Patent · US Expired

Apparatus for producing a reaction mixture of fluid components forming a foam or solid material

US4389375A · kind A · utility

6Cited by

3References

4Claims

0Family size

Assignee

Maschinenfabrik Hennecke GmbH · DE

Inventors

Ferdinand Proksa · Leverkusen, DE
Hans-Michael Sulzbach · Rübhausen, DE
Reiner Raffel · Siegburg, DE
Ferdinand Althausen · Neunkirchen, DE

Key dates

Filing date	May 11, 1981
Grant date	Jun 21, 1983
Priority date	—
Expiry date	May 11, 2001

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29B7/7404
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

Hydraulically coupled injection nozzles (5,28) and return nozzles (15,38) are used in an apparatus for producing a reaction mixture of fluid components forming foam or a solid material. These nozzles (5,15,28,38) comprise control pins (11,20,34,43) which are designed to be inserted into the openings (6,17,29,40) of the nozzles (5,15,28,38). The ratio between the distances which the control pins (11,20,34,43) travel outside and inside the orifices (6,17,29,40) is adjusted in such a way that, when the nozzles (5,15,28,38) are switched from "mixing" to "circulation" or vice versa, there is a time interval during which all the nozzles (5,15,28,38) are closed.

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