GB1595728A - Stop cocks - Google Patents

Description

(54) IMPROVEMENTS IN OR RELATING TO STOP COCKS (71) I, SHEN-YEN LIU, of 35, Lane 92, Min-Chuan Road, Tan-Shui, Taipei Hsien, Taiwan, Republic of China, a citizen of Taiwan do hereby declare the invention, for which I pray that a patent may be granted to me, and the method by which it is to be performed, to be particularly described in and by the following statement: The invention relates to stop cocks.

The invention provides a stop cock comprising a casing arranged for mounting on a supply pipe, a valve slidably arranged within the casing, the valve comprising a guide rim slidably engaging the inner periphery of the casing and a central valve member supported by a plurality of support legs projecting radially inwardly from the guide rim, a valve seat arranged with respect to the valve member such that when the stop cock is mounted on a supply pipe, any pressure within the pipe will tend to force the valve member against the valve seat to close the cock, a spring arranged with the casing to urge the valve member against the valve seat, and a sleeve member connectable to the casing so as to move the valve in a direction to force the valve member away from the valve seat against the action of the spring and any pressure within the supply pipe so that when the sleeve member is connected to the casing any fliud within the supply pipe flows around the valve member and between the support legs into the sleeve member.

The sleeve member preferably comprises an end of a curved or elbow-shaped pipe, the outlet end of the pipe being substantially at right angles to the sleeve member and the sleeve member being connectable to the casing by a union nut which permits the sleeve member to be rotated through any desired angle with respect to the casing.

The central valve member is preferably supported by three support legs.

By way of example, a specific embodiment of the invention will now be described, with reference to the accompanying drawings, in which: Figure 1 is a schematic view showing a conventional stop cock mounted for use; Figure 2 is a sectional view thereof; Figure 3 is an exploded view of each part in a disassembled state; Figure 4 is a schematic view showing an embodiment of stop cock according to the present invention mounted for use; Figure 5 is a sectional view thereof; Figure 6 is an exploded view of each part in a disassembled state; and Figure 7 illustrates a plan view and a side view showing the valve of the embodiment of stop cock according to the invention.

In the prior art stop cock as illustrated in Figures 1 to 3, a plug valve 15 is threaded into a lower casing 11 (Figure 3). After an upper casing 12 has been removed, the lower casing 11 is mounted on a supply pipe 10 after a borer has been used to make a hole therein. Thereupon, the upper casing 12 is again mounted on the lower casing 11.

A union nut 13 is fitted on to a coupling pipe 14 which, in turn, is coupled to a diversion pipe 17. To open the cock the valve 15 is rotated causing it to move from the lower casing 11 to the upper casing 12, thereby allowing water to flow from the supply pipe 10 to the coupling pipe 14. A nut 16 is secured to the top of the upper casing 12 so that leakage of water from the upper casing 12 is avoided. References 18 and 19 each are rubber packings. Such a conventional method requires a number of parts for the stop cock and takes a considerable time for assembling them; hence, it is uneconomical. In addition, it is relatively likely that leakage will take place due to the presence of many jointed portions.

Reference will now be made to Figures 4 to 7, showing the embodiment of stop cock according to the invention.

A valve 22 and a spring 23 (made of phosphor bronze) are provided inside a casing 21, such that, when the casing 21 is mounted on a supply pipe 20 of cast iron, the valve 22 is forced up due to the elastic force of the spring 23 and the water pressure from the supply pipe 20 engages a valve seat and hence closes the outlet of the casing 21, whereby no water escapes to the outside.

The valve 22 comprises a guide rim slid ably arranged within the casing 21, and a central valve member which is supported by three legs extending radially inwardly from the rim.

A method for setting up the stop cock according to the present invention involves mounting the casing 21 on the supply pipe 20 after boring a hole in the supply pipe with the aid of a borer. In this case, the valve 22 is forced up due to the elastic force of the spring 23 and the water pressure from the supply pipe to close the outlet of the casing, so that no water escapes to the outside.

Thereupon, a union nut 24 is fitted on to a curved pipe 25 which, in turn, is coupled to a diversion pipe 26. To open the cock the curved pipe 25 is mounted and secured to the casing 21 through a rubber packing 27 by means of the nut 24. A sleeve portion 30 below the curved pipe 25 causes the guide rim of the valve to be forced down so that the entire valve 22 descends to open the closed outlet of the casing 21, whereby the water in the supply pipe 20 is introduced into the diversion pipe 26. Figure 5 is a sectional view showing a state where mounting of the cock for use is completed, while Figure 4 is a schematic view thereof. In Figure 7, illustrated are a plan view (a) and a side view (b) showing the valve 22.

Thus with the stop cock according to the present invention operation can be continued without stopping the water supply.

