Coupling

Abstract

A pipe connector has two segments with lugs adapted to receive adjustable fasteners to pull the segments together to connect pipe elements. Each lug has a spaced-apart inner surface and a stop surface. When the adjustable fastener is tightened, the stop surfaces on the corresponding lugs come into contact with each other.

Description

(19) State Intellectual Property Office (12) Invention Patent Application (10) Application Publication Number (43) Application Publication Date (21) Application Number 202480064627.5 (22) Application Date 2024.09.17 (30) Priority Data 63 / 589060 2023.10.10 US (85) PCT International Application Entering National Phase Date 2026.04.08 (86) PCT International Application Application Data PCT / US2024 / 047067 2024.09.17 (87) PCT International Application Publication Data WO2025 / 080380 EN 2025.04.17 (71) Applicant: Vitley Corporation Address: Pennsylvania, USA (72) Inventors: M.A. Bowman, C.A. Richard (74) Patent Agency: China Patent Agency (Hong Kong) Limited 72001 Patent Attorney Shi Hongyu Hou Yunzhong (51) Int.Cl. F16L 17 / 04 (2006.01) F16L 23 / 02 (2006.01) F16L 19 / 02 (2006.01) (54) Invention Title: Connector (57) Abstract: A pipe connector has two segments with lugs adapted to receive adjustable fasteners to pull the segments together to connect pipe elements. Each lug has spaced-apart inner surfaces and stop surfaces. When the adjustable fasteners are tightened, the stop surfaces on the corresponding lugs contact each other.Claims 5 pages, Description 14 pages, Drawings 21 pages, CN 121986231 A 2026.05.05 CN 1 21 98 62 31 A 1. A connector for connecting a tubular element in an end-to-end relationship, the connector comprising: a first segment and a second segment, the first segment being attached end-to-end to each other to enclose a central space for receiving the tubular element, each segment including a first lug extending from a first end of the segment and a second lug extending from a second end of the segment; a first adjustable fastener and a second adjustable fastener, the first adjustable fastener extending along a first longitudinal axis between the first lugs, the second adjustable fastener extending along a second longitudinal axis between the second lugs; wherein each segment further includes: a first inner surface positioned between the central space and the first lugs, the first inner surface including a first tooth and a first recess; a first stop surface positioned on the first lugs, the first adjustable fastener being positioned between the first inner surface and the first stop surface; A second inner surface, positioned between the central space and the second lug, includes a second tooth and a second recess; and a second stop surface positioned on the second lug, with a second adjustable fastener positioned between the second inner surface and the second stop surface; wherein the first segment and the second segment are movable toward each other to a tightened state; the first and second adjustable fasteners are configured to pull the first segment and the second segment toward each other to the tightened state; and wherein in the tightened state: the first stop surface at the first end of the segment engages, and the second stop surface at the second end of the segment engages; and the first tooth of the first segment is at least partially received within the first recess of the second segment, and the first tooth of the second segment is at least partially received within the first recess of the first segment. 2. The connector of claim 1, wherein, in the tightened state, the second tooth of the first segment engages with the second recess of the second segment, and the second recess of the first segment engages with the second tooth of the second segment. 3. The connector of claim 1, wherein, in the tightened state, a first gap exists between the first stop surfaces. 4. The connector of claim 3, wherein, in the tightened state, a second gap exists between the second inner surfaces. 5. The connector of claim 1, wherein the first lug defines a first opening that surrounds a first axis oriented perpendicular to the first longitudinal axis of the first adjustable fastener and is positioned between the first inner surface and the first stop surface.6. The connector of claim 5, wherein the first opening extends through the first lug. 7. The connector of claim 5, wherein the second lug defines a second opening that surrounds a second axis oriented perpendicular to the second longitudinal axis of the second adjustable fastener and is positioned between the second inner surface and the second stop surface. 8. The connector of claim 7, wherein the second opening extends through the second lug. 9. The connector of claim 1, wherein: the first tooth of the first segment is aligned with the first recess of the second segment, and the first recess of the first segment is aligned with the first tooth of the second segment. 10. The connector of claim 1, wherein the surface of the first tooth is oriented at a first angle relative to a first plane, the first plane comprising a transverse axis and the first axis and the second axis, the transverse axis being oriented perpendicular to the first longitudinal axis and the second longitudinal axis and the first axis and the second axis, and wherein the surface of the first recess is oriented at a second angle relative to the first plane. 11. The connector of claim 10, wherein the second angle has a slope opposite to the first angle. 12. The connector of claim 11, wherein the magnitude of the second angle is substantially the same as the magnitude of the first angle. 13. The connector of claim 11, wherein the slope of the first angle is in the range of 10° to 70°, and the slope of the second angle is in the range of 10° to 70°. 14. The connector of claim 1, wherein: the second tooth of the first segment is aligned with the second recess of the second segment, and the second recess of the first segment is aligned with the second tooth of the second segment. 15. The connector of claim 1, wherein the surface of the second tooth is oriented at a third angle relative to the first plane, and the surface of the second recess is oriented at a fourth angle relative to the first plane. 16. The connector of claim 15, wherein the third angle has a slope equal to and opposite to the first angle, and the fourth angle has a slope equal to and opposite to the second angle. 17. The connector of claim 13, further comprising: a first pair of shoulders positioned adjacent to the first tooth and the first recess, each of the first pair of shoulders having a first shoulder surface; and a second pair of shoulders positioned adjacent to the second tooth and the second recess, each of the second pair of shoulders having a second shoulder surface.18. The connector of claim 17, wherein the first shoulder surface is oriented substantially parallel to the first plane, and the second shoulder surface is oriented substantially parallel to the first plane. 19. The connector of claim 1, wherein the first stop surface includes a first portion oriented at a fifth angle relative to a second plane, the second plane including the first longitudinal axis, the second longitudinal axis, and the transverse axis, wherein the second stop surface includes a first portion oriented at a sixth angle relative to the second plane. 20. The connector of claim 19, wherein the sixth angle has a slope equal to and opposite to the fifth angle. 21. The connector of claim 20, wherein the first stop surface further includes at least one second portion oriented at a seventh angle relative to the second plane, and the second stop surface includes at least one second portion oriented at an eighth angle relative to the second plane. 22. The connector of claim 21, wherein the eighth angle has a slope equal to and opposite to the seventh angle. 23. The connector of claim 21, wherein the seventh angle has a slope opposite to that of the fifth angle, and the eighth angle has a slope opposite to that of the sixth angle. 24. The connector of claim 1, wherein each of the first adjustable fastener and the second adjustable fastener comprises a nut and a bolt. 25. The connector of claim 1, wherein each of the segments comprises a first arcuate protrusion and a second arcuate protrusion positioned on opposite sides of the segment, each of the first arcuate protrusion and the second arcuate protrusion facing the central space, and each of the first arcuate protrusion and the second arcuate protrusion being capable of engaging within a circumferential groove in the tube element when the segments are pulled toward each other by the first adjustable fastener and the second adjustable fastener. 26. The connector of claim 1, further comprising a seal positioned within the central space, the seal supporting the segments in a spaced-apart relationship sufficient to allow the tube element to be inserted into the central space without disassembling the connector. 27. A method of using the connector according to claim 1, the method comprising: adjusting a first adjustable fastener to pull a first segment and a second segment toward each other; engaging a first stop surface at a first end of the segment; adjusting a second adjustable fastener to pull the first segment and the second segment toward each other; and engaging a second stop surface at a second end of the segment.28. The method of claim 27, wherein the first stop surface engages at the first end of the segment before adjusting the second adjustable fastener. 29. The method of claim 28, wherein the connector is in the tightened state after the second stop surface engages. 30. The method of claim 29, wherein the first segment and the second segment are aligned relative to an axis parallel to and centered between the first and second longitudinal axes, and the alignment is maintained in the tightened state. 31. A connector for connecting a tubular element end-to-end, the connector comprising: a first segment and a second segment attached end-to-end to each other to enclose a central space for receiving the tubular element, each segment including a first end and a second end, each segment including a first lug extending from its first end; a first adjustable fastener extending along a first longitudinal axis between the first lugs; and a hinge assembly attached to the second ends of the first segment and the second segment; wherein each segment further comprises: a first inner surface positioned between the central space and the first lug, the first inner surface including a first tooth and a first recess; and a first stop surface positioned on the first lug, the first adjustable fastener positioned between the first inner surface and the first stop surface; wherein the first segment and the second segment are movable toward each other to a tightened state; the first adjustable fastener is configured to pull the first segment and the second segment toward each other to the tightened state; and wherein in the tightened state: the first stop surface at the first end of the segment engages, and claim 3 / 5 Page 4 CN 121986231 A The first tooth of the first segment is at least partially received within the first recess of the second segment, and the first tooth of the second segment is at least partially received within the first recess of the first segment. 32. The connector of claim 31, wherein, in the tightened state, a first gap exists between the first stop surfaces. 33. The connector of claim 31, wherein the first lug defines a first opening that surrounds a first axis oriented perpendicular to the first longitudinal axis of the first adjustable fastener and is positioned between the first inner surface and the first stop surface. 34. The connector of claim 33, wherein the first opening extends through the first lug.35. The connector of claim 31, wherein: the first tooth of the first segment is aligned with the first recess of the second segment, and the first recess of the first segment is aligned with the first tooth of the second segment. 36. The connector of claim 31, wherein the surface of the first tooth is oriented at a first angle relative to a first plane, the first plane comprising a transverse axis and the first axis and the second axis, the transverse axis being oriented perpendicular to the first longitudinal axis and the second longitudinal axis and the first axis and the second axis, and wherein the surface of the first recess is oriented at a second angle relative to the first plane. 37. The connector of claim 36, wherein the second angle has a slope opposite to the first angle. 38. The connector of claim 37, wherein the magnitude of the second angle is substantially the same as the magnitude of the first angle. 39. The connector of claim 37, wherein the slope of the first angle is in the range of 10° to 70°, and the slope of the second angle is in the range of 10° to 70°. 40. The connector of claim 31, further comprising: a first pair of shoulders positioned adjacent to the first tooth and the first recess, each of the first pair of shoulders having a first shoulder surface. 41. The connector of claim 40, wherein the first shoulder surface is oriented substantially parallel to the first plane. 42. The connector of claim 31, wherein the first stop surface includes a first portion oriented at a fifth angle relative to a second plane, the second plane including the first longitudinal axis, the second longitudinal axis, and the transverse axis. 43. The connector of claim 42, wherein the first stop surface further includes at least one second portion oriented at a seventh angle relative to the second plane. 44. The connector of claim 42, wherein the seventh angle has a slope opposite to the fifth angle. 45. The connector of claim 31, wherein the first adjustable fastener includes a nut and a bolt. 46. ​​The connector of claim 31, wherein each of the segments includes a first arcuate protrusion and a second arcuate protrusion positioned on opposite sides of the segment, each of the first arcuate protrusion and the second arcuate protrusion facing the central space, and each of the first arcuate protrusion and the second arcuate protrusion being capable of engaging within a circumferential groove in the tubular element when the segments are pulled toward each other by the first adjustable fastener.Claims 4 / 5 pages 5 CN 121986231 A 47. The connector according to claim 31, further comprising a seal positioned within the central space, the seal supporting the segments in a spaced relationship sufficient to allow the tubular element to be inserted into the central space without disassembling the connector. Claims 5 / 5 pages 6 CN 121986231 A Connector

