Apparatus for mixing and dispensing multiple-component substances

US5286105A · kind A · utility

Assignee

• Thera Patent GmbH & Co KG Gesellschaft fur Industrielle Schutzrechte · DE

Inventors

• Wolf-Dietrich Herold · Hechendorf, DE
• Gerd Brandhorst · Landsberg, DE
• Guenther Rehfeld · Dießen, DE

Key dates

• Filing date: Dec 23, 1991
• Grant date: Feb 15, 1994
• Expiry date: Dec 23, 2011

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B05C17/0103
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

An apparatus for mixing and dispensing two-component substances comprises o cartridges 12, 13 with pistons 15, 16 which are displaceable in the cartridges and are advanced in common by an electrical motor via a magnetic clutch 30. When the motor is switched off and the clutch 30 disengaged, the pistons 15, 16 may be manually retracted and re-advanced by means of a handwheel 33. At the end of the manual retracting motion, the pistons 15, 16 entrain a shaft 18 which serves to drive a mixer head 14, so that when the pistons 15, 16 become free of the cartridges 12, 13, the shaft 18 disengages from the mixer head 14. The cartridges 12, 13 including the mixer head 14 connected thereto may then be removed as a unit from the apparatus and replaced by another unit in order to exchange the emptied cartridges or, with the cartridges being still filled partially, to use the apparatus for preparing a different substance. Although the motor drive is designed for moving the pistons 15, 16 slowly, the manual retracting and advancing of the pistons renders an exchange of the cartridges rapid and unproblematic.