IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0018597
(2004-12-21)
|
등록번호 |
US-7726700
(2010-06-22)
|
우선권정보 |
CA-2459637(2004-02-27) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
Wood, Phillips, Katz, Clark & Mortimer
|
인용정보 |
피인용 횟수 :
6 인용 특허 :
32 |
초록
▼
A coupling for connecting pipes to externally threaded fittings and stubs. The coupling comprises a coupling body, a gripper, gripper engagement means for causing the gripper to engage the pipe, a gasket, gasket engagement means for causing the gasket to seal around the pipe, gripper retention means
A coupling for connecting pipes to externally threaded fittings and stubs. The coupling comprises a coupling body, a gripper, gripper engagement means for causing the gripper to engage the pipe, a gasket, gasket engagement means for causing the gasket to seal around the pipe, gripper retention means for retaining the gripper within the interior of the coupling body during handling thereof, and gasket retaining means for retaining the gasket within the interior of the coupling body during handling thereof.
대표청구항
▼
The invention claimed is: 1. A coupling creating a fluid-conducting connection between a pipe and a stub, said coupling comprising: a coupling body having a forward end for being secured to the stub, a rearward end for receiving the pipe, and an internal bore therethrough; stub securing means for s
The invention claimed is: 1. A coupling creating a fluid-conducting connection between a pipe and a stub, said coupling comprising: a coupling body having a forward end for being secured to the stub, a rearward end for receiving the pipe, and an internal bore therethrough; stub securing means for securing the forward end of the coupling body to the stub; a gripper located within the internal bore of said coupling body for gripping the pipe; gripper retaining means for retaining said gripper within said coupling body during handling of the coupling body in a condition where there is no stub and no pipe connected in the coupling; a gasket located within the internal bore of said coupling body for creating a seal around the pipe; gasket retaining means for retaining said gasket within said coupling body during handling of the coupling body in a condition where there is no stub and no pipe connected in the coupling; gripper engaging means for causing the gripper to grip the pipe; gasket engaging means for causing the gasket to create a seal around the pipe; and wherein the coupling body is a unitary component and the gasket retaining means is a gasket retaining recess formed in an interior surface of the coupling body for receiving at least a portion of said gasket therein. 2. The coupling of claim 1 wherein the gripper retaining means is a gripper retaining recess formed in an interior surface of the coupling body for receiving at least a portion of said gripper therein. 3. The coupling of claim 2 wherein the gripper retaining recess is a circumferential groove formed in the interior surface of the coupling body. 4. The coupling of claim 2 wherein the gripper has a radially exterior protrusion for being received within the gripper retaining recess. 5. The coupling of claim 1 wherein the gasket retaining recess is a circumferential groove formed in the interior surface of the coupling body. 6. The coupling of claim 1 wherein the gasket has a radially exterior protrusion for being received within the gasket retaining recess. 7. The coupling of claim 1 wherein the gripper is sized to fit between an interior surface of the coupling body and an outer surface of the pipe once the pipe is received within the rearward end of the coupling body. 8. The coupling of claim 1 wherein the gripper is an annular ring having fingers extending rearwardly therefrom. 9. The coupling of claim 8 wherein the gripper has at least three fingers spaced circumferentially around the annular ring. 10. The coupling of claim 8 wherein the gripper has at least five fingers spaced circumferentially around the annular ring. 11. The coupling of claim 8 wherein the gripper has at least eight fingers spaced circumferentially around the annular ring. 12. The coupling of claim 8 wherein each of the fingers of the gripper has a neck of reduced thickness in a radial direction and a head located rearwardly of the neck. 13. The coupling of claim 12 wherein the neck of each of the fingers is resilient allowing the head attached to it to be resiliently displaced radially inwardly. 14. The coupling of claim 13 wherein the head of each of the fingers has at least one tooth on its radially inner surface for gripping the pipe. 15. The coupling of claim 13 wherein the head of each of the fingers has a radially external protrusion, and the gripper retaining means comprises a circumferential groove formed in an interior surface of the coupling body and the engagement of the radially external protrusion of the head of each of the fingers with said circumferential groove. 16. The coupling of claim 13 wherein a rearward surface of each of said heads is sloped such that an axial length of said head is greater at a radially interior surface, than at a radially exterior surface, the coupling body has an annular constriction at its rearward end sized to closely fit over the pipe, the forward surface of said annular construction being sloped so as to substantially match the slope of the rearward surface of each of said heads, said gripper engagement means comprising positioning the gripper with its sloped rearward surface abutting the sloped forward surface of the annular constriction of the coupling body, and applying a compressive force between the gripper and the annular construction such that the heads of the fingers of the gripper are resiliently urged radially inwardly as the gripper moves rearwardly and the sloped rearward surface of the gripper slides along the sloped forward surface of the annular constriction, causing at least one tooth on an interior surface of said heads to grip an outer surface of the pipe. 17. The coupling of claim 16 wherein the head of each of the fingers has a radially external protrusion, and the gripper retaining means comprises a circumferential groove formed in an interior surface of the coupling body, the engagement of the radially external protrusion of the head of each of the fingers with said circumferential groove, and the abutting of the sloped rearward surface of the head against the sloped forward surface of the annular constriction. 