Screw press for mechanically separating liquids from mixtures of liquids and solids
US4581992A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 10, 1981 |
| Grant date | Apr 15, 1986 |
| Priority date | — |
| Expiry date | Nov 10, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB30B9/122
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A screw press for extracting liquids from liquid-solid mixtures continuously and in a single operation. The press comprises a barrel divided into a feed section and a pin-barrel section. A rotatable screw is disposed in the barrel. Grooves are provided in the feed section to ensure a good feed input and hence an economical throughput, the pin-barrel section including radial pins extending into the barrel which, together with the rotation of the screw cause a high pressure to build up in the barrel thereby comminuting the mixture. The screw has helical flights formed thereon, the flights defining ridges, radial bores being formed in the ridges which communicate with an axial bore formed in the screw permitting the draining away the extracted liquid directly from the region in which it is extracted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.