Apparatus for processing oilseed and grain mash products
US4361081A · kind A · utility
Inventor
Key dates
| Filing date | Aug 11, 1980 |
| Grant date | Nov 30, 1982 |
| Priority date | — |
| Expiry date | Aug 11, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB30B15/34
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An extruder for oilseed products, grain mash, and other materials includes an elongated screw rotatably disposed in a bore formed in a tubular housing. The screw is characterized by a plurality of separate threads of progressively decreasing pitch toward a discharge end of the screw. The separate threads are spaced apart and thread portions of constant pitch include gaps to provide clearance for radially inwardly projecting pins disposed in the housing and projecting into the material flow path for mixing the material to prevent solidification thereof and clogging of the extruder. The screw shaft includes spaced apart annular collars which comprise backflow dams for the material being conveyed through the extruder. The tubular extruder housing is of modular construction and is adapted to be used with various combinations of tubular inserts and a plurality of stacked annular rings forming the extruder bore. The rings are provided with radially extending channels for draining liquid being extruded from the material out of the bore. The extruder is provided with spaced apart electrical resistence heating elements disposed on the housing for heating the material being extruded. Tempera…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.