[0001] Cross-Reference to Related Applications This application is based on and claims priority to U.S. Provisional Application No. 63 / 589060, filed October 10, 2023, which is hereby incorporated by reference. Technical Field

[0002] The present invention relates to mechanical connectors for connecting tubular elements. Background Art

[0003] It is advantageous to install connectors having segments that can be connected to each other at one end and then at the other end. Compared to segments that are installed by gradually tightening fasteners, segments designed to be fully fastened to each other at one end and then at the other end can be installed in less time. Segments with bolt washers having external portions that contact each other when tightened reduce the possibility of overtightening and provide visual indication of complete and proper assembly. Tolerance ranges of the pipe elements and on the mating surfaces of the connector can cause gaps between segments. These gaps can expose and / or allow gaskets to bulge out. Furthermore, exposed gaskets can incorrectly indicate to the installer that the connector is not fully or properly installed. There is clearly an opportunity to improve segmented mechanical connectors to make them easier to assemble, provide consistent and clear visual indication of proper installation, and protect and properly compress the gaskets. Summary of the Invention

[0004] An example connector according to the invention for connecting pipe elements in an end-to-end relationship includes a first segment and a second segment, which are attached end-to-end to each other to enclose a central space for receiving the pipe element. Each segment includes a first lug extending from its first end and a second lug extending from its second end. A first adjustable fastener extends between the first lugs along a first longitudinal axis, and a second adjustable fastener extends between the second lugs along a second longitudinal axis. Each segment further includes a first inner surface positioned between the central space and the first lug. The first inner surface includes a first tooth and a first recess. Each segment further includes a first stop surface positioned on the first lug. A first adjustable fastener is positioned between the first inner surface and the first stop surface. Each segment further includes a second inner surface positioned between the central space and the second lug. The second inner surface includes a second tooth and a second recess. Each segment further includes a second stop surface positioned on the second lug. A second adjustable fastener is positioned between the second inner surface and the second stop surface. The first segment and the second segment are movable toward each other to a tightened state.The first and second adjustable fasteners are configured to pull the first and second segments toward each other into a tightened state. In the tightened state, a first stop surface at a first end of the segment engages and a second stop surface at a second end of the segment engages. A first tooth of the first segment is at least partially received within a first recess of the second segment, and a first tooth of the second segment is at least partially received within a first recess of the first segment.

[0005] In an example embodiment, in the tightened state, a second tooth of the first segment engages with a second recess of the second segment, and a second recess of the first segment engages with a second tooth of the second segment.

[0006] In an example embodiment, in the tightened state, a first gap exists between the first stop surfaces.

[0007] In another example embodiment, in the tightened state, a second gap exists between the second inner surfaces. Instruction manual, page 1 / 14, CN 121986231 A

[0008] In an example embodiment, a first lug defines a first opening that surrounds a first axis oriented perpendicular to a first longitudinal axis of the first adjustable fastener and is positioned between a first inner surface and a first stop surface.

[0009] In another example embodiment, the first opening extends through the first lug.

[0010] In an example embodiment, a second lug defines a second opening that surrounds a second axis oriented perpendicular to a second longitudinal axis of the second adjustable fastener and is positioned between a second inner surface and a second stop surface.

[0011] In another example embodiment, the second opening extends through the second lug.

[0012] In an example embodiment, a first tooth of a first segment aligns with a first recess of a second segment, and a first recess of a first segment aligns with a first tooth of a second segment.

[0013] In another example embodiment, the first tooth surface is oriented at a first angle relative to a first plane, the first plane including a transverse axis and a first axis and a second axis, the transverse axis being perpendicular to the first longitudinal axis and the second longitudinal axis and the first axis and the second axis being oriented, and wherein the first recess surface is oriented at a second angle relative to the first plane.

[0014] In another example embodiment, the second angle has a slope opposite to the first angle.

[0015] In another example embodiment, the magnitude of the second angle is substantially the same as the magnitude of the first angle.

[0016] In another example embodiment, the slope of the first angle is in the range of 10° to 70°, and the slope of the second angle is in the range of 10° to 70°.

[0017] In an example embodiment, the second tooth of the first segment is aligned with the second recess of the second segment, and the second recess of the first segment is aligned with the second tooth of the second segment.

[0018] In another example embodiment, the second tooth surface is oriented at a third angle relative to the first plane, and the second recess surface is oriented at a fourth angle relative to the first plane.

[0019] In another example embodiment, the third angle has a slope equal to and opposite to the first angle, and the fourth angle has a slope equal to and opposite to the second angle.

[0020] In an example embodiment, the connector further includes a first pair of shoulders positioned adjacent to the first tooth and the first recess. Each of the first pair of shoulders has a first shoulder surface. The connector further includes a second pair of shoulders positioned adjacent to the second tooth and the second recess. Each of the second pair of shoulders has a second shoulder surface.

[0021] In another example embodiment, the first shoulder surface is oriented substantially parallel to the first plane, and the second shoulder surface is oriented substantially parallel to the first plane.

[0022] In an example embodiment, the first stop surface includes a first portion oriented at a fifth angle relative to the second plane. The second plane includes a first longitudinal axis and a second longitudinal axis, as well as a transverse axis. The second stop surface includes a first portion oriented at a sixth angle relative to the second plane.

[0023] In another example embodiment, the sixth angle has a slope equal to and opposite to the fifth angle.

[0024] In another example embodiment, the first stop surface further includes at least one second portion oriented at a seventh angle relative to the second plane, and the second stop surface includes at least one second portion oriented at an eighth angle relative to the second plane.

[0025] In another example embodiment, the eighth angle has a slope equal to and opposite to the seventh angle.

[0026] In another example embodiment, the seventh angle has a slope opposite to the fifth angle, and the eighth angle has a slope opposite to the sixth angle.

[0027] In an example embodiment, each of the first and second adjustable fasteners includes a nut and a bolt.

[0028] In an example embodiment, each segment includes a first arcuate protrusion positioned on opposite sides of the segment and a second arcuate protrusion. Each of the first and second arcuate protrusions faces the central space. When the segments are pulled toward each other by the first and second adjustable fasteners, each of the first and second arcuate protrusions is capable of engaging within a circumferential groove in the tubular element.

[0029] In an example embodiment, the seal is positioned within the central space. The seal supports the segments in a spaced relationship sufficient to allow the tubular elements to be inserted into the central space without disassembling the connector.

[0030] An example method of using the connector according to the invention includes adjusting a first adjustable fastener to pull a first segment and a second segment toward each other. The method includes engaging a first stop surface at a first end of the segment. The method includes adjusting a second adjustable fastener to pull the first segment and the second segment toward each other. The method includes engaging a second stop surface at a second end of the segment.

