Patent · US Expired

Gear machine having shaft toothing for driving a gear

US5496163A · kind A · utility

7Cited by

4References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Klaus Griese · Kupferzell, DE
Guido Bredenfeld · Erbach, DE
Horst Hesse · Stuttgart, DE

Key dates

Filing date	Jul 20, 1994
Grant date	Mar 5, 1996
Priority date	—
Expiry date	Jul 20, 2014

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/19679
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A gear machine (pump or motor) has two externally meshing gear pairs (21, 22) which are arranged so as to be offset relative to one another and are attached to a drive shaft (31) by a toothing (30), the number of teeth of the toothing (30) being an even-number multiple of the external teeth of the driven toothed wheels (16, 18). The toothing width (b) of the driven toothed wheels (16, 18) on the drive shaft (31) is smaller than their toothed wheel width (B), in particular smaller than one-half the toothed wheel width (B). This improves the mechanical characteristics of the gear machine its operating reliability. The invention can also be used with gear machines with only one gear pair (21a).

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