Patent · US Expired

Apparatus for discharging high viscosity media in chemical engineering

US4617089A · kind A · utility

5Cited by

6References

7Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Martin Ullrich · Leverkusen, DE
Manfred Hederich · Leverkusen, DE
Frank Wingler · Leverkusen, DE

Key dates

Filing date	Mar 19, 1985
Grant date	Oct 14, 1986
Priority date	—
Expiry date	Mar 19, 2005

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29C48/435
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The discharge apparatus comprises an at least four-shaft screw pump having engaging shafts (1,2,3,4) which rotate in opposite directions in pairs. The viscous product to be processed is caught up over a large area and removed by the screws. A double shaft screw pump is connected downstream of the actual collection zone as a pressure build-up zone. The two center screws (2, 3) of the collection zone merge equiaxially into the screw shafts (2a, 3a) of the pressure build-up zone. The collection zone and the pressure build-up zone are combined into one constructional unit. At least one screw shaft is driven. The resulting high viscosity product strands (7) are caught up by the screws in the collection zone and are moved on into the pressure build-up zone. The double shaft screw pump is used for the build up of a high operational pressure and thus provides the prerequisite for the subsequent connection of further procedural stages. The universal possibilities of use of this discharge apparatus are to be stressed in particular.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.