Patent · US Expired

Pump

US7270048B2 · kind B2 · utility

0Cited by

5References

9Claims

0Family size

Assignee

KNF Neuberger GmbH · DE

Inventors

Erich Becker · Springe, DE
Erwin Hauser · Emmendingen, DE

Key dates

Filing date	Mar 12, 2003
Grant date	Sep 18, 2007
Priority date	—
Expiry date	Jun 7, 2023

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04B53/16
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A pump (1) with an oscillating part having a housing (2) with a working chamber (3) and a crankcase (4) defined from the working chamber by the pump part. A pump drive mechanism (6) with a drive shaft (7) is located inside the crankcase (4) and the drive shaft is mounted on bearings (8, 9) that are arranged in the walls of the crankcase. The pump has a suction inlet separate from the crankcase. The pump (1) includes at least one flow channel in the crankcase wall for compensating pressure in the crankcase when the pump part oscillates and a flow damper arranged in the at least one flow channel. In a preferred embodiment, the at least one passage hole having at least one bearing therein is configured as the flow channel.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.