Actuatable dosing mechanism

US4565302A · kind A · utility

Assignee

• Ing. Erich Pfeiffer GmbH & Co KG · DE

Inventors

• Peter Pfeiffer · Eppelheim, DE
• Leo Maerte · Sipplingen, DE

Key dates

• Filing date: Jan 13, 1984
• Grant date: Jan 21, 1986
• Expiry date: Jan 13, 2004

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F13/008
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A dosing mechanism in the form of a manually operable, single-acting piston pump, which dispenses a given quantity of a substance, e.g. in atomized form, during each actuating stroke has a counter. For this purpose, a counting ring mounted in rotary manner on a base part is provided, which is advanced by one step per actuating stroke by an indexing device with cooperating and correspondingly bevelled ribs, so that in each case a different character in the counting ring appears at a window in the actuating pusher casing. Two projections cooperating with one another in a given position of the counting ring form a locking device against further actuation of the atomizing pump, when a given number of strokes have been performed.