Patent · US Expired

Method of manufacturing a hollow spindle

US5881946A · kind A · utility

1Cited by

3References

8Claims

0Family size

Assignee

Mannesmann AG · DE

Inventors

Franz Curten · Langenfeld, DE
Dieter Wittenberg · Dortmund, DE
Martin Kiessling · Burbach, DE
Günter Mally · Hamm, DE

Key dates

Filing date	Mar 10, 1997
Grant date	Mar 16, 1999
Priority date	—
Expiry date	Mar 10, 2017

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01L1/18
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A method of manufacturing a hollow spindle, especially for the pivotal mounting of valve-actuating levers to control exhaust-and-intake valves of an internal combustion engine. The spindle has an outer tube, in the interior of which a shaped tubular body is fixed in order to form at least two liquid-carrying chambers. To form a chamber, the tubular body is provided with a cutout extending in the longitudinal direction. The tubular body is a shaped inner tube that, seen in cross-section, has an inwardly-curved region that makes a rounded and stepless transition to the circular region, and of the tubular body. At least the circular region is joined by virtue of its material to the outer tube.

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