Fluid pump

US5785490A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Klaus Dobler · Gerlingen, DE
• Michael Huebel · Gerlingen, DE
• Willi Strohl · Beilstein, DE

Key dates

• Filing date: Oct 11, 1996
• Grant date: Jul 28, 1998
• Expiry date: Oct 11, 2016

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05B2250/503
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The fluid pump has a pump impeller provided with vanes and driven to revolve in a pump chamber that is defined by one wall portion each in the direction of the rotary axis of the pump impeller. In both wall portions, toward the pump impeller, there is an annular supply conduit and an outlet opening that discharges into one supply conduit. The outlet opening is defined in the rotational direction of the pump impeller by a wall which comes to an end in the form of an edge of the end face of the wall portion. The edge has an inner portion, which is inclined in the rotational direction relative to the rotary axis with respect to an imaginary radial arrangement. The inner edge portion is adjoined by an outer edge portion, which relative to an imaginary rectilinear lengthening of the inner edge portion extends farther in the rotational direction. As a result of this embodiment, an improved outflow from the supply conduit through the outlet opening has been obtained.