Housing type pipe coupling

• US 6,227,577 B1
• Filed: 12/22/1998
• Issued: 05/08/2001
• Est. Priority Date: 12/25/1997
• Status: Expired due to Term

• Current Assignee: The Victaulic Company Of Japan Limited
• Original Assignee: The Victaulic Company Of Japan Limited
• Inventors: Ikeda, Shintaro, Sakashita, Akinori
• Primary Examiner(s): NICHOLSON, ERIC K
• Application Number:
  US09/218,173
• Time in Patent Office: 868 Days
• Field of Search: 285/112, 285/373, 285/416, 285/419
• US Class Current: 285/112
• CPC Class Codes: F16L 17/04 with longitudinally split or divided sleeve
• CPC Class Codes: F16L 21/06 with a divided sleeve or ring clamping around the pipe-ends flanged joints F16L23/00; couplings of the quick-acting type F16L37/00

Abstract

Each of the semi-circular coupling segments has pipe fastening parts. One pipe fastening part has a protrusion to be in contact with the side surface of the circumferential groove of one pipe nearer to the end of the pipe in one of the end sections thereof with respect to a circumferential direction, and a protrusion to be in contact with the side surface of the circumferential groove of the pipe farther from the end of the pipe in the other end section thereof with respect to the circumferential direction. The other pipe fastening part has a protrusion to be in contact with the side surface of the circumferential groove of the pipe farther from the end of the pipe in one of the end sections thereof with respect to the circumferential direction, and a protrusion to be in contact with the side surface of the circumferential groove of the pipe nearer to the end of the pipe in the other end section thereof with respect to the circumferential direction.

Claims

1. A housing type coupling comprising:

a pair of semi-circular coupling segments each having a space for receiving end parts of two pipes each provided with a circumferential groove defined by at least a side surface nearer to the end of the pipe and a side surface farther from the end of the pipe;

a sealing elastic ring placed in the space defined by the pair of semi-circular coupling segments to create a nonleaking union between the ends of the two pies; and

fastening means for fastening together the pair of semi-circular coupling segments;

wherein each of the semi-circular coupling segments has pipe fastening parts respectively on the opposite sides of the space,

the pipe fastening parts have opposite end sections with respect to a circumferential direction, and extend radially inward into the circumferential grooves of the two pipes, respectively,

one of the pipe fastening parts of the semi-circular coupling segment has a protrusion to be in contact with the side surface of the circumferential groove of one of the pipes nearer to the end of the same pipe in one of the end sections thereof with respect to a circumferential direction, and a protrusion to be in contact with the side surface of the circumferential groove of the same pipe farther from the end of the same pipe in the other end section thereof with respect to the circumferential direction,

the other pipe fastening part of the same semi-circular coupling segment has a protrusion to be in contact with the side surface of the circumferential groove of the other pipe farther from the end of the same pipe in one of the end sections thereof with respect to the circumferential direction, and a protrusion to be in contact with the side surface of the circumferential groove of the same pipe nearer to the end of the same pipe in the other end section thereof with respect to the circumferential direction, and

the protrusion formed on the pipe fastening part having an arc shape conforming to a shape of the circumferential groove of the pipe.

2. The housing type pipe coupling according to claim 1, wherein the protrusion formed on the pipe fastening part extends continuously from one or the other end of the same pipe fastening part with respect to the circumferential direction to a position at an angular distance of about 45°

from one or the other end of the same pipe fastening part.

3. The housing type pipe coupling according to claim 2, wherein the pipe fastening part extends in a uniform slope, from an extremity at the angular distance of about 45°

of the protrusion extending continuously from one or the other end of the same pipe fastening part with respect to the circumferential direction to the position at the angular distance of about 45°

, to the latter or the former end of the same pipe fastening part with respect to the circumferential direction.

