Connection device for blasting signal transmission tubing
US4998478A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 1, 1990 |
| Grant date | Mar 12, 1991 |
| Priority date | — |
| Expiry date | Mar 1, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42D1/043
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A connection device for blasting signal transmission tubing comprises a housing consisting of first and second hinged section (1, 2) provided with cooperating arcuate raised portions (3, 5) and grooves (4, 6) which, when the housing is closed, define first and second arcuate, circular-section channels, interconnected by a further channel (8). In use, first and second lengths of transmission tube are located in the arcuate channels and are partially cut by a blade (10) mounted in the connecting channel (8) to form apertures therein, whereby a portion of a blasting signal entering the connector via one of the tubes will spill out of that tube, traverse the connecting channel (8), and initiate a signal in each arm of the other tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.