[0031] In an example embodiment, a first stop surface engages at a first end of a segment before adjusting the second adjustable fastener.

[0032] In another example embodiment, the connector is in a tightened state after the second stop surface engages.

[0033] In another example embodiment, the first and second segments are aligned relative to an axis parallel to and centered between the first and second longitudinal axes, and remain aligned in the tightened state.

[0034] An example connector according to the invention for connecting tubular elements in an end-to-end relationship includes a first segment and a second segment, which are attached end-to-end to each other to enclose a central space for receiving a tubular element. Each segment includes a first end and a second end. Each segment includes a first lug extending from its first end. A first adjustable fastener extends along a first longitudinal axis between the first lugs. A hinge assembly is attached to the second ends of the first and second segments. Each segment further includes a first inner surface positioned between the central space and the first lug. The first inner surface includes a first tooth and a first recess. Each segment includes a first stop surface positioned on a first lug. A first adjustable fastener is positioned between a first inner surface and the first stop surface. The first segment and the second segment are movable toward each other to a tightened state. The first adjustable fastener is configured to pull the first segment and the second segment toward each other to a tightened state. In the tightened state, the first stop surfaces at a first end of the segment engage, and a first tooth of the first segment is at least partially received within a first recess of the second segment, and a first tooth of the second segment is at least partially received within a first recess of the first segment.

[0035] In an example embodiment, a first gap exists between the first stop surfaces in the tightened state.

[0036] In an example embodiment, the first lug defines a first opening that surrounds a first axis oriented perpendicular to a first longitudinal axis of the first adjustable fastener and is positioned between the first inner surface and the first stop surface.

[0037] In another example embodiment, the first opening extends through the first lug.

[0038] In an example embodiment, the first tooth of the first segment is aligned with the first recess of the second segment, and the first recess of the first segment is aligned with the first tooth of the second segment.

[0039] In an example embodiment, the surface of the first tooth is oriented at a first angle relative to a first plane. The first plane includes a transverse axis and a first axis and a second axis. The transverse axis is oriented perpendicular to the first longitudinal axis and the second longitudinal axis, as well as the first axis and the second axis. The surface of the first recess is oriented at a second angle relative to the first plane.

[0040] In another example embodiment, the second angle has a slope opposite to the first angle.

[0041] In another example embodiment, the magnitude of the second angle is substantially the same as the magnitude of the first angle.

[0042] In another example embodiment, the slope of the first angle is in the range of 10° to 70°, and the slope of the second angle is in the range of 10° to 70°. Specification 3 / 14 page 9 CN 121986231 A

[0043] In an example embodiment, the connector further includes a first pair of shoulders positioned adjacent to the first tooth and the first recess, each of the first pair of shoulders having a first shoulder surface.

[0044] In another example embodiment, the first shoulder surface is oriented substantially parallel to the first plane.

[0045] In an example embodiment, the first stop surface includes a first portion oriented at a fifth angle relative to the second plane. The second plane includes a first longitudinal axis and a second longitudinal axis, as well as a transverse axis.

[0046] In another example embodiment, the first stop surface further includes at least one second portion oriented at a seventh angle relative to the second plane.

[0047] In another example embodiment, the seventh angle has a slope opposite to the fifth angle.

[0048] In an example embodiment, the first adjustable fastener includes a nut and a bolt.

[0049] In an example embodiment, each of the segments includes a first and a second arcuate protrusion positioned on opposite sides of the segment. Each of the first and second arcuate protrusions faces the central space. When the segments are pulled toward each other by a first adjustable fastener, each of the first and second arcuate protrusions is capable of engaging within a circumferential groove in the tube element.

[0050] In an example embodiment, the connector further includes a seal positioned within the central space. The seal supports the segments in a spaced-apart relationship sufficient to allow the tube element to be inserted into the central space without disassembling the connector.

[0051] FIG1 is an isometric view of an example mechanical connector according to the present invention; FIG2 is an isometric view of an example segment according to the present invention; FIG3 is a transparent side view of a segment of the example mechanical connector shown in FIG1; FIG4 is an end view of a segment of the example mechanical connector shown in FIG1; FIG4A is an end view of the segment shown in FIG4 in a tightened state; FIG4B is an end view of an example segment of the example mechanical connector; FIG4C is an end view of an example segment of the example mechanical connector shown in FIG4B in a tightened state; FIG4D is an end view of an example segment of the example mechanical connector; FIG4E is an end view of an example segment of the example mechanical connector shown in FIG4D in a tightened state; FIG4F is an end view of an example segment of the example mechanical connector; FIG4G is an end view of an example segment of the example mechanical connector shown in FIG4F in a tightened state; FIG5 is an isometric view of the example mechanical connector shown in FIG1, wherein the example seal is shown in a factory assembled state; Figure 6 is a side view of the example mechanical connector and seal shown in Figure 11; Figure 7 is a side perspective view of a segment of the example mechanical connector shown in Figure 1 in a tightened state under the first tolerance; Figure 8 is an enlarged view of segment 8 in Figure 7; Figure 9 is an enlarged view of segment 9 in Figure 7; Figure 10 is a side perspective view of a segment of the example mechanical connector shown in Figure 1 in a tightened state under the second tolerance; Figure 11 is an enlarged view of segment 11 in Figure 10; Figure 12 is an enlarged view of segment 12 in Figure 10; Figure 13 is a front view of the example seal; Figure 14 is a side view of the example mechanical connector with three segments according to the invention; and Figure 15 is a side view of the example hinged mechanical connector according to the invention. Detailed Description

[0052] Figure 1 shows an example connector 10 according to the invention for connecting pipe elements (not shown) in an end-to-end relationship. The connector 10 includes a first segment 12 and a second segment 14. The first segment 12 and the second segment 14 are attached end-to-end to each other to surround and define a central space 16 for receiving a tubular element. As shown in FIG. 2, the connector 10 may include a first arcuate protrusion 17 and a second arcuate protrusion 19, also referred to as a “key,” positioned on opposite sides of the segments 12, 14. The arcuate protrusions 17, 19 are configured to mate with circumferential grooves at the ends of the tubular elements connected by the connector 10. The arcuate protrusions 17, 19 face the central space 16 and are capable of engaging within the circumferential grooves in the tubular element when the segments are pulled together to connect the tubular elements. As shown in FIGS. 5 and 6, the connector 10 may further include a seal 18 positioned within the central space 16. The seal 18 may be an annular gasket made of an elastomer such as EPDM.Seal 18 supports segments 12, 14 in a spaced relationship sufficient to allow tube elements to be inserted into the central space 16 without disassembling connector 10. As shown in Figures 5 and 6, seal 18 may include a central leg 102 comprising a plurality of protrusions 104. Protrusions 104 may be rounded. Alternatively, as shown in Figure 13, central leg 102 may include a portion 106 comprising an edge that is radially spaced from the center of central space 16 by a smaller radial distance than the radial distance between the remaining edges of central leg 102. Optionally, portion 106 may have linear or substantially linear edges. Tube elements may be inserted into central space 16 to the extent that they contact central leg 102 of seal 18, which acts as a tube stop. When the ends of tube elements contact central leg 102, each arcuate protrusion 17, 19 may align with a corresponding circumferential groove in each tube element. Advantageously, a seal 18 with a central leg 102 having a protrusion 104 or a portion 106 can be used to assemble the connector 10 and tubular elements having straight or beveled ends. The connector according to the invention can also be used with flat-end tubes, shouldered tubes, or other shaped tube ends known in the art.

[0053] As further shown in FIG1, each segment 12, 14 includes a first lug 22 extending from its first end 20. A first adjustable fastener 24 extends between the first lugs 22 along a first longitudinal axis 26. The first lug 22 may define a first opening 28 surrounding a first axis 29 oriented perpendicular to the first longitudinal axis 26 of the first adjustable fastener 24. The first opening 28 may extend through the first lug 22. The bending stiffness of the first lug 22 can be adjusted to a desired value by properly designing the size of the first opening 28. A second lug 32 extends from a second end 30 of each segment 12, 14. A second adjustable fastener 34 extends between the second lugs 32 along a second longitudinal axis 36. The second lug 32 may define a second opening 38 surrounding a second axis 39 oriented perpendicular to the second longitudinal axis 36 of the second adjustable fastener 34. The second opening 38 may extend through the second lug 32. The bending stiffness of the second lug 32 may be adjusted to a desired value by properly designing the dimensions of the second opening 31. Preferably, the first lug 22 and the second lug 32 are adjusted to the same bending stiffness. As shown in FIG. 6, each fastener 24, 34 may include a nut 25 and a bolt 35. The adjustable fasteners 24, 34 may be tightened to pull the segments 12, 14 together.

