incline, the synchromesh is disengaged from gear (8) and engaged to the gear (12) simultaneously. The gear (12) is connected to the one way gear system (7) through an intermediate gear (3). It helps to reverse the rotation of the one way gear shaft (13) when the counter shaft (11) rotates to the reverse direction. So it prevents the forward rotation of the counter shaft (11) and allows only the reverse motion of the vehicle.
Those skilled in this technology can make various alterations and modifications without departing from the scope and spirit of the invention. Therefore, the scope of the invention shall be defined and protected by the following claims and their equivalents.
FIGS. 1-2 are merely representational and are not drawn to scale. Certain portions thereof may be exaggerated, while others may be minimized. FIGS. 1-2 illustrate various embodiments of the invention that can be understood and appropriately carried out by those of ordinary skill in the art.
In the foregoing detailed description of embodiments of the invention, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the invention require more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive subject matter lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description of embodiments of the invention, with each claim standing on its own as a separate embodiment.
It is understood that the above description is intended to be illustrative, and not restrictive. It is intended to cover all alternatives, modifications and equivalents as may be included within the spirit and scope of the invention as defined in the appended claims. Many other embodiments will be apparent to those of skill in the art upon reviewing the above description. The scope of the invention should, therefore, be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. In the appended claims, the terms “including” and “in which” are used as the plain-English equivalents of the respective terms “comprising” and “wherein,” respectively.

I claim:

1. An anti rollback system of a vehicle for substantially preventing vehicular rollback on an incline, the system comprising:
an one way gear system (7) coupled to the counter shaft (11) through the intermediate gear (8);
a fork rod (6) is the extension of reverse gear selector rod; and
a shift fork (5) is coupled to a synchromesh device (9), wherein the shift rod for movement of the synchromesh device’s (9) from engaging and disengaging with the counter shaft (11) thereby preventing vehicular rollback on an incline plane.

2. The anti rollback system as claimed in claim 1, further comprising a forward motion and neutral position at incline:
the synchromesh device engaged to the intermediate gear (8);
a one way gear system (7) and counter shaft (11) coupled through the gear (8), wherein synchromesh device engaged to gear (8) formulates the counter shaft to rotate in forward direction thereby arrests reverse rolling.

3. The anti rollback system as claimed in claim 1, further comprising a reverse motion at an incline when the reverse gear is applied:
the synchromesh device is disengaged from gear (8) and engaged to the gear (12) simultaneously;
a gear (12) is coupled to the one way gear system (7) through an intermediate gear (3), wherein the coupling assist to reverse the rotation of the one way gear shaft (13).

4. The anti rollback system as claimed in claim 1, wherein when the counter shaft (11) rotates to the reverse direction it prevents the forward rotation of the counter shaft (11) and allows only the reverse motion of the vehicle.

5. The anti rollback system as claimed in claim 1, wherein one way gear system works with the ratchet mechanism.

Abstract
The present invention mainly relates to vehicle transmission. In one embodiment, the invention particularly relates to an anti-rollback system of a vehicle for substantially preventing vehicular rollback on an incline, the system includes an one way gear system (7) coupled to the counter shaft (11) through the intermediate gear (8), a fork rod (6) is the extension of reverse gear selector rod and a shift fork (5) is coupled to a synchromesh device (9), wherein the shift rod for movement of the synchromesh device’s (9) from engaging and disengaging with the counter shaft (11) thereby preventing vehicular rollback on an incline plane.
Figure 2 (for publication)