4. A housing type coupling comprising:

a pair of semi-circular coupling segments each having a space for receiving end parts of two pipes each provided with a circumferential groove defined by at least a side surface nearer to the end of the pipe and a side surface farther from the end of the pipe;

a sealing elastic ring placed in the space defined by the pair of semi-circular coupling segments to create a nonleaking union between the ends of the two pies; and

fastening means for fastening together the pair of semi-circular coupling segments;

wherein each of the semi-circular coupling segments has pipe fastening parts respectively on the opposite sides of the space,

the pipe fastening parts have opposite end sections with respect to a circumferential direction, and extend radially inward into the circumferential grooves of the two pipes, respectively,

one of the pipe fastening parts of the semi-circular coupling segment has a protrusion to be in contact with the side surface of the circumferential groove of one of the pipes nearer to the end of the same pipe in one of the end sections thereof with respect to a circumferential direction, and a protrusion to be in contact with the side surface of the circumferential groove of the same pipe farther from the end of the same pipe in the other end section thereof with respect to the circumferential direction,

the other pipe fastening part of the same semi-circular coupling segment has a protrusion to be in contact with the side surface of the circumferential groove of the other pipe farther from the end of the same pipe in one of the end sections thereof with respect to the circumferential direction, and a protrusion to be in contact with the side surface of the circumferential groove of the same pipe nearer to the end of the same pipe in the other end section thereof with respect to the circumferential direction, and

the protrusion formed on the pipe fastening part being formed by a projection element provided at an angular distance of about 45°

from one or the other end of the same pipe fastening part with respect to the circumferential direction.

5. A housing type pipe coupling comprising:

a pair of semi-circular coupling segments each having a space for receiving end parts of two pipes each provided with a circumferential rib having a side surface nearer to the end of the pipe and a side surface farther from the end of the pipe;

a sealing elastic ring placed in the space defined by the pair of semi-circular coupling segments to create a nonleaking union between the ends of the two pipes; and

fastening means for fastening together the pair of semi-circular coupling segments;

wherein each of the semi-circular coupling segments has pipe setting parts respectively on the opposite sides of the space,

the pipe setting parts have recesses for receiving the circumferential ribs of the pipes,

the recess has a pair of side surfaces having opposite end sections with respect to a circumferential direction,

the recess of one of the pipe setting parts of the semi-circular coupling segment has a protrusion to be in contact with the side surface of the circumferential rib of one of the pipes farther from the end of the same pipe in one of end sections thereof with respect to a circumferential direction, and a protrusion to be in contact with the side surface of the circumferential rib of the same pipe nearer to the end of the same pipe in the other end section thereof with respect to the circumferential direction, and

the recess of the other pipe setting part of the same circular coupling segment has a protrusion to be in contact with the side surface of the circumferential rib of the other pipe nearer to the end of the same pipe in one of the end sections thereof with respect to the circumferential direction, and a protrusion to be in contact with the side surface of the circumferential rib of the same pipe farther from the end of the same pipe in the other end section thereof with respect to the circumferential direction.

6. The housing type pipe coupling according to claim 5, wherein the protrusion formed in the recess has a circular shape conforming to a shape of the circumferential rib of the pipe.

7. The housing type pipe coupling according to claim 6, wherein the protrusion formed in the recess extends continuously from one or the other end of the same pipe setting part with respect to the circumferential direction to a position at an angular distance of about 45°

from one or the other end of the same pipe setting parts.

8. The housing type pipe coupling according to claim 7, wherein the pipe setting part extends in a uniform slope, from an extremity at the angular distance of about 45°

of the protrusion extending continuously from one or the other end of the same pipe setting part with respect to the circumferential direction to the position at the angular distance of about 45°

, to the latter or the former end of the same pipe setting part with respect to the circumferential direction.

9. The housing type pipe coupling according to claim 5, wherein the protrusion formed in the recess is formed by a projection element provided at an angular distance of about 45°

from one or the other end of the same pipe setting part with respect to the circumferential direction.

10. The housing type pipe coupling according to claim 5, wherein the pair of circular coupling segments are joined together in a socket-and-spigot joint.

11. The housing type pipe coupling according to claim 5, wherein the pipe setting part comes into contact with an outer circumference of the circumferential rib of the pipe, respectively.

12. The housing type pipe coupling according to claim 5, wherein the pipe setting part comes into contact with an outer circumference of the pipe.