Further, the cock has a reduced number of parts and is simple in structure. Mounting of the stop cock is completed within several minutes in comparison with the prior art stop cock taking 20 or more minutes for initial mounting; hence, the present cock can be utilised very economically. Due to a lesser number of jointed portions of parts, leakage of water is limited in coupling them while the rate of leakage is remarkably reduced in operation. In addition, since the curved pipe is permitted to turn in 360 degrees, water intake is made possible regardless of geographical features, thus facilitating operation.

WHAT I CLAIM IS: 1. A stop cock comprising a casing arranged for mounting on a supply pipe, a valve slidably arranged within the casing, the valve comprising a guide rim slidably engaging the inner periphery of the casing and a central valve member supported by a plurality of support legs projecting radially inwardly from the guide rim, a valve seat arranged with respect to the valve member such that when the stop cock is mounted on a supply pipe, any pressure within the pipe will tend to force the valve member against the valve seat to close the cock, a spring arranged with the casing to urge the valve member against the valve seat, and a sleeve member connectable to the casing so as to move the valve in a direction to force the valve member away from the valve seat against the action of the spring and any pressure within the supply pipe so that when the sleeve member is connected to the casing any fluid within the supply pipe flows around the valve member and between the support legs into the sleeve member.

2. A stop cock as claimed in Claim 1, in which the sleeve member comprises an end of a curved or elbow-shaped pipe, the outlet end of the pipe being substantially at right angles to the sleeve member and the sleeve member being connectable to the casing by a union nut which permits the sleeve member to be rotated through any desired angle with respect to the casing.

3. A stop cock as claimed in Claim 1 or Claim 2, in which there are three support legs.

4. A stop cock constructed and arranged substantially as herewith described, with reference to Figures 4 to 6 of the accompanying drawings.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (4)

**WARNING** start of CLMS field may overlap end of DESC **. ably arranged within the casing 21, and a central valve member which is supported by three legs extending radially inwardly from the rim. A method for setting up the stop cock according to the present invention involves mounting the casing 21 on the supply pipe 20 after boring a hole in the supply pipe with the aid of a borer. In this case, the valve 22 is forced up due to the elastic force of the spring 23 and the water pressure from the supply pipe to close the outlet of the casing, so that no water escapes to the outside. Thereupon, a union nut 24 is fitted on to a curved pipe 25 which, in turn, is coupled to a diversion pipe 26. To open the cock the curved pipe 25 is mounted and secured to the casing 21 through a rubber packing 27 by means of the nut 24. A sleeve portion 30 below the curved pipe 25 causes the guide rim of the valve to be forced down so that the entire valve 22 descends to open the closed outlet of the casing 21, whereby the water in the supply pipe 20 is introduced into the diversion pipe 26. Figure 5 is a sectional view showing a state where mounting of the cock for use is completed, while Figure 4 is a schematic view thereof. In Figure 7, illustrated are a plan view (a) and a side view (b) showing the valve 22. Thus with the stop cock according to the present invention operation can be continued without stopping the water supply. Further, the cock has a reduced number of parts and is simple in structure. Mounting of the stop cock is completed within several minutes in comparison with the prior art stop cock taking 20 or more minutes for initial mounting; hence, the present cock can be utilised very economically. Due to a lesser number of jointed portions of parts, leakage of water is limited in coupling them while the rate of leakage is remarkably reduced in operation. In addition, since the curved pipe is permitted to turn in 360 degrees, water intake is made possible regardless of geographical features, thus facilitating operation. WHAT I CLAIM IS:

1. A stop cock comprising a casing arranged for mounting on a supply pipe, a valve slidably arranged within the casing, the valve comprising a guide rim slidably engaging the inner periphery of the casing and a central valve member supported by a plurality of support legs projecting radially inwardly from the guide rim, a valve seat arranged with respect to the valve member such that when the stop cock is mounted on a supply pipe, any pressure within the pipe will tend to force the valve member against the valve seat to close the cock, a spring arranged with the casing to urge the valve member against the valve seat, and a sleeve member connectable to the casing so as to move the valve in a direction to force the valve member away from the valve seat against the action of the spring and any pressure within the supply pipe so that when the sleeve member is connected to the casing any fluid within the supply pipe flows around the valve member and between the support legs into the sleeve member.

2. A stop cock as claimed in Claim 1, in which the sleeve member comprises an end of a curved or elbow-shaped pipe, the outlet end of the pipe being substantially at right angles to the sleeve member and the sleeve member being connectable to the casing by a union nut which permits the sleeve member to be rotated through any desired angle with respect to the casing.

3. A stop cock as claimed in Claim 1 or Claim 2, in which there are three support legs.

4. A stop cock constructed and arranged substantially as herewith described, with reference to Figures 4 to 6 of the accompanying drawings.