Arrangement for extraction of harmful gases from workplaces
US5482505A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 5, 1994 |
| Grant date | Jan 9, 1996 |
| Priority date | — |
| Expiry date | Jul 5, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB08B15/002
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An arrangement for the extraction of harmful gases from workplaces, the arrangement (1) exhibiting a carrier arm system (9) having at least two arms (19, 20, 21) connected telescopically with each other so that the carrier arm system (9) can be given different lengths, whereby the carrier arm system (9) is swivelable around a horizontal spindle (17) so that it can be swivelled in a vertical direction and placed in different positions between a downward-directed, preferably substantially vertical end position and an outward-directed preferably substantially horizontal end position. In order to permit the necessary balancing of both the swivelling and positioning of the carrier arm system (9) and the telescoping function of the arms of the carrier arm system (9) when the carrier arm system (9) is swivelled within a large sector, at least one first device (22) is arranged to generate balancing forces in order to facilitate swivelling of the carrier arm system (9) in the vertical direction between the end positions and/or to facilitate the retention of the carder arm system (9) in set positions between the end positions, and at least one second device (28) is arranged to generate balan…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.