[0054] As shown in FIG. 1 and FIG. 3, each segment 12, 14 further includes a first inner surface 40 positioned between the central space 16 and the first lug 22. As shown in FIG. 2 and FIG. 3, the first inner surface 40 may include a first tooth 42. The first tooth 42 has a first tooth surface 44.The first inner surface 40 may include a first recess 46. The first recess 46 has a first recess surface 48. The first tooth 42 of the first segment 12 is aligned with and configured to engage with the first recess 46 of the second segment 14. The first recess 46 of the first segment 12 is aligned with and configured to engage with the first tooth 42 of the second segment 14. The first tooth surface 44 may be oriented at a first angle 43 relative to a first plane 87. The first plane 87 includes a transverse axis 85 and a first axis 29 and a second axis 39. The transverse axis 85 may be oriented perpendicular to the first longitudinal axis 26 and the second longitudinal axis 36, as well as the first axis 29 and the second axis 39. The first recess surface 48 may be oriented at a second angle 45 relative to the first plane 87. The second angle 45 may have a slope opposite to the first angle 43 (opposite sign). The value of the second angle 45 may be the same as or substantially the same as the value of the first angle 43 (e.g., within 5° to 10°). The slope of the first angle 43 may be in the range of 10° to 70°. The slope of the first angle 43 may preferably be in the range of 20° to 25°. The slope of the second angle 45 may be in the range of 10° to 70°. The slope of the second angle 45 may be in the range of 20° to 25°.

[0055] As shown in Figures 1 and 3, each segment 12, 14 includes a second inner surface 60 positioned between the central space 16 and the second lug 32. As shown in Figures 2 and 3, the second inner surface 60 may include a second tooth 62. The second tooth 62 has a second tooth surface 64. The second inner surface 60 may include a second recess 66. The second recess 66 has a second recess surface 68. The second tooth 62 of the first segment 12 is aligned with and configured to engage with the second recess 66 of the second segment 14. The second recess 66 of the first segment 12 is aligned with and configured to engage with the second tooth 62 of the second segment 14. The second tooth surface 64 may be oriented at a third angle 63 relative to the first plane 87. The second recess surface 68 may be oriented at a fourth angle 65 relative to the first plane 87. The third angle 63 has a slope opposite to that of the first angle 43 (opposite sign). It is advantageous for the third angle 63 to have a slope equal to (in magnitude) or substantially equal to (e.g., within 5° to 10°) the slope of the first angle 43. The fourth angle 65 has a slope opposite to that of the second angle 45 (opposite sign). It is advantageous for the fourth angle 65 to have a slope equal to (in magnitude) or substantially equal to (e.g., within 5° to 10°) the slope of the second angle 45.Advantageously, the vertical or substantially vertical walls adjacent to the teeth 42, 62 and the recesses 46, 66 can help align the segments 12, 14 when they are pulled together when the adjustable fasteners 24, 34 are tightened. Furthermore, the vertical or substantially vertical walls adjacent to the teeth 42, 62 and the recesses 46, 66 can help prevent rotation of the segments 12, 14 after they have been pulled together.

[0056] As shown in FIG2, the connector 10 may further include a first pair of shoulders 41 positioned adjacent to the first tooth 42 and the first recess 46. Each first shoulder 41 has a first shoulder surface 47. The connector 10 may include a second pair of shoulders 61 positioned adjacent to the second tooth 62 and the second recess 66. Each second shoulder 61 has a second shoulder surface 67. The first shoulder surface 47 may be oriented substantially parallel (e.g., within a parallel range of 5° to 10°) or parallel to the first plane 87. The second shoulder surface 67 may be oriented substantially parallel (e.g., within a parallel range of 5° to 10°) or parallel to the first plane 87.

[0057] As shown in FIG1, each segment 12, 14 further includes a first stop surface 50 positioned on the first lug 22. The first stop surface 50 may be spaced apart from the first inner surface 40, wherein the first opening 28 and the first adjustable fastener 24 are positioned between the first stop surface 50 and the first inner surface 40. As shown in FIGS. 4 to 4G, the geometry of the first stop surface 50 of the first segment 12 may be complementary to the geometry of the first stop surface 50 of the second segment 14. For example, when the first stop surface 50 of the first segment 12 defines a receiving space, the first stop surface 50 of the second segment 14 may be shaped to insert into the receiving space when the first and second segments are engaged to interlock the first stop surface 50, as further described herein. Similarly, as another example, when the first stop surface 50 of the second segment 14 defines a receiving space, the first stop surface 50 of the first segment 12 may be shaped to insert into the receiving space when the first and second segments engage to interlock the first stop surface 50, as further described herein. As shown in Figures 2 and 4 through 4C, the first stop surface 50 may include a first portion 52 oriented at a fifth angle 54 relative to a second plane 88. The second plane 88 includes a first longitudinal axis 26 and a second longitudinal axis 36, as well as a transverse axis 85. The first stop surface 50 may include at least one second portion 56 oriented at a seventh angle 58 relative to the second plane 88. The seventh angle 58 may have a slope opposite (in sign) to the fifth angle 54. The fifth angle 54 and the seventh angle 58 may each be between 35° and 70°. Optionally, the first stop surface 50 may include two second portions 56a, 56b.A first portion 52 may be positioned between second portions 56a and 56b. As shown in Figures 4 to 4C, the first portion 52 and the second portion 56a may form a peak 53, and the first portion and the other second portion 56b may form a valley 57. The peak 53 of the first segment 12 may be complementary to the valley 57 of the second segment 15, and the peak 53 of the second segment 14 may be complementary to the valley 57 of the first segment 12. Optionally, as shown in Figures 4 and 4A, the first portion 52 and the second portion 56a may form a convex curve, and the first portion and the other second portion 56b may form a concave curve. The convex curve of the first segment 12 may be complementary to the concave curve of the second segment 14, and the convex curve of the second segment 14 may be complementary to the concave curve of the first segment 12. Optionally, as shown in Figures 4F and 4G, the stop surface 50 includes a first portion 51 and a second portion 55, which are oriented parallel to or substantially parallel to (between 0° and 5°) a first axis 29. A third portion 59, oriented parallel to or substantially parallel to (between 0° and 5°) the longitudinal axis 26, is positioned between the first portion 51 and the second portion 55 (optionally extending between the first portion 51 and the second portion 55), such that the second portion 55 is recessed relative to the first portion 51. The first portion 51 of the first segment 12 may be complementary to the second portion 55 of the second segment 14, and the first portion 51 of the second segment 14 may be complementary to the second portion 55 of the first segment 12. As shown, the first portion 51 of the stop surface 50 may be defined by a structure projecting away from the second portion 55. The second portion 55 and the third portion 59 of the stop surface 50 may at least partially define a receiving space configured to complementaryly receive the structure defining the first portion 51 of the stop surface.

[0058] As shown in FIG1, each segment 12, 14 further includes a second stop surface 70 positioned on the second lug 32. The second stop surface 70 may be spaced apart from the second inner surface 60, wherein the second opening 38 and the second adjustable fastener 34 are positioned between the second stop surface 70 and the second inner surface 60. As shown in Figures 4 to 4E, the geometry of the second stop surface 70 of the first segment 12 may be complementary to the geometry of the second stop surface 70 of the second segment 14. For example, when the second stop surface 70 of the first segment 12 defines a receiving space, the second stop surface 70 of the second segment 14 may be shaped to insert into the receiving space when the first and second segments are engaged to interlock the second stop surface 70, as further described herein. Similarly, as another example, when the second stop surface 70 of the second segment 14 defines a receiving space, the second stop surface 70 of the first segment 12 may be shaped to insert into the receiving space when the first and second segments are engaged to interlock the second stop surface 70, as further described herein.As shown in Figures 2 and 4 through 4C, the second stop surface 70 may include a first portion 72 oriented at a sixth angle 74 relative to the second plane 88. The sixth angle 74 may have a slope that is equal (in magnitude) or substantially equal (e.g., within 5° to 10°) and opposite (in sign) to the fifth angle 54. The second stop surface 70 may include at least one second portion 76 oriented at an eighth angle 78 relative to the second plane 88. The eighth angle 78 may have a slope that is equal (in magnitude) or substantially equal (e.g., within 5° to 10°) and opposite (in sign) to the seventh angle 58. The eighth angle 78 may have a slope opposite to the sixth angle 74. The sixth angle 74 and the eighth angle 78 may each be between 35° and 70°. Optionally, the second stop surface 70 may include two second portions 76a, 76b. As shown in Figures 4 through 4C, the first portion 72 may be positioned between the second portions 76a, 76b. The first portion 72 and the second portion 76a may form a peak 73, and the first portion and the other second portion 76b may form a valley 77. The peak 73 of the first segment 12 may be complementary to the valley 77 of the second segment 15, and the peak 73 of the second segment 14 may be complementary to the valley 77 of the first segment 12. Optionally, as shown in Figures 4 and 4A, the first portion 72 and the second portion 76a may form a convex curve, and the first portion 72 and the other second portion 76b may form a concave curve. The convex curve of the first segment 12 may be complementary to the concave curve of the second segment 14, and the convex curve of the second segment 14 may be complementary to the concave curve of the first segment 12. Optionally, as shown in Figures 4F and 4G, the stop surface 70 includes a first portion 71 and a second portion 75, which are oriented parallel to or substantially parallel to (between 0° and 5°) the second axis 39. A third portion 79, oriented parallel to or substantially parallel to (between 0° and 5°) the longitudinal axis 26, is positioned between the first portion 71 and the second portion 75 (optionally extending between the first portion 71 and the second portion 75), such that the second portion 55 is recessed relative to the first portion 51. The first portion 71 of the first segment 12 may be complementary to the second portion 75 of the second segment 14 (see page 7 / 14 of specification 13 CN 121986231 A), and the first portion 71 of the second segment 14 may be complementary to the second portion 75 of the first segment 12. As shown, the first portion 71 of the stop surface 70 may be defined by a structure projecting away from the second portion 75. The second portion 75 and the third portion 79 of the stop surface 70 may at least partially define a receiving space configured to complementaryly receive the structure defining the first portion 71 of the stop surface.

