Helicoidal ramp dropshaft
US4790355A · kind A · utility
15Cited by
7References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 23, 1987 |
| Grant date | Dec 13, 1988 |
| Priority date | — |
| Expiry date | Mar 23, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A vertical dropshaft having internal helicoidal ramps for dissipating the energy of liquid passing through the dropshaft and for exhausting air entrained by the falling liquid up the center of the dropshaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.