Material-processing screw machine
US4600311A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1985 |
| Grant date | Jul 15, 1986 |
| Priority date | — |
| Expiry date | Mar 7, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/03
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The material-processing machine comprises at least a screw (11) driven in rotation inside a sleeve (1) and constituted by a central driving shaft (2) on which are mounted a plurality of screw elements (3) forming a stack of adjoining elements clamped between an abutment and clamping means placed respectively at the two ends of the shaft (2). The clamping means (4, 5) are arranged in such manner as to exert on the stack of screw elements (3) a prestressing force capable of opposing the separation of the screw elements (3) from each other in operation of the machine. The invention is especially applicable to the construction of screw extruders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.