Mine ventilation system and elements thereof
US4175481A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 5, 1977 |
| Grant date | Nov 27, 1979 |
| Priority date | — |
| Expiry date | Jul 5, 1997 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21F1/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
This invention relates to a ventilation system and more particularly to means for restraining a ventilation control curtain composed of a post like members formed of an elongate containers of flexible material filled with material such as mine debris which give them a degree of rigidity and mass. The post like constraining members check the horizontal displacement of the mine curtain thereby forming a stable curtain structure which may be used as an efficient gas flow director within the mine or to isolate a desired area of the mine to contain mine gas or airborn particulates. They are sufficiently yieldable to offer no collision hazzard to personnel or machinery. The envelopes forming curtain constraints are disclosed as individual elements and as integral pockets on the face of the curtain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.