Magnetic drive metering pump

US8267667B2 · kind B2 · utility

Assignee

• Prominent Dosiertechnik GmbH · DE

Inventors

• Thomas Freudenberger · Ludwigshafen, DE
• Andreas Hoehler · Hanau, DE

Key dates

• Filing date: Aug 21, 2006
• Grant date: Sep 18, 2012
• Expiry date: Jun 1, 2029

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04B2201/0202
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A magnetic drive metering pump in which a movable thrust member is fixed to a diaphragm and is axially movable in a magnet shroud. The thrust member, on electrically actuating the magnet shroud, is drawn into the magnet shroud against the force of a recuperating spring, and after deactivating the magnet shroud, is returned to a starting position. The diaphragm cooperates alternately with an outlet and an inlet valve to produce a pump stroke in a pump metering head. The magnetic drive metering pump has a reference element associated with the thrust member and diaphragm, the position of which reference element is detected by a positional sensor. The positional sensor provides a signal which has a fixed relationship to the position of the reference element, and the motion of the thrust member is controlled by a control circuit such that it follows a predetermined nominal profile.