Title:
可撓性管状金属製装置
Document Type and Number:
Japanese Patent JP4426973
Kind Code:
B2
Abstract:
A flexible tubular device that includes a metal wall in which are formed corrugated convolutions that define corrugated outside and inside surfaces of the device. The convolutions are perpendicular to a longitudinal axis of the device, and each convolution has oppositely-disposed rounded top and bottom portions. The outside surface of the device has first and second sections with change positions therebetween. Each first section extends from one of the change positions to another via one of the top portions. Each second section extends from one of the change positions to another via one of the bottom portions. The length of each first section is at least 10% longer than the length of each second section. The outside surface has a curvature that is numerically smaller at the top portions than at the bottom portions, and changes sign only once at each change position.
Inventors:
Petersen, Henry
Olsen, Soren Bee
Nielsen, Carl Bryan
Olsen, Soren Bee
Nielsen, Carl Bryan
Application Number:
JP2004552689A
Publication Date:
March 03, 2010
Filing Date:
November 17, 2003
Export Citation:
Assignee:
NORSK HYDRO ASA
International Classes:
F16L9/06; F16L11/15; F16L27/11
Domestic Patent References:
| JP2001341230A | ||||
| JP61116015A | ||||
| JP51006754U |
Foreign References:
| US3561492 | ||||
| US4246937 | ||||
| US5803132 | ||||
| US6006788 |
Attorney, Agent or Firm:
Michiharu Soga
Hidetoshi Furukawa
Suzuki Kenchi
Kajinami order
Hidetoshi Furukawa
Suzuki Kenchi
Kajinami order