13. A housing type coupling comprising:

a pair of semi-circular coupling segments each having a space for receiving end parts of two pipes each provided with a circumferential groove defined by at least a side surface nearer to the end of the pipe and a side surface farther from the end of the pipe;

a sealing elastic ring placed in the space defined by the pair of semi-circular coupling segments to create a nonleaking union between the ends of the two pies; and

fastening means for fastening together the pair of semi-circular coupling segments;

wherein each of the semi-circular coupling segments has pipe fastening parts respectively on the opposite sides of the space,

the pipe fastening parts have opposite end sections with respect to a circumferential direction, and extend radially inward into the circumferential grooves of the two pipes, respectively,

one of the pipe fastening parts of the semi-circular coupling segment has a protrusion to be in contact with the side surface of the circumferential groove of one of the pipes nearer to the end of the same pipe in one of the end sections thereof with respect to a circumferential direction, and a protrusion to be in contact with the side surface of the circumferential groove of the same pipe farther from the end of the same pipe in the other end section thereof with respect to the circumferential direction,

the other pipe fastening part of the same semi-circular coupling segment has a protrusion to be in contact with the side surface of the circumferential groove of the other pipe farther from the end of the same pipe in one of the end sections thereof with respect to the circumferential direction, and a protrusion to be in contact with the side surface of the circumferential groove of the same pipe nearer to the end of the same pipe in the other end section thereof with respect to the circumferential direction, and

the pair of semi-circular coupling segments being joined together in a socket-and-spigot joint,

each of the semi-circular coupling segments having a pair of circumferential end surfaces, each of which includes a convex joining part in one half area of the circumferential end surface with respect to a width of the segment and a concave joining part in the other half area of the circumferential end surface, so that the convex joining part and the concave joining part of one segment engages with the concave joining part and the convex joining part of the other segment respectively.

14. A housing type coupling comprising:

a pair of semi-circular coupling segments each having a space for receiving end parts of two pipes each provided with a circumferential groove defined by at least a side surface nearer to the end of the pipe and a side surface farther from the end of the pipe;

a sealing elastic ring placed in the space defined by the pair of semi-circular coupling segments to create a nonleaking union between the ends of the two pies; and

fastening means for fastening together the pair of semi-circular coupling segments;

wherein each of the semi-circular coupling segments has pipe fastening parts respectively on the opposite sides of the space,

the pipe fastening parts have opposite end sections with respect to a circumferential direction, and extend radially inward into the circumferential grooves of the two pipes, respectively,

one of the pipe fastening parts of the semi-circular coupling segment has a protrusion to be in contact with the side surface of the circumferential groove of one of the pipes nearer to the end of the same pipe in one of the end sections thereof with respect to a circumferential direction, and a protrusion to be in contact with the side surface of the circumferential groove of the same pipe farther from the end of the same pipe in the other end section thereof with respect to the circumferential direction,

the other pipe fastening part of the same semi-circular coupling segment has a protrusion to be in contact with the side surface of the circumferential groove of the other pipe farther from the end of the same pipe in one of the end sections thereof with respect to the circumferential direction, and a protrusion to be in contact with the side surface of the circumferential groove of the same pipe nearer to the end of the same pipe in the other end section thereof with respect to the circumferential direction, and

the pair of semi-circular coupling segments being joined together in a socket-and-spigot joint,

each of the semi-circular coupling segments having a pair of circumferential end surfaces, one of which has a convex joining part, the other of which has a concave joining part, so that the convex joining part and the concave joining part of one segment engages with the concave joining part and the convex joining part of the other segment respectively.

15. A housing type coupling comprising:

a pair of semi-circular coupling segments each having a space for receiving end parts of two pipes each provided with a circumferential groove defined by at least a side surface nearer to the end of the pipe and a side surface farther from the end of the pipe;

a sealing elastic ring placed in the space defined by the pair of semi-circular coupling segments to create a nonleaking union between the ends of the two pies; and

fastening means for fastening together the pair of semi-circular coupling segments;

wherein each of the semi-circular coupling segments has pipe fastening parts respectively on the opposite sides of the space,

the pipe fastening parts have opposite end sections with respect to a circumferential direction, and extend radially inward into the circumferential grooves of the two pipes, respectively,

