Pump device with pump ring having curved contact portion

US10533419B2 · kind B2 · utility

Assignee

• ebm-papst St. Georgen GmbH & Co. KG · DE

Inventors

• Markus Braxmaier · Villingen-Schwenningen, DE
• Daniel Hauer · Ortenberg, DE
• Hassan Ghodsi-Khameneh · Offenburg, DE
• Juergen Herr · St. Georgen, DE
• Marc Jeuck · Laufenburg (Baden), DE
• Wolfgang Laufer · Schenkenzell, DE
• Mario Staiger · Tennenbronn, DE

Key dates

• Filing date: Mar 31, 2016
• Grant date: Jan 14, 2020
• Expiry date: Nov 2, 2036

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04C2240/30
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A pump device for pumping a liquid, has a hydraulics housing (12), in which a pump ring (14) with a contact surface (46), a pump ring support (16) and an eccentric (18), which can be driven by a shaft (20), are accommodated. The hydraulics housing (12) has an annular portion (22) and a first and a second lateral section (24, 26), the two lateral sections (24, 26) being arranged opposite each other. The pump ring (14) is mounted between the two lateral sections (24, 26) of the hydraulics housing (12) at least in some portions. The profile of the contact surface (46) has a contour with a curvature that changes at least in portions, and specifically in such a way that the curvature increases at least in some portions towards the ends of the contact surface (46).