Barrel for a material treating machine
US5215373A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 8, 1991 |
| Grant date | Jun 1, 1993 |
| Priority date | — |
| Expiry date | Jul 8, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2948/92876
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The barrel (20) comprises at least two intersecting lobes (21a,21b) of cylindrical bores having parallel axes each corresponding to a screw and defining in the region of their intersection at least two longitudinal parallel edges (22). Each lobe comprises at least one shearing zone (23a,23b) adapted to cooperate with a shearing element mounted on the respective screws. The shearing zone (23a,23b) of each lobe is formed by least one groove (24a,24b) extending in the direction of the flow of the material and provided on the inner side of the barrel (20), the groove providing therebetween and each edge (22) a portion of a continuous surface of the cylindrical bore forming the corresponding lobe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.