Dual passage pipe for cycling water to an undersea mineral aggregate gathering apparatus
US4149739A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 18, 1977 |
| Grant date | Apr 17, 1979 |
| Priority date | — |
| Expiry date | Mar 18, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L39/005
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A dual passage string of pipe for use in cycling fluid from a ship to an undersea mineral aggregate gathering apparatus. The string of pipe is made up of sections of concentric inner and outer pipes. The outer pipes are screwed together and the inner pipes slide telescopingly within each other. The inner pipes are suspended in the outer pipes at their upper ends by a rigid supporting ring supported by an internal shoulder in the outer pipe. The internal shoulder is located at the base of the threads and is separated from the lower end of the male threaded section. A resilient seal ring is carried between the supporting ring and the male threaded section for preventing water from entering the threads to avoid corrosion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.