[특허]Corrugated plastic pipe sections having flanged ends and structurally tight joints thereof

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특허 상세정보

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Corrugated plastic pipe sections having flanged ends and structurally tight joints thereof

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16L-023/00
미국특허분류(USC)	285/364; 285/365; 285/406; 285/407; 285/408; 285/903
출원번호	US-0698601 (2003-10-31)
발명자 / 주소	Starita, Joseph M.
대리인 / 주소	Porter, Wright, Morris &
인용정보	피인용 횟수 : 9 인용 특허 : 16

초록

Rigid corrugated plastic pipe sections are provided with a flange radially extending from at least one end of the pipe length, which allows structural and water tight joints between connecting flanged pipes and fittings to be formed in an assembly including a peripheral clamp and gasket, and a system, method and kit for effecting structural and water tight joints in corrugated plastic pipe pipes.

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1. An assembly of collinearly aligned sections of large diameter corrugated plastic pipes that are buried in a trench comprising a plurality of separate lengths of connected pipes wherein: A) the end of a first pipe length abuts the end of a second pipe length, and each pipe length includes a flange radially extending from the abutting ends of the pipe lengths, and each flange radially extends from the valley of the corrugation in the pipe immediately preceding the end and does not transversely extend into a crest, and B) a circumferential clamp is disposed about the abutting flanges to form a joint between the pipe lengths, the clamp having sides adapted to embrace the sides of the flanges and the sides of the clamp do not radially extend to the valleys of the corrugations in the pipes immediately adjacent the flanges.2. The assembly of claim 1 in which the clamp includes an interior channel providing an inside clearance between the inside radius of the clamp and the sides of the flanges.3. An assembly of collinearly aligned sections of large diameter corrugated plastic pipes that are buried in a trench comprising a plurality of separate lengths of connected pipes, wherein: A) the end of a first pipe length faces the end of a second pipe length, and 1) each pipe length includes a flange radially extending from each facing end of the pipe and 2) each flange is formed from a circumferential portion of an end corrugation of the pipe and extends radially from the valley of the corrugation in the pipe immediately preceding the end and the end portion of the flange does not substantially extend along or parallel to the pipe length; B) a circumferential clamp is disposed about the facing flanges to form a joint between the pipe lengths, the clamp having sides adapted to embrace the sides of the flanges and the sides of the clamp do not radially extend to the valleys of the corrugations in the pipes immediately adjacent the flanges; and C) a gasket is interposed between the flanged ends of the pipe lengths.4. The assembly of claim 3 in which the gasket, in longitudinal cross section, has a shape essentially in correspondence with the facing flanges of pipe lengths.5. The assembly of claim 3 in which the gasket, in longitudinal cross section, is wedge shaped.6. The assembly of claim 3 in which the gasket comprises an “O” ring.7. The assembly of claim 1 or 3 in which the clamp provides a compressive force to the flanges and the relationship of the clamp and the flanges is such that the diameters of the damp and the flanges, when the damp is tightened, provide a) a clearance between the outside circumference of the flanges and the inside circumference of the clamp and b) a clearance between the sides of the clamp and the valleys of the corrugations in the pipes immediately adjacent the flanges.8. The assembly of claim 7 in which the sides of the clamp form a channel and the channel includes opposite sides extending radially toward each other from the inside radius of the clamp.9. The assembly of claim 7 in which the sides of the clamp form a channel and the channel includes opposite sides radially extending away from each other from the inside radius of the clamp.10. The assembly of claim 1 or 3 in which the inside diameter of the circumference of the clamp is greater than the outside diameters of the flanges joined.11. The assembly of claim 1 or 3 in which the pipe lengths include a plastic liner and a portion of the flange is formed from the material of the liner.12. The assembly or claim 1 or 3 in which the pipes are formed from HDPE.13. The assembly of claim 1 or claim 3 in which the clamp is formed from a stainless steel.14. The assembly of claim 1 or 3 in which an additional length of pipe having a flanged end is disposed in facing relationship with a fitting having a cooperative flange and an additional clamp is disposed about the flanged end of the additional pipe and the flange of the fitting to form a joint.15. A system for joining collinearly aligned sections of large diameter corrugated plastic pipes comprising: forming a circumferential flange integrally and radially extending from the valley of the corrugation at the end of a first pipe section, forming a circumferential flange