[0059] The operation of the connector 10 is described with reference to the accompanying drawings.Figures 5 and 6 show an example connector 10 in a factory-assembled configuration, where segments 12 and 14 are supported on a seal 18 in a spaced-apart relationship, the distance between them sufficient to allow a tubular element (not shown) to be inserted into a central space 16. In this factory-assembled example, fasteners 24 and 34 have been sufficiently tightened to hold the segments against the seal 18. The tubular element is inserted into the central space 16, and the circumferential grooves of the tubular element align with the arcuate protrusions 17, 19 on segments 12 and 14. Fasteners 24 and 34 are then further tightened to pull segments 12 and 14 toward each other. As fasteners 24 and 34 are being adjusted to pull segments 12 and 14 toward each other, the arcuate protrusions 17, 19 engage with the circumferential grooves of the tubular element. When fasteners 24 and 34 are tightened, segments 12 and 14 are aligned relative to axes 26 and 36 as segments 12 and 14 are pulled toward each other. Teeth 42, 62 and recesses 46, 66 further ensure alignment of segments 12 and 14 when they are pulled together. Regarding Figures 4 and 4a, when segments 12 and 14 are pulled from their separated position (shown in Figure 4) toward each other to a tightened state (shown in Figure 4a), stop surfaces 50, 70 and their corresponding portions 52, 56, 72, 76 move axially along the longitudinal axes 26, 36 of the fastener. When segments 12 and 14 are pulled from their separated position (shown in Figure 4) toward each other to a tightened state (shown in Figure 4a), segments 12 and 14 may not rotate relative to each other about axis 11 or may rotate only slightly (e.g., at most 5°), thereby minimizing or eliminating displacement between stop surfaces 50, 70 and their corresponding portions 52, 56, 72, 76. Axis 11 is parallel to and centered between longitudinal axes 26, 36. As shown in Figures 4 and 4E, when the first segment and the second segment are pulled toward each other to a tightened state, the complementary portions of the first stop surface 50 remain aligned (relative to their relative positions about axis 11), and the complementary portions of the second stop surface 70 remain aligned (relative to their relative positions about axis 11). For example, when the first segment 12 and the second segment 14 are pulled toward each other to a tightened state, the corresponding peaks 53 and valleys 57 of the first stop surface 50 remain aligned, and the corresponding peaks 73 and valleys 77 of the second stop surface 70 remain aligned. The geometry of the first stop surface 50, including the first portion 52 and the second portion 56, allows the first segment 12 and the second segment 14 to remain unrotated or only slightly rotated relative to each other about axis 11 due to the engagement between the first stop surfaces 50 of the first segment 12 and the second segment 14. The geometry of the second stop surface 70, including the first part 72 and the second part 76, allows the first segment 12 and the second segment 14 to not rotate relative to each other about the axis 11 or to rotate only slightly due to the engagement between the second stop surfaces 70 of the first segment 12 and the second segment 14.Minimizing the displacement of the first segment 12 and the second segment 14 about the axis 11 reduces or eliminates any deformation of the seal 18 that could otherwise be caused by segments designed to rotate relative to each other. Although Figures 4 and 4E show the connector 10 without the seal 18, it is understood that the positions and configurations of segments 12, 14 in the factory assembly configuration and in the tightened state including the seal 18 correspond to the positions and configurations of segments 12, 14 shown in Figures 4 and 4E.

[0060] The contact between the connector 10 and the pipe element to which the connector can be connected produces a joint with greater stiffness or rigidity. Because the connector 10 depends on the contact between the connector and the pipe element, it can be affected by a wide range of tolerances on the pipe surface and on the mating surfaces of the connector. Tolerances for groove depth, groove width, and groove position in tubular components are known to those skilled in the art and are coded by standards for grooves to facilitate product interoperability. This may include AWWA standard C-606 for grooved and shouldered joints, which is hereby incorporated herein by reference in its entirety. Tolerances for the diameter of the arcuate surface of a connector segment, as measured from the center of the corresponding segment (corresponding to the diameter of the best-fit curve of the arcuate surface), are known to those skilled in the art (the known range in the art is approximately + / - 0.040). Those skilled in the art will understand that the arcuate surface of the segment may be imperfect. (See page 8 / 14 of CN 121986231 A).

[0061] The connector 10 is designed to produce a relatively rigid joint due to strong contact between the arcuate surface of the segment and the bottom of the groove between the tube element within a wide tolerance range of the groove diameter (such as the range of groove diameters falling within, for example, the tolerances established by AWWA standard C-606 for slotted and shouldered joints) and the diameter of the arcuate surface of the segment, as measured from the center of the respective segment (corresponding to the diameter of the best-fit curve of the arcuate surface), while still allowing visual indication that a proper joint has been formed. Figures 7 and 10 show segments 12, 14 in an assembled or tightened state after the adjustable fasteners 24, 34 have been tightened at different points within the tolerance range of the circumferential groove in the tube element and the arcuate surface of the connector segment (i.e., between the first extreme where the tube diameter is largest and the arcuate surface diameter is smallest and the second extreme where the tube diameter is smallest and the arcuate surface diameter is largest). The construction illustrations in Figures 7 and 10 depict certain tolerance conditions, and the full range of tolerance conditions encountered in field applications is envisioned within the scope of the disclosed connectors and joints, including those intermediate tolerance conditions specifically illustrated or described herein.When the first adjustable fastener 24 and the second adjustable fastener 34 are adjusted to pull the first segment 12 and the second segment 14 toward each other to a tightened state, the first stop surfaces 50 of segments 12, 14 engage and the second stop surfaces 70 of segments 12, 14 engage. At a certain point, the engagement between the arcuate protrusions 17, 19 and the circumferential grooves of the tubular element prevents segments 12, 14 from pulling toward each other. At this point, the first lug 22 and the second lug 32 can be bent toward each other respectively until the corresponding stop surfaces 50, 70 engage (see Figures 9 and 12). The stop surfaces 50, 70 (including the geometry of the stop surfaces 50, 70, their lengths, their positions on the segments, and their orientation angles) mitigate the rotation of segments 12, 14 relative to each other caused by friction between the torsional fasteners and their corresponding lugs during engagement, and prevent segments 12, 14 from rotating relative to each other once they are pulled together. The engagement between the stop surfaces 50 and / or between the stop surfaces 70 can also serve as a final visual confirmation that the connector 10 has been properly installed. The stop surfaces 50, 70 can provide this visual confirmation across the entire tolerance range (from the lower end to the higher end of the tolerance range) applied to the circumferential groove in the tubular element. Therefore, regardless of where the circumferential groove in the tubular element falls on the tolerance spectrum, a technician only needs to tighten the fasteners 24 and 34 until the stop surfaces 50 and 70 engage. This engagement provides the final visual confirmation that the connector 10 has been properly installed.

[0062] As shown in Figures 7 through 9, in the tightened state under the first tolerance, after the first stop surfaces 50 engage, a first gap 80 (see Figure 9) may exist between the first inner surfaces 40, which is not at the higher end of the groove diameter tolerance range. After the second stop surfaces 70 engage, a second gap 90 may exist between the second inner surfaces 60 (see Figure 8). The first gap 80 and the second gap 90 may extend across the entire first inner surface 40 and the second inner surface 60 (moving along axes 29, 39), including respectively aligned teeth 42, 62 and recesses 46, 66 and adjacent shoulders 41, 61. The position of the shoulders 41, 61 relative to the teeth 42, 62 and recesses 46, 66 may leave a larger gap between the shoulders 41, 61 than at the respectively aligned teeth 42, 62 and recesses 46, 66.

[0063] As shown in Figures 10 to 12, in the tightened state under the second tolerance, when the stop surfaces 50, 70 engage, at least a portion of the first inner surface 40 and / or the second inner surface 60 may contact each other, the second tolerance being at or near the higher end of the groove diameter tolerance range. As shown in Figures 11 and 12, the surfaces of the respectively aligned teeth 42, 62 and recesses 46, 66 may contact each other. The gaps 81 and 91 can be maintained between the corresponding shoulder sections 41 and 61.The gaps 81 and 91 between the corresponding shoulders 41 and 61 ensure sufficient contact between the arcuate protrusions 17 and 19 of segments 12 and 14 and the bottom of the circumferential groove of the tubular element.

