Barrel pump having a follower plate with an adjustable sealing ring

US11034575B2 · kind B2 · utility

Assignee

• Atlas Copco IAS GmbH · DE

Inventors

• Thomas Hausner · Bretten, DE
• Gerrit ENDERLE · Knittlingen, DE
• Siegmund Oberhofer · Pforzheim, DE

Key dates

• Filing date: Aug 15, 2017
• Grant date: Jun 15, 2021
• Expiry date: Mar 14, 2038

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B05C11/10
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A method for conveying viscous material out of a barrel-like container open towards the top and having a bottom and a circumferential wall extending from bottom to top, uses a device having a follower plate for closing the container. The plate has a circumferential wiper ring having a radially outwardly protruding contact portion for contacting an inner container wall face facing the plate. A variable pressing force can be applied to press the contact portion against the inner face. The plate, following a decreasing material level and resting on the material surface, is moved bottomward, and, after the container is emptied, is moved away from the bottom, and the contact portion is pressed sealingly against the inner face while the plate moves bottomward. The sealing effect between the wiper ring and the container wall is suspended during plate movement away from the bottom by reducing the pressing force.