Title of Invention	AN IMPROVED NON-RETURN VALVE USEFUL FOR CONTROLLING THE FLOW OF FLUIDS
Abstract	An improved non-return valve useful for controlling the flow of fluids, which comprises a barrel nipple (1) having a blind flange (4) at the top end, characterized in that the said blind flange (4) being provided with a collar (5) having smooth surface so that it can sit properly on seat (6) of an adapter (2) which allows free movement of the barrel nipple encased in it, the said barrel nipple being provided with a plurality of circumferential holes below the blind flange (4) for passage of fluid, a pin (3) being provided at the open bottom end of the said barrel nipple to prevent it from going out of the adapter, the said adapter being provided with external threading at both ends for connecting to a pipe line.

Title of Invention

AN IMPROVED NON-RETURN VALVE USEFUL FOR CONTROLLING THE FLOW OF FLUIDS

Abstract

An improved non-return valve useful for controlling the flow of fluids, which comprises a barrel nipple (1) having a blind flange (4) at the top end, characterized in that the said blind flange (4) being provided with a collar (5) having smooth surface so that it can sit properly on seat (6) of an adapter (2) which allows free movement of the barrel nipple encased in it, the said barrel nipple being provided with a plurality of circumferential holes below the blind flange (4) for passage of fluid, a pin (3) being provided at the open bottom end of the said barrel nipple to prevent it from going out of the adapter, the said adapter being provided with external threading at both ends for connecting to a pipe line.

Full Text	This Invention relates to an improved non-return valve useful for controlling the flow of fluids. It is particularly useful for controlling the flow of water in the suction of water pumping line. The non-return valves being used for controlling the flow of water in water pipe line at present are of two types eg. foot valve and check valve. In a foot valve as shown in fig.I of the drawing accompanying this specification a leather washer (1) is used to control the movement of flow of fluid. In a check valve as shown in fig.2 of the drawings accompanying this specification a vertical bolt (1) moving through a cross-bar (2) is used to control the flow of fluid. From practical experience it is seen that the leather washer of the foot valve has to be replaced periodically because it is damaged due to the constant contact with water, On the other hand, the check valve does not work properly when the vertical bolt deviates from its alignment. The object of the present invention is to provide an improved non-return valve useful for controlling the flow of fluids which obviates the abovenoted drawbacks of the hitherto known non-return valves. In fig-3 of the drawings a sectional view of the non-return valve of the present invention is depicted. The main parts of the valve are a barrel nipple (1), an adapter (2) and a pin (3) as shown in fig.3 of the drawings. The barrel nipple has a blind flange (4) at the liquid discharge end. The blind flange has a collar (5) with machined surface so that it can sit properly on the seat (6) of the adapter to prevent leakage of the liquid when the valve is in closed position. The barrel nipple also has circumferential holes (7) at the flange end for discharge of the liquid when the valve remains open. The adapter (2) has a central hole all through to accommodate the barrel nipple through which the liquid will be moving. Both ends of the adapter will have threads to fit the required mating parts. The surface of the barrel nipple is machined so as to allow it free co-axial movement along the valve. The barrel nipple has a pin (3) at the suction side for locking it with the adapter so that the barrel nipple does not go out of the adapter due to the suction force acting on it. Accordingly, the present invention provides an improved non-return valve useful for controlling the flow of fluids, which comprises a barrel nipple (1) having a blind flange (4) at the top end, characterized in that the said blind flange (4) being provided with a collar(5) having smooth surface so that it can sit properly on seat (6) of an adapter (2) which allows free movement of the barrel nipple encased in it, the said barrel nipple being provided with a plurality of circumferential holes below the blind flange(4) for passage of fluid, a pin (3) being provided at the open bottom end of the said barrel nipple to prevent it from going out of the adapter, the said adapter being provided with external threading at both ends for connecting to a pipe line. An embodiment of the present invention is shown in fig.4 of the drawings accompanying this specification. For application of the valve, one end of the adapter of the valve is connected to the suction line (8) through a socket (9) and the other end of the adapter is connected to a strainer (10), The strainer has internal threads at the neck to connect it with the suction end of the adapter which also has matching external threads. At the time of running of water pump motor, the liquid enters through the strainer and flows through the central hole of the barrel nipple. The barrel nipple moves forward due to suction force and the circumferential holes of the barrel nipple will be open through which the liquid flows and enters the suction pipe line. The barrel nipple does not go out from the adapter on account of the locking pin (3). At the closing time, the barrel nipple moves backward to close the circumferential holes by entering into the central hole of the adapter and sitting on the seat of the adapter due to the liquid load acting on the flange of the barrel nipple and also its self load. In this way, the device of the present invention works as a non-return valve for controlling of fluid flow. Advantages of the present invention are : 1. This type of valve can be easily manufactured with available materials at reasonable cost. 2. The non-return mechanism of this valve is better than both the foot valve and check valve in point of simple construction, life longevity, perfect functioning and low cost. We claim: 1. An improved non-return valve useful for controlling the flow of fluids, which comprises a barrel nipple (1) having a blind flange (4) at the top end, characterized in that the said blind flange (4) being provided with a collar(5) having smooth surface so that it can sit properly on seat (6) of an adapter (2) which allows free movement of the barrel nipple encased in it, the said barrel nipple being provided with a plurality of circumferential holes below the blind flange(4) for passage of fluid, a pin (3) being provided at the open bottom end of the said barrel nipple to prevent it from going out of the adapter, the said adapter being provided with external threading at both ends for connecting to a pipe line. 2.An improved non-return valve useful for controlling the flow of fluids substantially as herein described with reference to fig. 3 & 4 of the drawings accompanying this specification.