one of the pipe fastening parts of the semi-circular coupling segment has a protrusion to be in contact with the side surface of the circumferential groove of one of the pipes nearer to the end of the same pipe in one of the end sections thereof with respect to a circumferential direction, and a protrusion to be in contact with the side surface of the circumferential groove of the same pipe farther from the end of the same pipe in the other end section thereof with respect to the circumferential direction,

the other pipe fastening part of the same semi-circular coupling segment has a protrusion to be in contact with the side surface of the circumferential groove of the other pipe farther from the end of the same pipe in one of the end sections thereof with respect to the circumferential direction, and a protrusion to be in contact with the side surface of the circumferential groove of the same pipe nearer to the end of the same pipe in the other end section thereof with respect to the circumferential direction, and

each of the semi-circular coupling segments has engaging means, and the engaging means are consisted by a convex joining part formed at a portion on the side of the one pipe fastening part and the side of the other end section thereof with respect to the circumferential direction, a convex joining part formed at a portion on the side of the other pipe fastening part and the side of the one end section thereof with respect to the circumferential direction, a concave joining part formed at a portion on the side of the one pipe fastening part and the side of the one end section thereof with respect to the circumferential direction, and a concave joining part formed at a portion on the side of the other pipe fastening part and the side of the other end section thereof with respect to the circumferential direction.

16. The housing type pipe coupling according to claim 15, wherein the protrusion formed on the pipe fastening part has an arc shape conforming to a shape of the circumferential groove of the pipe.

17. The housing type pipe coupling according to claim 16, wherein the protrusion formed on the pipe fastening part extends continuously from one or the other end of the same pipe fastening part with respect to the circumferential direction to a position at an angular distance of about 45°

from one or the other end of the same pipe fastening part.

18. The housing type pipe coupling according to claim 15, wherein the protrusion formed on the pipe fastening part is formed by a projection elements provided at an angular distance of about 45°

from one or the other end of the same pipe fastening part with respect to the circumferential direction.

19. The housing type pipe coupling according to claim 15, wherein the convex joining parts and the concave joining parts have essentially the same width.

20. A housing type coupling comprising:

a pair of semi-circular coupling segments each having a space for receiving end parts of two pipes each provided with a circumferential rib having a side surface nearer to the end of the pipe and a side surface farther from the end of the pipe;

a sealing elastic ring placed in the space defined by the pair of semi-circular coupling segments to create a nonleaking union between the ends of the two pies; and

fastening means for fastening together the pair of semi-circular coupling segments;

wherein each of the semi-circular coupling segments has pipe setting parts respectively on the opposite sides of the space,

the pipe setting parts have recesses for receiving the circumferential ribs of the pipes,

the recess has a pair of side surfaces having opposite end sections with respect to a circumferential direction,

the recess of one of the pipe setting parts of the semi-circular coupling segment has a protrusion to be in contact with the side surface of the circumferential rib of one of the pipes farther from the end of the same pipe in one of end sections thereof with respect to a circumferential direction, and a protrusion to be in contact with the side surface of the circumferential rib of the same pipe nearer to the end of the same pipe in the other end section thereof with respect to the circumferential direction,

the recess of the other pipe setting part of the same circular coupling segment has a protrusion to be in contact with the side surface of the circumferential rib of the other pipe nearer to the end of the same pipe in one of the end sections thereof with respect to the circumferential direction, and a protrusion to be in contact with the side surface of the circumferential rib of the same pipe farther from the end of the same pipe in the other end section thereof with respect to the circumferential direction, and

each of the semi-circular coupling segments has engaging means, and the engaging means are consisted by a convex joining part formed at a portion on the side of the one pipe fastening part and the side of the other end section thereof with respect to the circumferential direction, a convex joining part formed at a portion on the side of the other pipe fastening part and the side of the one end section thereof with respect to the circumferential direction, a concave joining part formed at a portion on the side of the one pipe fastening part and the side of the one end section thereof with respect to the circumferential direction, and a concave joining part formed at a portion on the side of the other pipe fastening part and the side of the other end section thereof with respect to the circumferential direction.