[0064] Under tight conditions throughout the tolerance range, the aligned teeth 42 and 62 and the recesses 44 and 66 provide structural support to the seal 18. The aligned teeth 42 and 62 and the recesses 46 and 66 (including the geometry of the tooth surfaces 44 and 64 and the recess surfaces 48 and 68, their dimensions, their positions on the segments, and their orientation angles) conceal and / or protect the seal 18, and prevent the seal 18 from protruding into and being squeezed through the gaps 80 and 90 when gaps 80 and 90 are formed, thereby preventing the formation of a leakage path. By concealing the seal 18, the aligned teeth 42, 62 and recesses 46, 66 prevent the installer from mistakenly concluding that the connector 10 is improperly installed because the seal is visible. Furthermore, the aligned shoulders 41, 61 conceal and / or protect the seal 18 and prevent it from protruding into and being squeezed through the gaps 80, 81, 90, 91, thereby preventing the formation of leakage paths. The gaps 80, 81, 90, 91 also ensure alignment and contact between the stop surfaces 50 and between the stop surfaces 70, thereby achieving a rigid connector.

[0065] FIG14 illustrates another exemplary embodiment of the connector 110 according to the invention. The connector 110 shares many features of the connector embodiment 10 described above, but includes three segments 12, 13, 14 that are attached end-to-end to each other to surround and define a central space 16 for receiving tubular elements. The third segment 13 includes the same or substantially the same features as the first segment 12 and the second segment 14. Although the connector 110 has three segments 12, 13, 14, more than three segments are also possible. For example, the connector may include four segments that are attached end-to-end to each other to surround and define a central space.

[0066] FIG15 illustrates another example embodiment of the connector 210 according to the invention. The connector 210 shares many features of the connector embodiment 10 described above, but replaces the second lug 32 with a hinge. The second ends 30 of each segment 12 and 14, arranged opposite to the first ends 20, are connected to a hinge 120 that connects the first segment and the second segment to each other. The hinge 120 defines a hinge axis 122 oriented transversely to the longitudinal axis 26 of the first fastener 24. The first segment 12 and the second segment 14 are pivotable about the hinge axis 122.Adjusting the first fastener 24 pivots the first segment 12 and the second segment 14 and thereby pulls them toward each other, and as shown in FIG9 or FIG12, depending on the tolerance range, the engagement between the first stop surfaces 50 on the first lug 26 prevents the segments from rotating relative to each other. In this example embodiment, the cantilever arms 124, 126 of the hinge 120 engage with each other at the fulcrum 128. The cantilever arms 124, 126 are connected by a ring 130, which is held by projecting heads 132, 134 on each cantilever. Other forms of hinge joints (such as saddle and stirrup hinges, pin hinges, cast hinges, etc.) are also feasible.

[0067] The invention also includes a method of installing a connector 10 as described herein for connecting tubular elements in an end-to-end relationship. In an example embodiment, the method includes: adjusting a first adjustable fastener 24 to pull the first segment 12 and the second segment 14 toward each other, with the connector in a factory-assembled configuration; engaging a first stop surface 50 at the first end 20 of the segments 12, 14; adjusting a second adjustable fastener 34 to pull the first segment 12 and the second segment 14 toward each other; and engaging a second stop surface 70 at the second end 30 of the segments 12, 14.

[0068] Optionally, the first stop surface 50 at the first end 20 of the segments 12, 14 is engaged before adjusting the second adjustable fastener 34.

[0069] After the second stop surface is engaged, the connector 10 is in a tightened state.

[0070] Optionally, the first segment 12 and the second segment 14 (relative to their position around axis 11) are aligned and remain aligned in the tightened state.

[0071] It is anticipated that the connector according to the invention will be easily assembled to connect tubular elements together, while providing consistent and clear visual indication of proper installation and protecting and properly compressing the seals.

[0072] Exemplary Aspects Certain more specifically described aspects of the invention are described below in view of the described products, systems, and methods and their variations. However, these specifically described aspects should not be construed as having any limiting effect on any different claims that incorporate the different or more general teachings described herein, or that the “specific” aspects are limited in any way other than the inherent meaning of the language used in the literally described specification 10 / 14 pages 16 CN 121986231 A.

[0073] Aspect 1: A connector for connecting tubular elements in an end-to-end relationship, the connector comprising: a first segment and a second segment, which are attached end-to-end to each other to surround a central space for receiving a tubular element, each segment including a first lug extending from a first end of the segment and a second lug extending from a second end of the segment; a first adjustable fastener and a second adjustable fastener, the first adjustable fastener extending between the first lugs along a first longitudinal axis and the second adjustable fastener extending between the second lugs along a second longitudinal axis; wherein each segment further includes: a first inner surface positioned between the central space and the first lugs, the first inner surface including a first tooth and a first recess; a first stop surface positioned on the first lugs, the first adjustable fastener being positioned between the first inner surface and the first stop surface; A second inner surface, positioned between the central space and the second lug, includes a second tooth and a second recess; and a second stop surface positioned on the second lug, with a second adjustable fastener positioned between the second inner surface and the second stop surface; wherein the first segment and the second segment are movable toward each other to a tightened state; the first and second adjustable fasteners are configured to pull the first segment and the second segment toward each other to a tightened state; and wherein in the tightened state: the first stop surface at the first end of the segment engages and the second stop surface at the second end of the segment engages; and the first tooth of the first segment is at least partially received in the first recess of the second segment, and the first tooth of the second segment is at least partially received in the first recess of the first segment.

[0074] Aspect 2: According to the connector of aspect 1, wherein, in the tightened state, the second tooth of the first segment engages with the second recess of the second segment, and the second recess of the first segment engages with the second tooth of the second segment.

[0075] Aspect 3: A connector according to any of the preceding aspects, wherein, in the tightened state, a first gap exists between the first stop surfaces.

[0076] Aspect 4: A connector according to aspect 3, wherein, in the tightened state, a second gap exists between the second inner surfaces.

[0077] Aspect 5: A connector according to any of the preceding aspects, wherein a first lug defines a first opening that surrounds a first axis oriented perpendicular to a first longitudinal axis of the first adjustable fastener and is positioned between the first inner surface and the first stop surface.

[0078] Aspect 6: A connector according to aspect 5, wherein the first opening extends through the first lug.

[0079] Aspect 7: A connector according to aspect 5, wherein a second lug defines a second opening that surrounds a second axis oriented perpendicular to a second longitudinal axis of the second adjustable fastener and is positioned between the second inner surface and the second stop surface.

[0080] Aspect 8: The connector according to aspect 7, wherein the second opening extends through the second lug.

[0081] Aspect 9: The connector according to any of the preceding aspects, wherein: the first tooth of the first segment is aligned with the first recess of the second segment, and the first recess of the first segment is aligned with the first tooth of the second segment.

[0082] Aspect 10: The connector according to any of the preceding aspects, wherein the surface of the first tooth is oriented at a first angle relative to a first plane, the first plane comprising a transverse axis and a first axis and a second axis, the transverse axis being oriented perpendicular to the first longitudinal axis and the second longitudinal axis and the first axis and the second axis, and wherein the surface of the first recess is oriented at a second angle relative to the first plane.

[0083] Aspect 11: The connector according to aspect 10, wherein the second angle has a slope opposite to the first angle.

[0084] Aspect 12: The connector according to aspect 11, wherein the magnitude of the second angle is substantially the same as the magnitude of the first angle.

[0085] Aspect 13: The connector according to aspect 11, wherein the slope of the first angle is in the range of 10° to 70°, and the slope of the second angle is in the range of 10° to 70°.

[0086] Aspect 14: The connector according to any of the preceding aspects, wherein: the second tooth of the first segment is aligned with the second recess of the second segment, and the second recess of the first segment is aligned with the second tooth of the second segment.

[0087] Aspect 15: The connector according to any of the preceding aspects, wherein the surface of the second tooth is oriented at a third angle relative to the first plane, and the surface of the second recess is oriented at a fourth angle relative to the first plane.

[0088] Aspect 16: The connector according to aspect 15, wherein the third angle has a slope equal to and opposite to the first angle, and the fourth angle has a slope equal to and opposite to the second angle.

[0089] Aspect 17: The connector according to aspect 13 further includes: a first pair of shoulders positioned adjacent to the first tooth and the first recess, each of the first pair of shoulders having a first shoulder surface; and a second pair of shoulders positioned adjacent to the second tooth and the second recess, each of the second pair of shoulders having a second shoulder surface.

[0090] Aspect 18: The connector according to aspect 17, wherein the first shoulder surface is oriented substantially parallel to the first plane, and the second shoulder surface is oriented substantially parallel to the first plane.

[0091] Aspect 19: The connector according to any of the preceding aspects, wherein the first stop surface includes a first portion oriented at a fifth angle relative to a second plane, the second plane including a first longitudinal axis and a second longitudinal axis and a transverse axis, wherein the second stop surface includes a first portion oriented at a sixth angle relative to the second plane.

