Threaded pipe joint coupling with wire lock device

• US 8,246,084 B2
• Filed: 05/28/2004
• Issued: 08/21/2012
• Est. Priority Date: 05/28/2004
• Status: Expired due to Fees

• Current Assignee: Ashirvad Pipes Private Limited
• Original Assignee: Ashirvad Pipes Pvt. Ltd. (Aliaxis SA)
• Inventors: Poddar, Deepak
• Primary Examiner(s): Dunwoody, Aaron
• Assistant Examiner(s): KEE, FANNIE C
• Application Number:
  US11/569,591
• Publication Number:
  US 20080067808A1
• Time in Patent Office: 3,007 Days
• Field of Search: 285/39, 285/305, 285/308, 285/321, 285333-334
• US Class Current: 285/308
• CPC Class Codes: F16L 15/08 with supplementary elements F16L15/04, F16L41/00 and F16L43/02 take precedence
• CPC Class Codes: F16L 37/148 the securing element being flexible F16L37/144 takes precedence
• CPC Class Codes: F16L 47/16 Screw-threaded joints

Abstract

A threaded pipe (11) and coupler (5) made of polyvinyl chloride, the coupler (5) comprising two coupling ends having inner square-shaped threading (3, 14), each receiving a pipe end (4, 11) having an outer square-shaped threading, a sealing ring (2, 13) being provided between each coupling end of an inner surface of the coupler (5) and an outer surface of the corresponding pipe end (4, 11); a groove (10), being formed on the inner surface of the coupler (5), and co-operating with a part of the outer surface of the pipe end after the threading, when the pipe (11) is threadingly coupled in the coupler (5), to form a tangential hole (42) between the outer surface of the pipe (11) and the inner surface of the coupler (5) with the groove made on the outer surface of the coupler aligning with a groove of first pipe, wherein a wire lock (41) is inserted in the tangential hole (42) to lock the coupling of the coupler (5) with the end of the pipe (11).

Claims

1. A threaded pipes and coupler system, said system comprising:

a coupler made of polyvinyl chloride comprising;

a permanent coupling end and a temporary coupling end, wherein the permanent coupling end and the temporary coupling end are configured with square-shaped threads on inner surfaces thereof;

a groove for accommodating a wire lock, wherein the groove is provided on the inner surface of the coupler at the permanent coupling end;

a tangential hole drilled at the permanent coupling end from an outer surface of the coupler to the inner surface of the coupler to meet the groove provided on the coupler for accommodating the wire lock;

an inner sealing ring groove provided proximate to a middle portion of the coupler towards the permanent coupling end; and

a milled groove provided on the outer surface of the coupler and located at the permanent coupling end of the coupler, wherein the milled groove and the groove for accommodating the wire lock are located adjacent to each other at the permanent coupling end of the coupler;

a first pipe and a second pipe, each made of polyvinyl chloride and comprising square-shaped threads on an outer surface and a groove located at an end of the square-shaped threads and on the outer surface of each of the pipes, wherein the first pipe is connected to the permanent coupling end of the coupler and the second pipe is connected to the temporary coupling end of the coupler;

an inner sealing ring provided at the inner sealing ring groove of the coupler; and

a wire lock, wherein the wire lock is inserted into the tangential hole and passed through a circumferential passage formed by matching the groove made on the coupler with the groove made on the outer surface of the first pipe after complete threading of the first pipe with the coupler for accommodating the wire lock to lock the coupler and the first pipe to form a permanent joint.

2. The threaded pipes and coupler system of claim 1, wherein a cross section of the wire lock is of a shape selected from a group comprising round, oval, square and sides flattened.

3. The threaded pipes and coupler system of claim 2, wherein the wire lock comprises at least one of metal, rubber and plastic.

4. The threaded pipes and coupler system of claim 2, wherein the groove on the outer surface of the first pipe is longer than the groove on the inner surface of the coupler.

5. The threaded pipes and coupler system of claim 2, wherein a sealing ring is provided in the groove of the second pipe.

6. The threaded pipes and coupler system of claim 2, wherein the first pipe further comprises a non-threaded portion thereof which is machined to form a seat for the coupler inner sealing ring.

7. The threaded pipes and coupler system of claim 1, wherein the wire lock comprises at least one of metal, rubber and plastic.

8. The threaded pipes and coupler system of claim 7, wherein the groove on the outer surface of the first pipe is longer than the groove on the inner surface of the coupler.

9. The threaded pipes and coupler system of claim 7, wherein a sealing ring is provided in the groove of the second pipe.

10. The threaded pipes and coupler system of claim 7, wherein the first pipe further comprises a non-threaded portion thereof which is machined to form a seat for the coupler inner sealing ring.

11. The threaded pipes and coupler system of claim 1, wherein the groove on the outer surface of the first pipe is longer than the groove on the inner surface of the coupler.

12. The threaded pipes and coupler system of claim 11, wherein a sealing ring is provided in the groove of the second pipe.

13. The threaded pipes and coupler system of claim 11, wherein the first pipe further comprises a non-threaded portion thereof which is machined to form a seat for the coupler inner sealing ring.

14. The threaded pipes and coupler system of claim 1, wherein a sealing ring is provided in the groove of the second pipe.

15. The threaded pipes and coupler system of claim 14, wherein the first pipe further comprises a non-threaded portion thereof which is machined to form a seat for the coupler inner sealing ring.

16. The threaded pipes and coupler system of claim 1, wherein the first pipe further comprises a non-threaded portion thereof which is machined to form a seat for the coupler inner sealing ring.