FORM 2
THE PATENTS ACT, 1970
(39 OF 1970)
As amended by the Patents (Amendment) Act, 2005
&
The Patents Rules, 2003
As amended by the Patents (Amendment) Rules, 2006
COMPLETE SPECIFICATION
(See section 10 and rule 13)
TITLE OF THE INVENTION An improved gas valve.
APPLICANT (S)
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worli, Mumbai 400 030, Maharashtra, India, an Indian Company
INVENTOR (S)
Desale Rajgopal Shivdas, of Crompton Greaves Ltd, S3, Switchgear Division, A3, MIDC Ambad, Nashik-422010
PREAMBLE TO THE DESCRIPTION:
The following specification particularly describes the nature of this invention and the manner in which it is to be performed:

Field of the Invention:
This invention relates to the field of mechanical assemblies and mechanical equipment.
Particularly, this invention relates to the field of gas valves.
More particularly, this invention relates to an improved gas valve.
Background of the Invention:
A valve is a device that regulates, directs or controls the flow of a fluid, and hence, a gas valve is one which regulates the flow of gas. In instances where injection of gas or transfer of gas is required from one equipment to another such as from a cylinder to a machine, or from a pump to a tyre or the like scenarios, the use of a valve is warranted for enabling transfer without accounting for loss of gas to the atmosphere.
The valve includes a first engaging means which engages with a second engaging means on the equipment in which the gas is to be transferred. Typically, the first engaging means is a male or a female part. Correspondingly, the second engaging means is a female or a male part. The coupling of the male part to the female part warrants a complete coupled mechanism and forms or allows a passage for fluid (gas) transfer. The housing about the engaging means is designed to prevent leakage.
A DILO gas valve is a known valve in the art and used by many companies. DILO gas valve is a very specific type of construction used for preventing leakage of gas through pipe joints. It has two halves (Male half and Female

half). A typical DILO valve can be seen in Figure 1 of the accompanying drawings. In this type of construction of the prior art, a spring (12) loaded non return valve (14) is fitted on both male and female halves. This spring loaded half is very critical in machining and hence there is monopoly of manufacturer of the DILO valve. Due to accuracy involved and monopoly, cost of this valve is exorbitantly high. The nut (16) allows fitting. Reference numeral 18 refers to non return valve housing. The valve is enveloped with sealing (20) to prevent leakage of gas. Reference numeral 22 refers to positioning of circlip. Reference numeral 24 refers to positioning of Oring.
There is a need for a simpler design and a less expensive valve.
Objects of the Invention:
An object of the invention is to provide a simple designed gas valve.
Another object of the invention is to provide a relatively inexpensive gas valve.
Yet another object of the invention is to provide a gas valve with a relatively better life.
Still another object of the invention is to provide an easy to manufacture valve.
An additional object of the invention is to provide a gas valve which allows increased gas flow.
Yet an additional object of the invention is to provide a gas valve with relatively lesser number of valve parts.

Summary of the Invention:
According to this invention, there is provided an improved gas valve which comprises:
stationary pin ensconced within a female part of a valve housing in a co-axial manner such that said stationary pin does not protrude beyond a first lateral operating opening of said housing, said stationary pin adapted to co-operate with a retractable spring loaded male pin of a male part of said valve, in that, said stationary pin pushes said retractable pin to create a passage for allowing flow of gas from said female part to said male part.
Typically, a second lateral end of said housing of female part includes a rubber sleeve to impart resilience to said stationary pin while it is co-operating with said male pin.
Typically, said housing includes a nut at said first lateral operating opening in order to screw said male part to said female part to prevent leakage of gas during flow.
Typically, said housing includes circlip about said housing.
Brief Description of the Accompanying Drawings:
Figure 1 illustrates a schematic side view of a gas valve of the prior art.
The invention will now be described in relation to the accompanying drawings, in which:
Figure 2 illustrates a schematic side view of a female part of the gas valve;

Figure 3 illustrates a schematic side view of a male part of the gas valve; and Figure 4 illustrates a sectional auxiliary view of Figure 2.
Detailed Description of the Accompanying Drawings:
According to this invention, there is provided an improved gas valve.
Figure 2 illustrates a schematic side view of a female part of the gas valve. Figure 3 illustrates a schematic side view of a male part of the gas valve. Figure 4 illustrates a sectional auxiliary view of Figure 2.
In accordance with an embodiment of this invention, there is provided a stationary pin (32) ensconced within a female part of a valve housing (34) in a co-axial manner such that the stationary pin does not protrude beyond a lateral opening (36) of the housing. The housing is adapted to receive a male part (as seen by reference numeral 42 in Figure 3 of the accompanying drawings). This retractable spring loaded male pin (42) pushes the stationary pin (32) of the female part against a rubber sleeve (40) at the other lateral end (38). As the retraction occurs, there is a passage of flow that is formed from the female part to the male part.
In accordance with another embodiment of this invention, there is provided a rubber sleeve (40) at the other lateral end (38) such that there is resilience imparted to the stationary pin during the mating action of the male part to the female part of the valve.

Reference numeral 44 refers to nut. Reference numeral 46 refers to circlip.
While this detailed description has disclosed certain specific embodiments of the present invention 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.

We claim,
1. An improved gas valve comprising:
stationary pin ensconced within a female part of a valve housing in a co-axial manner such that said stationary pin does not protrude beyond a first lateral operating opening of said housing, said stationary pin adapted to co-operate with a retractable spring loaded male pin of a male part of said valve, in that, said stationary pin adapted pushes said retractable pin to create a passage for allowing flow of gas from said female part to said male part.
2. An improved gas valve as claimed in claim 1 wherein, a second lateral end of said housing of female part includes a rubber sleeve to impart resilience to said stationary pin while it is co-operating with said male pin.
3. An improved gas valve as claimed in claim 1 wherein, said housing includes a nut at said first lateral operating opening in order to screw said male part to said female part to prevent leakage of gas during flow.
4. An improved gas valve as claimed in claim 1 wherein, said housing includes circlip about said housing.