integrally and radially extending from the valley of the corrugation at the end of a second pipe section such that the end portion of the flange does not substantially extend along or parallel to the pipe length; positioning the flange at the end of the first pipe section in a facing relationship with the flange at the end of the second pipe section, joining the facing flanges with a circumferential clamp having sides that do not radially extend to the valleys of the corrugations in the pipes immediately adjacent the flanges, the clamp having an interior channel providing an inside clearance between the inside radius of the clamp and the outer circumference of the flanges, and burying the pipe sections in a trench.16. The system of claim 15 in which the pipe sections are formed from HDPE.17. The system of claim 15 including positioning a gasket in alignment with and between the facing flanges before the flanges are joined by the clamp.18. A method for joining collinearly aligned sections of large diameter corrugated plastic pipes comprising: forming a circumferential flange integrally and radially extending from the valley of the corrugation at the end of a first pipe section such that the end portion of the flange does not substantially extend along or parallel to the pipe length, forming a circumferential flange integrally and radially extending from the valley of the corrugation at the end of a second pipe section such that the end portion of the flange does not substantially extend along or parallel to the pipe length, positioning the flange at the end of the first pipe section in a facing relationship with the flange at the end of the second pipe section, and joining the facing flanges with a circumferential clamp having sides that do not radially extend to the valleys of the corrugations in the pipes immediately adjacent the flanges, and burying the pipe sections in a trench.19. The method of claim 18, including inserting a gasket in alignment with the flanges as the flanges are positioned in the facing relationship, and wherein applying the clamp compresses the assembly of the gasket and flanges and the clamp allows an internal radial clearance between the clamp and the outside circumference of the flanges.20. The method of claim 18 wherein the pipe sections include a liner.21. The method of claim 18 for joining HDPE corrugated plastic pipe.22. The method of claim 18 in which the forming of the flanges of the first and second pipe sections includes cutting the sections from a given length of pipe at a longitudinal location between the valley of the end corrugation of the given length of pipe and the crest of the end corrugation.23. A kit of collinearly aligned sections of large diameter corrugated plastic pipes provided in predetermined lengths that are to be buried in a trench in which 1) a plurality of separate lengths of pipe are connected to each other or 2) a length of pipe is connected to a fitting, comprising a first large diameter corrugated plastic pipe having a flange radially extending from the valley of the corrugation in the pipe immediately preceding the end of the pipe such that the end portion of the flange does not substantially extend alone or parallel to the pipe length, and a second large diameter corrugated plastic pipe or fitting having a flange immediately preceding the end of the pipe or fitting, the flanges adapted to abut one another in facing relationship, a peripheral clamp for disposition about the abutting flanges to form a joint between 1) the pipe lengths or the oboe length and the fitting, the clamp having sides adapted to embrace the sides of the flanges and the sides of the clamp do not radially extend to the valleys of the corrugations in the pipes or pipe and fitting immediately adjacent the flange when the clamp is disposed about the flanges.24. The kit of claim 23 in which at least one pipe length or fitting includes a compressible annular elastomeric gasket having a surface profile essentially corresponding to the surface area of the pipe's or the fitting's flange.25. The kit of claim 24 in which the gasket is an “O” ring having first and second side surfaces for disposition between the flanges and the surfaces of the “O” ring facing the flanges correspond to the surfaces of the flanges at the pipe or fitting ends.26. The kit of claim 23, claim 24, or claim 25 including a field cut length of pipe.27. The kit of claim 23 in which the first pipe is an HDPE pipe.28. The kit of claim 27 in which the clamp is formed from a stainless steel.29. The kit of claim 23 further including a second fitting having a flanged end cooperative with a flange at an end of an additional pipe and a second clamp for disposition with respect to the flange of the second fitting and the flange of the additional pipe.

이 특허에 인용된 특허 (16)

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Corrugated plastic pipe sections having flanged ends and structurally tight joints thereof

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특허 상세정보

Corrugated plastic pipe sections having flanged ends and structurally tight joints thereof

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이 특허에 인용된 특허 (16)

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