21. The housing type pipe coupling according to claim 20, wherein the protrusion formed in the recess has an arc shape conforming to a shape of the circumferential rib of the pipe.

22. The housing type pipe coupling according to claim 21, wherein the protrusion formed in the recess extends continuously from one or the other end of the same pipe setting part with respect to the circumferential direction to a position at an angular distance of about 45°

from one or the other end of the same pipe setting parts.

23. The housing type pipe coupling according to claim 20, wherein the protrusion formed in the recess is formed by a projection element provided at an angular distance of about 45°

from one or the other end of the same pipe setting part with respect to the circumferential direction.

24. The housing type pipe coupling according to claim 20, wherein the convex joining parts and the concave joining parts have essentially the same width.

25. A semi-circular coupling segment having a space for receiving a sealing elastic ring and end parts of two pipes each provided with a circumferential groove defined by at least a side surface nearer to the end of the pipe and a side surface farther from the end of the pipe, comprising:

pipe fastening parts arranged respectively on the opposite sides of the space; and

engaging means;

wherein the pipe fastening parts have opposite end sections with respect to a circumferential direction, and extend radially inward into the circumferential grooves of the two pipes, respectively,

one of the pipe fastening parts of the semi-circular coupling segment has a protrusion to be in contact with the side surface of the circumferential groove of one of the pipes nearer to the end of the same pipe in one of the end sections thereof with respect to a circumferential direction, and a protrusion to be in contact with the side surface of the circumferential groove of the same pipe farther from the end of the same pipe in the other end section thereof with respect to the circumferential direction,

the other pipe fastening part of the same semi-circular coupling segment has a protrusion to be in contact with the side surface of the circumferential groove of the other pipe farther from the end of the same pipe in one of the end sections thereof with respect to the circumferential direction, and a protrusion to be in contact with the side surface of the circumferential groove of the same pipe nearer to the end of the same pipe in the other end section thereof with respect to the circumferential direction, and

the engaging means are consisted by a convex joining part formed at a portion on the side of the one pipe fastening part and the side of the other end section thereof with respect to the circumferential direction, a convex joining part formed at a portion on the side of the other pipe fastening part and the side of the other end section thereof with respect to the circumferential direction, a concave joining part formed at a portion on the side of the one pipe fastening part and the side of the one end section thereof with respect to the circumferential direction, and a concave joining part formed at a portion on the side of the other pipe fastening part and the side of the other end section thereof with respect to the circumferential direction.

26. A semi-circular coupling segment each having a space for receiving a sealing elastic ring and end parts of two pipes each provided with a circumferential rib having a side surface nearer to the end of the pipe and a side surface farther from the end of the pipe, comprising:

pipe setting parts arranged respectively on the opposite sides of the space; and

engaging means;

wherein the pipe setting parts have recesses for receiving the circumferential ribs of the pipes,

the recess has a pair of side surfaces having opposite end sections with respect to a circumferential direction, the recess of one of the pipe setting parts of the semi-circular coupling segment has a protrusion to be in contact with the side surface of the circumferential rib of one of the pipes farther from the end of the same pipe in one of end sections thereof with respect to a circumferential direction, and a protrusion to be in contact with the side surface of the circumferential rib of the same pipe nearer to the end of the same pipe in the other end section thereof with respect to the circumferential direction,

the recess of the other pipe setting part of the same semi-circular coupling segment has a protrusion to be in contact with the side surface of the circumferential rib of the other pipe nearer to the end of the same pipe in one of the end sections thereof with respect to the circumferential direction, and a protrusions to be in contact with the side surface of the circumferential rib of the same pipe farther from the end of the same pipe in the other end section thereof with respect to the circumferential direction, and

the engaging means are consisted by a convex joining part formed at a portion on the side of the one pipe fastening part and the side of the other end section thereof with respect to the circumferential direction, a convex joining part formed at a portion on the side of the other pipe fastening part and the side of the one end section thereof with respect to the circumferential direction, a concave joining part formed at a portion on the side of the one pipe fastening part and the side of the one end section thereof with respect to the circumferential direction, and a concave joining part formed at a portion on the side of the other pipe fastening part and the side of the other end section thereof with respect to the circumferential direction.