Method of making an hydraulically efficient ribbed pipe
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0870097
(1997-06-05)
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발명자
/ 주소 |
|
대리인 / 주소 |
Flehr Hohbach Test Albritton & Herbert LLP
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인용정보 |
피인용 횟수 :
4 인용 특허 :
0 |
초록
▼
A pipe formed from a continuous, cold rolled, lock seam quality, sheet steel, having a spiral rib. The pipe may be protected by an abrasion or corrosion resistant coating. The pipe is normally used for storm drains, culverts, sewer lines or HVAC. A closed spiral rib formed in the pipe wall adds stre
A pipe formed from a continuous, cold rolled, lock seam quality, sheet steel, having a spiral rib. The pipe may be protected by an abrasion or corrosion resistant coating. The pipe is normally used for storm drains, culverts, sewer lines or HVAC. A closed spiral rib formed in the pipe wall adds strength to the wall, while maintaining a smooth inner wall that promotes exceptionally good fluid flow. The pipe has a smooth interior surface with outwardly projecting structural ribs of helical configuration throughout the length of the pipe.
대표청구항
▼
[ I claim:] [1.] The method of forming a smooth flow metal pipe having a pipe wall including a substantially cylindrical wall, having an inner surface, said pipe wall also including a plurality of outer, integral reinforcing ribs spirally around the outer wall, whereby said plurality of reinforcing
[ I claim:] [1.] The method of forming a smooth flow metal pipe having a pipe wall including a substantially cylindrical wall, having an inner surface, said pipe wall also including a plurality of outer, integral reinforcing ribs spirally around the outer wall, whereby said plurality of reinforcing ribs are closed, said smooth flow metal pipe also having a means for joining the pipe wall into a continuous length of pipe, comprising the steps of:a) running a flat sheet of metal through a ten stand forming roll machine, each stand having a left, right and center position, including:i) a "V" former roll at stand 1,ii) a narrow "V" forming roll in the center position, plus one "V" forming roll in the left position and one "V" forming roll in the right position at stand 2,iii) a wide rib former in the center position plus one "V" forming roll in the left position and one "V" forming roll in the right position at stand 3,iv) a rib forming roll in the center position plus one narrow "V" forming roll in the left position and one narrow "V" forming roll in the right position at stand 5,v) a rib forming roll in the center position, a rib forming roll in the right position and a narrow "V" forming roll at stand 6,vi) a rib forming roll at the center, right and left positions of stand 7 for closing said plurality ribs formed on said smooth flow metal pipe,vii) a rib forming roll at the center, right and left positions of stand 8,viii) a rib forming roll at the center, right and left positions, plus a seam forming roll at stand 9, andix) a rib forming roll at the center, right and left positions, plus a seam forming roll at stand 10; andb) closing said closeable seam, thereby forming said smooth flow metal pipe.
이 특허를 인용한 특허 (4)
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Herman John T. ; Protas Michael J. ; Wagner Wayne M., Flexible hose and method for manufacturing.
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Carson Ken, Hydraulically efficient ribbed pipe and method of making thereof.
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Targiroff Alexandre, Inflatable tubular structure with spiral seam.
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Miller, Robert F., Ribbed spiral pipe.
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