[0092] Aspect 20: The connector according to aspect 19, wherein the sixth angle has a slope equal to and opposite to that of the fifth angle.

[0093] Aspect 21: The connector according to aspect 20, wherein the first stop surface further includes at least one second portion oriented at a seventh angle relative to the second plane, and the second stop surface includes at least one second portion oriented at an eighth angle relative to the second plane.

[0094] Aspect 22: The connector according to aspect 21, wherein the eighth angle has a slope equal to and opposite to that of the seventh angle.

[0095] Aspect 23: The connector according to aspect 21, wherein the seventh angle has a slope opposite to that of the fifth angle, and the eighth angle has a slope opposite to that of the sixth angle.

[0096] Aspect 24: The connector according to any of the preceding aspects, wherein each of the first adjustable fastener and the second adjustable fastener includes a nut and a bolt. Specification 12 / 14 pages 18 CN 121986231 A

[0097] Aspect 25: A connector according to any of the foregoing aspects, wherein each of the segments includes a first arcuate protrusion and a second arcuate protrusion positioned on opposite sides of the segment, each of the first arcuate protrusion and the second arcuate protrusion facing the central space, and each of the first arcuate protrusion and the second arcuate protrusion being capable of engaging within a circumferential groove in the tube element when the segments are pulled toward each other by a first adjustable fastener and a second adjustable fastener.

[0098] Aspect 26: A connector according to any of the foregoing aspects, further comprising a seal positioned within the central space, the seal supporting the segments in a spaced-apart relationship sufficient to allow the tube element to be inserted into the central space without disassembling the connector.

[0099] Aspect 27: A method of using a connector according to any of the preceding aspects, the method comprising: adjusting a first adjustable fastener to pull a first segment and a second segment toward each other; engaging a first stop surface at a first end of a segment; adjusting a second adjustable fastener to pull the first segment and the second segment toward each other; and engaging a second stop surface at a second end of a segment.

[0100] Aspect 28: The method of aspect 27, wherein the first stop surface at the first end of a segment is engaged before adjusting the second adjustable fastener.

[0101] Aspect 29: The method of aspect 28, wherein the connector is in a tightened state after the second stop surface is engaged.

[0102] Aspect 30: The method of aspect 29, wherein the first segment and the second segment are aligned relative to an axis parallel to a first longitudinal axis and a second longitudinal axis and centered between the first longitudinal axis and the second longitudinal axis, and remain aligned in the tightened state.

[0103] Aspect 31: A connector for connecting tubular elements end-to-end in a connection, the connector comprising: a first segment and a second segment attached end-to-end to each other to enclose a central space for receiving a tubular element, each segment including a first end and a second end, each segment including a first lug extending from its first end; a first adjustable fastener extending along a first longitudinal axis between the first lugs; and a hinge assembly attached to the second ends of the first and second segments; wherein each segment further comprises: a first inner surface positioned between the central space and the first lug, the first inner surface including a first tooth and a first recess; and a first stop surface positioned on the first lug, the first adjustable fastener positioned between the first inner surface and the first stop surface; wherein the first and second segments are movable toward each other to a tightened state; the first adjustable fastener is configured to pull the first and second segments toward each other to a tightened state; and wherein in the tightened state: A first stop surface engages at a first end of a segment, and a first tooth of the first segment is at least partially received within a first recess of the second segment, and a first tooth of the second segment is at least partially received within a first recess of the first segment.

[0104] Aspect 32: The connector according to aspect 31, wherein, in the tightened state, a first gap exists between the first stop surfaces. Specification 13 / 14 pages 19 CN 121986231 A

[0105] Aspect 33: The connector according to any of aspects 31 to 32, wherein a first lug defines a first opening that surrounds a first axis oriented perpendicular to a first longitudinal axis of the first adjustable fastener and is positioned between a first inner surface and a first stop surface.

[0106] Aspect 34: The connector according to aspect 33, wherein the first opening extends through the first lug.

[0107] Aspect 35: A connector according to any of aspects 31 to 34, wherein: the first tooth of the first segment is aligned with the first recess of the second segment, and the first recess of the first segment is aligned with the first tooth of the second segment.

[0108] Aspect 36: A connector according to any of aspects 31 to 35, wherein the surface of the first tooth is oriented at a first angle relative to a first plane, the first plane comprising a transverse axis and a first axis and a second axis, the transverse axis being oriented perpendicular to the first longitudinal axis and the second longitudinal axis and the first axis and the second axis, and wherein the surface of the first recess is oriented at a second angle relative to the first plane.

[0109] Aspect 37: A connector according to aspect 36, wherein the second angle has a slope opposite to the first angle.

[0110] Aspect 38: A connector according to aspect 37, wherein the magnitude of the second angle is substantially the same as the magnitude of the first angle.

[0111] Aspect 39: The connector according to aspect 37, wherein the slope of the first angle is in the range of 10° to 70°, and the slope of the second angle is in the range of 10° to 70°.

[0112] Aspect 40: The connector according to any of aspects 31 to 39, further comprising: a first pair of shoulders positioned adjacent to the first tooth and the first recess, each of the first pair of shoulders having a first shoulder surface.

[0113] Aspect 41: The connector according to aspect 40, wherein the first shoulder surface is oriented substantially parallel to a first plane.

[0114] Aspect 42: The connector according to any of aspects 31 to 41, wherein the first stop surface includes a first portion oriented at a fifth angle relative to a second plane, the second plane including a first longitudinal axis and a second longitudinal axis and a transverse axis.

[0115] Aspect 43: The connector according to aspect 42, wherein the first stop surface further includes at least one second portion oriented at a seventh angle relative to the second plane.

[0116] Aspect 44: The connector according to aspect 42, wherein the seventh angle has a slope opposite to that of the fifth angle.

[0117] Aspect 45: The connector according to any of aspects 31 to 44, wherein the first adjustable fastener includes a nut and a bolt.

[0118] Aspect 46: The connector according to any of aspects 31 to 45, wherein each of the segments includes a first and a second arcuate protrusion positioned on opposite sides of the segment, each of the first and second arcuate protrusions facing the central space, and each of the first and second arcuate protrusions being capable of engaging within a circumferential groove in the tube element when the segments are pulled toward each other by the first adjustable fastener.

[0119] Aspect 47: The connector according to any of aspects 31 to 46, further comprising a seal positioned within the central space, the seal supporting the segments in a spaced-apart relationship sufficient to allow the tube element to be inserted into the central space without disassembling the connector.Instruction manual, page 14 / 14, 20 CN 121986231 A, Figure 1; Instruction manual, Figure 1 / 21, page 21 CN 121986231 A, Figure 2; Instruction manual, Figure 2 / 21, page 22 CN 121986231 A, Figure 3; Instruction manual, Figure 3 / 21, page 23 CN 121986231 A, Figure 4; Instruction manual, Figure 4 / 21, page 24 CN 121986231 A, Figure 4A; Instruction manual, Figure 5 / 21, page 25 CN 121986231 A, Figure 4B; Instruction manual, Figure 6 / 21, page 26 CN 121986231 A, Figure 4C; Instruction manual, Figure 7 / 21, page 27 CN 121986231 A, Figure 4D; Instruction manual, Figure 8 / 21, page 28 CN 121986231 A, Figure 4E; Instruction manual, Figure 9 / 21, page 29 CN 121986231 A, Figure 4F. Figure 4G, Figure 5, Figure 6, Figure 7, Figure 8, Figure 9, Figure 10, Figure 10, Figure 11, Figure 121986231 A, Figure 121986231 A, Figure 121986231 A, Figure 121986231 A, Figure 13, Figure 14, Figure 15, Figure 16, Figure 17, Figure 18, Figure 19, Figure 10, Figure 11, Figure 12, Figure 13, Figure 14, Figure 15, Figure 16, Figure 17, Figure 18, Figure 19, Figure 10, Figure 12, Figure 19, Figure 10, Figure 11, Figure 12, Figure 19, Figure 10, Figure 11, Figure 12, Figure 19, Figure 10, Figure 11, Figure 19, Figure 10 ... 121986231 A Figure 14 Instruction Manual Drawings 20 / 21 Page 40 CN 121986231 A Figure 15 Instruction Manual Drawings 21 / 21 Page 41 CN 121986231 A.

Claims

1. A connector for connecting pipe elements end-to-end, the connector comprising: The first segment and the second segment are attached end-to-end to each other to enclose a central space for receiving the tubular element. Each segment includes a first lug extending from a first end of the segment and a second lug extending from a second end of the segment. A first adjustable fastener and a second adjustable fastener, the first adjustable fastener extending along a first longitudinal axis between the first lugs, and the second adjustable fastener extending along a second longitudinal axis between the second lugs. in Each of the segments further includes: A first inner surface is positioned between the central space and the first lug, the first inner surface including a first tooth and a first recess; A first stop surface is positioned on the first lug, and the first adjustable fastener is positioned between the first inner surface and the first stop surface. A second inner surface, positioned between the central space and the second lug, the second inner surface including a second tooth and a second recess; and A second stop surface is positioned on the second lug, and a second adjustable fastener is positioned between the second inner surface and the second stop surface; wherein The first segment and the second segment can move toward each other into an tightened state; The first adjustable fastener and the second adjustable fastener are configured to pull the first segment and the second segment toward each other into the tightened state; and wherein In the tightened state: The first stop surface engages at the first end of the segment, and the second stop surface engages at the second end of the segment; and The first tooth of the first segment is at least partially received within the first recess of the second segment, and the first tooth of the second segment is at least partially received within the first recess of the first segment.

2. The connector according to claim 1, wherein, In the tightened state, the second tooth of the first segment engages with the second recess of the second segment, and the second recess of the first segment engages with the second tooth of the second segment.

3. The connector according to claim 1, wherein, In the tightened state, there is a first gap between the first stop surface.

4. The connector according to claim 3, wherein, In the tightened state, a second gap exists between the second inner surfaces.

5. The connector according to claim 1, wherein, The first lug defines a first opening that surrounds a first axis oriented perpendicular to the first longitudinal axis of the first adjustable fastener and is positioned between the first inner surface and the first stop surface.

6. The connector according to claim 5, wherein, The first opening extends through the first lug.

7. The connector according to claim 5, wherein, The second lug defines a second opening that surrounds a second axis oriented perpendicular to the second longitudinal axis of the second adjustable fastener and is positioned between the second inner surface and the second stop surface.

8. The connector according to claim 7, wherein, The second opening extends through the second lug.

9. The connector according to claim 1, wherein: The first tooth of the first segment aligns with the first recess of the second segment, and The first recess of the first segment is aligned with the first tooth of the second segment.

10. The connector according to claim 1, wherein, The first tooth surface is oriented at a first angle relative to a first plane, the first plane including a transverse axis and the first axis and the second axis, the transverse axis being oriented perpendicular to the first longitudinal axis and the second longitudinal axis and the first axis and the second axis, and wherein the first recessed surface is oriented at a second angle relative to the first plane.

11. The connector according to claim 10, wherein, The second angle has a slope opposite to that of the first angle.

12. The connector according to claim 11, wherein, The value of the second angle is substantially the same as the value of the first angle.

13. The connector according to claim 11, wherein, The slope of the first angle is in the range of 10° to 70°, and the slope of the second angle is in the range of 10° to 70°.

14. The connector according to claim 1, wherein: The second tooth of the first segment aligns with the second recess of the second segment, and The second recess of the first segment is aligned with the second tooth of the second segment.

15. The connector according to claim 1, wherein, The second tooth surface is oriented at a third angle relative to the first plane, and the second recessed surface is oriented at a fourth angle relative to the first plane.

16. The connector according to claim 15, wherein, The third angle has a slope equal to but opposite to that of the first angle, and the fourth angle has a slope equal to but opposite to that of the second angle.

17. The connector of claim 13, further comprising: A first pair of shoulders, positioned adjacent to the first tooth and the first recess, each of the first pair of shoulders having a first shoulder surface; as well as The second pair of shoulders is positioned adjacent to the second tooth and the second recess, each of the second pair of shoulders having a second shoulder surface.

18. The connector according to claim 17, wherein, The first shoulder surface is oriented substantially parallel to the first plane, and the second shoulder surface is oriented substantially parallel to the first plane.

19. The connector according to claim 1, wherein, The first stop surface includes a first portion oriented at a fifth angle relative to a second plane, the second plane including the first longitudinal axis, the second longitudinal axis and the transverse axis, wherein the second stop surface includes a first portion oriented at a sixth angle relative to the second plane.

20. The connector according to claim 19, wherein, The sixth angle has a slope that is equal to but opposite to that of the fifth angle.

21. The connector according to claim 20, wherein, The first stop surface further includes at least one second portion oriented at a seventh angle relative to the second plane, and the second stop surface includes at least one second portion oriented at an eighth angle relative to the second plane.

22. The connector according to claim 21, wherein, The eighth angle has a slope that is equal to but opposite to that of the seventh angle.

23. The connector according to claim 21, wherein, The seventh angle has a slope opposite to that of the fifth angle, and the eighth angle has a slope opposite to that of the sixth angle.

24. The connector according to claim 1, wherein, Each of the first adjustable fastener and the second adjustable fastener includes a nut and a bolt.

25. The connector according to claim 1, wherein, Each of the segments includes a first and a second arcuate protrusion positioned on opposite sides of the segment, each of the first and second arcuate protrusions facing the central space, and each of the first and second arcuate protrusions being able to engage within a circumferential groove in the tubular element when the segments are pulled toward each other by the first and second adjustable fasteners.

26. The connector of claim 1, further comprising a seal positioned within the central space, the seal supporting the segment in a spaced relationship sufficient to allow the tubular element to be inserted into the central space without disassembling the connector.

27. A method of using the connector according to claim 1, the method comprising: Adjust the first adjustable fastener to pull the first segment and the second segment toward each other; Engage the first stop surface at the first end of the segment; Adjust the second adjustable fastener to pull the first segment and the second segment toward each other; as well as The second stop surface at the second end of the segment is engaged.

28. The method according to claim 27, wherein, Before adjusting the second adjustable fastener, the first stop surface at the first end of the segment engages.

29. The method according to claim 28, wherein, After the second stop surface engages, the connector is in the tightened state.

30. The method according to claim 29, wherein, The first segment and the second segment are aligned with an axis that is parallel to the first longitudinal axis and the second longitudinal axis and centered between the first longitudinal axis and the second longitudinal axis, and the alignment is maintained in the tightened state.

31. A connector for connecting pipe elements end-to-end, the connector comprising: A first segment and a second segment are attached end-to-end to each other to enclose a central space for receiving the tubular element. Each segment includes a first end and a second end, and each segment includes a first lug extending from its first end. A first adjustable fastener extends along a first longitudinal axis between the first lugs; as well as A hinge assembly that is attached to the second end of the first segment and the second segment; in Each of the segments further includes: A first inner surface, positioned between the central space and the first lug, the first inner surface including a first tooth and a first recess; and A first stop surface is positioned on the first lug, and a first adjustable fastener is positioned between the first inner surface and the first stop surface; wherein The first segment and the second segment can move toward each other into an tightened state; The first adjustable fastener is configured to pull the first segment and the second segment toward each other into the tightened state; and wherein In the tightened state: The first stop surface engages at the first end of the segment, and The first tooth of the first segment is at least partially received within the first recess of the second segment, and the first tooth of the second segment is at least partially received within the first recess of the first segment.

32. The connector according to claim 31, wherein, In the tightened state, there is a first gap between the first stop surface.

33. The connector according to claim 31, wherein, The first lug defines a first opening that surrounds a first axis oriented perpendicular to the first longitudinal axis of the first adjustable fastener and is positioned between the first inner surface and the first stop surface.

34. The connector according to claim 33, wherein, The first opening extends through the first lug.

35. The connector according to claim 31, wherein: The first tooth of the first segment aligns with the first recess of the second segment, and The first recess of the first segment is aligned with the first tooth of the second segment.

36. The connector according to claim 31, wherein, The first tooth surface is oriented at a first angle relative to a first plane, the first plane including a transverse axis and the first axis and the second axis, the transverse axis being oriented perpendicular to the first longitudinal axis and the second longitudinal axis and the first axis and the second axis, and wherein the first recessed surface is oriented at a second angle relative to the first plane.

37. The connector according to claim 36, wherein, The second angle has a slope opposite to that of the first angle.

38. The connector according to claim 37, wherein, The value of the second angle is substantially the same as the value of the first angle.

39. The connector according to claim 37, wherein, The slope of the first angle is in the range of 10° to 70°, and the slope of the second angle is in the range of 10° to 70°.

40. The connector of claim 31, further comprising: The first pair of shoulders are positioned adjacent to the first tooth and the first recess, each of the first pair of shoulders having a first shoulder surface.

41. The connector according to claim 40, wherein, The first shoulder surface is oriented substantially parallel to the first plane.

42. The connector according to claim 31, wherein, The first stop surface includes a first portion oriented at a fifth angle relative to a second plane, the second plane including the first longitudinal axis, the second longitudinal axis, and the transverse axis.

43. The connector according to claim 42, wherein, The first stop surface further includes at least one second portion oriented at a seventh angle relative to the second plane.

44. The connector according to claim 42, wherein, The seventh angle has a slope opposite to that of the fifth angle.

45. The connector according to claim 31, wherein, The first adjustable fastener includes a nut and a bolt.

46. ​​The connector according to claim 31, wherein, Each of the segments includes a first and a second arcuate protrusion positioned on opposite sides of the segment, each of the first and second arcuate protrusions facing the central space, and each of the first and second arcuate protrusions being able to engage within a circumferential groove in the tubular element when the segments are pulled toward each other by the first adjustable fastener.

47. The connector of claim 31, further comprising a seal positioned within the central space, the seal supporting the segment in a spaced relationship sufficient to allow the tubular element to be inserted into the central space without disassembling the connector.

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