Angular member for seismic cables towed by a vessel
US4756268A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1987 |
| Grant date | Jul 12, 1988 |
| Priority date | — |
| Expiry date | Feb 17, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63B21/66
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An angular member provided on seismic cables towed by a vessel and laterally displaced in parallel and in relation to the course of the vessel comprises a frame at least partly enclosing the cable in the area of angular deflection between an inner cable portion extending obliquely to the towing direction and the active main cable portion. The frame is formed of two frame plates secured in spaced relationship and having at the lead-in end for the cable a cable-fastening device and at the other end a pivotable ramp swingable in the plane of the frame plates. The ramp has a further fastening device for the cable. Another fastening device is pivotably connected to the frame plates for connecting thereto a wire to a paravane or the like. When towed in the water the angular member absorbs most of the forces normally exerted on the cable at the area of angular deflection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.