18. The coupling of claim 1 wherein the gasket is an annular ring. 19. The coupling of claim 1 wherein the gasket is sized to fit between an interior surface of the coupling body and an outer surface of the pipe once the pipe is received within the rearward end of the coupling body. 20. The coupling of claim 1 wherein the gasket is positioned within the coupling body forward of, and abutting against, the gripper. 21. The coupling of claim 1 wherein the stub securing means comprises an interior surface of a forward portion of the coupling body being sized and threaded to threadedly engage an external threading of the stub. 22. A coupling creating a fluid-conducting connection between a pipe and a stub, said coupling comprising: a coupling body having a forward end for being secured to the stub, a rearward end for receiving the pipe, and an internal bore therethrough; stub securing means for securing the forward end of the coupling body to the stub; a gripper located within the internal bore of said coupling body for gripping the pipe; gripper retaining means for retaining said gripper within said coupling body during handling of the coupling body in a condition where there is no stub and no pipe connected in the coupling; a gasket located within the internal bore of said coupling body for creating a seal around the pipe; gasket retaining means for retaining said gasket within said coupling body during handling of the coupling body in a condition where there is no stub and no pipe connected in the coupling; gripper engaging means for causing the gripper to grip the pipe; gasket engaging means for causing the gasket to create a seal around the pipe; and wherein the gasket engagement means comprises a sloped rearward surface on said gasket such that an axial length of the gasket at an interior surface is greater than that at an exterior surface, a sloped forward surface on said gripper which substantially matches the slope of said sloped rearward surface of said gasket, positioning the gasket immediately forward of a forward end of said gripper such that the sloped rearward surface of said gasket abuts against said sloped forward surface of said gripper, and applying a compressive force between the, gasket and the gripper such that the gasket is urged tightly against the outer surface of the pipe by a cooperation between the sloped rearward surface of the gasket and the sloped forward surface of the gripper. 23. A coupling creating a fluid-conducting connection between a pipe and a stub, said coupling comprising: a coupling body having a forward end for being secured to the stub, a rearward end for receiving the pipe, and an internal bore therethrough; stub securing means for securing the forward end of the coupling body to the stub; a gripper located within the internal bore of said coupling body for gripping the pipe; gripper retaining means for retaining said gripper within said coupling body during handling of the coupling body; a gasket located within the internal bore of said coupling body for creating a seal around the pipe; gasket retaining means for retaining said gasket within said coupling body during handling of the coupling body; gripper engaging means for causing the gripper to grip the pipe; gasket engaging means for causing the gasket to create a seal around the pipe; and an adapter having a forward end and a rearward end, positioned forward of both the gripper and the gasket; wherein the rearward end of the adapter is an annular outer flange sized to fit between an interior surface of the coupling body and an outer surface of the pipe once the pipe is received within the rearward end of the coupling body; wherein a rearward surface of said outer flange of said adapter abuts against a forward surface of the gasket; and wherein the gasket engagement means comprises a sloped forward surface on said gasket such that an axial length of the gasket at an interior surface is greater than that at an exterior surface, a sloped rearward surface on the outer flange of the adapter which substantially matches the slope of said sloped forward surface of said gasket, positioning the adapter immediately forward of a forward end of said gasket such that the sloped forward surface of said gasket abuts against said sloped rearward surface of said outer flange, and applying a compressive force between the adapter and the gasket such that the gasket is urged tightly against the outer surface of the pipe by a, cooperation between the sloped forward surface of the gasket and the sloped rearward surface of the outer flange. 24. The coupling of claim 23 wherein the gasket engagement means further comprises a sloped rearward surface on said gasket such that an axial length of the gasket at an interior surface is greater than that at an exterior surface, a sloped forward surface on said gripper which substantially matches the slope of said sloped rearward surface of said gasket, positioning the gasket immediately forward of a forward end of said gripper such that the sloped rearward surface of said gasket abuts against said sloped forward surface of said gripper, and applying a compressive force between the gasket and the gripper such that the gasket is urged tightly against the outer surface of the pipe by a cooperation between the sloped rearward surface of the gasket and the sloped forward surface of the gripper. 25. A coupling for creating a fluid-conducting connection between a pipe and a stub, said coupling comprising: a unitary coupling body having a forward end for being secured to the stub, a rearward end for receiving the pipe, and an internal bore therethrough; stub securing means for securing the forward end of the coupling body to the stub; a gripper located within the internal bore of said coupling body for gripping the pipe; a gasket located within the internal bore of said coupling body for creating a seal around the pipe; said internal bore of said coupling body having a shoulder engagable with a shoulder on the gripper and located between the shoulder on the gripper and said forward end of said coupling body, said internal bore further including a frustoconical surface engageable with a corresponding frustoconical surface on said gripper and located between said frustoconical surface on said gripper and said rearward end of said coupling body, said internal bore further including an annular groove receiving a protrusion extending radially outwardly from said gasket to retain said gasket within the coupling body.
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