Full Text

This Invention relates to an improved non-return valve useful for controlling the flow of fluids. It is particularly useful for controlling the flow of water in the suction of water pumping line.
The non-return valves being used for controlling the flow of water in water pipe line at present are of two types eg. foot valve and check valve. In a foot valve as shown in fig.I of the drawing accompanying this specification a leather washer (1) is used to control the movement of flow of fluid. In a check valve as shown in fig.2 of the drawings accompanying this specification a vertical bolt (1) moving through a cross-bar (2) is used to control the flow of fluid.
From practical experience it is seen that the leather washer of the foot valve has to be replaced periodically because it is damaged due to the constant contact with water, On the other hand, the check valve does not work properly when the vertical bolt deviates from its alignment.
The object of the present invention is to provide an improved non-return valve useful for controlling the flow of fluids which obviates the abovenoted drawbacks of the hitherto known non-return valves.
In fig-3 of the drawings a sectional view of the non-return valve of the present invention is depicted. The main parts of the valve are a barrel nipple (1), an adapter (2) and a pin (3) as shown in fig.3 of the drawings. The barrel nipple has a blind flange (4) at the liquid discharge end. The blind flange has a collar (5) with machined surface so that it can sit properly on the seat (6) of the adapter to prevent leakage of the liquid when the valve is in closed position. The barrel nipple also has circumferential holes (7) at the flange end for discharge of the liquid when the valve remains open. The adapter (2) has a central hole all through to accommodate the barrel nipple through which the liquid will be moving. Both ends of the adapter will have threads to fit the required mating parts. The surface of the barrel nipple is machined so as to allow it free co-axial movement along the valve. The barrel nipple has a pin (3) at the suction side for locking it with the adapter so that the barrel nipple does not go out of the adapter due to the suction force acting on it. Accordingly, the present invention provides an improved non-return valve useful for controlling the flow of fluids, which comprises a barrel nipple (1) having a blind flange (4) at the top end, characterized in that the said blind flange (4) being

provided with a collar(5) having smooth surface so that it can sit properly on seat (6) of an adapter (2) which allows free movement of the barrel nipple encased in it, the said barrel nipple being provided with a plurality of circumferential holes below the blind flange(4) for passage of fluid, a pin (3) being provided at the open bottom end of the said barrel nipple to prevent it from going out of the adapter, the said adapter being provided with external threading at both ends for connecting to a pipe line.
An embodiment of the present invention is shown in fig.4 of the drawings accompanying this specification. For application of the valve, one end of the adapter of the valve is connected to the suction line (8) through a socket (9) and the other end of the adapter is connected to a strainer (10), The strainer has internal threads at the neck to connect it with the suction end of the adapter which also has matching external threads.
At the time of running of water pump motor, the liquid enters through the strainer and flows through the central hole of the barrel nipple. The barrel nipple moves forward due to suction force and the circumferential holes of the barrel nipple will be open through which the liquid flows and enters the suction pipe line. The barrel nipple does not go out from the adapter on account of the locking pin (3). At the closing time, the barrel nipple moves backward to close the circumferential holes by entering into the central hole of the adapter and sitting on the seat of the adapter due to the liquid load acting on the flange of the barrel nipple and also its self load. In this way, the device of the present invention works as a non-return valve for controlling of fluid flow. Advantages of the present invention are :
1. This type of valve can be easily manufactured with available materials at reasonable cost.
2. The non-return mechanism of this valve is better than both the foot valve and check valve in point of simple construction, life longevity, perfect functioning and low cost.

We claim:
1. An improved non-return valve useful for controlling the flow of fluids, which comprises a barrel nipple (1) having a blind flange (4) at the top end, characterized in that the said blind flange (4) being provided with a collar(5) having smooth surface so that it can sit properly on seat (6) of an adapter (2) which allows free movement of the barrel nipple encased in it, the said barrel nipple being provided with a plurality of circumferential holes below the blind flange(4) for passage of fluid, a pin (3) being provided at the open bottom end of the said barrel nipple to prevent it from going out of the adapter, the said adapter being provided with external threading at both ends for connecting to a pipe line.
2.An improved non-return valve useful for controlling the flow of fluids substantially as herein described with reference to fig. 3 & 4 of the drawings accompanying this specification.

Documents:

427-del-1995-abstract.pdf

427-del-1995-claims.pdf

427-del-1995-correspondence-others.pdf

427-del-1995-correspondence-po.pdf

427-del-1995-description (complete).pdf

427-del-1995-drawings.pdf

427-del-1995-form-1.pdf

427-del-1995-form-2.pdf

427-del-1995-form-4.pdf

427-del-1995-form-9.pdf

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Patent Number

191191

Indian Patent Application Number

427/DEL/1995

PG Journal Number

40/2003

Publication Date

04-Oct-2003

Grant Date

26-Apr-2004

Date of Filing

14-Mar-1995

Name of Patentee

COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH

Applicant Address

RAFI MARG, NEW DELHI-110001 INDIA

Inventors:

#	Inventor's Name	Inventor's Address
1	SUBODH CHANDRA KALITA	REGIONAL RESEARCH LABORATORY, JORHAT 785006 ASSM,INDIA
2	BOLO RAM KALTA	REGIONAL RESEARCH LABORATORY, JORHAT 785006 ASSM,INDIA

PCT International Classification Number

F16K 21/00

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA