Rotary extruder with a gear pump
US4813863A · kind A · utility
5Cited by
24References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1986 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | Feb 21, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/03
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Rotary extruder apparatus is provided comprising housing (22), recess (29) within housing (22), cylindrical rotor (30) rotatably mounted within recess (29) in housing (22), feed inlet (25), discharge outlet (52) providing fluid communication between recess (29) and diehead (26), in combination with gear pump (160) adapted to increase the pressure of material received from discharge outlet (52). Knurled rotor (30), undercut feed inlet (25), segmented rotor shafts (18, 18'), thrust rings (109, 109') made of dissimilar metals, and circumferentially spaced cartridge heaters (63) in housing (22) are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.