Patent · US Expired

Magnetic linear drive

US4480202A · kind A · utility

7Cited by

3References

5Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Volkmar Leutner · Friolzheim, DE
Hans-Joachim Haase · Stuttgart, DE
Dietmar Meier · Tiefenbronn, DE
Roland Schempp · Leinfelden, DE
Berthold Pfuhl · Markgröningen, DE

Key dates

Filing date	Mar 1, 1983
Grant date	Oct 30, 1984
Priority date	—
Expiry date	Mar 1, 2003

Classification

Technology area (CPC H)Electricity
CPC primaryH01F2007/1684
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A magnetic linear drive includes an elongated cylindrical armature which is supported for axial displacement in a guiding pipe made of a pressure-resistant material. Two axially spaced solenoid windings are mounted on the guiding pipe and are interconnected by a permanent magnet. The solenoid windings are provided with lateral magnetically conducting cores the ends of which communicate with annular grooves formed in the guiding tube. The grooves are filled with a magnetically conductive material forming the poles of the electromagnet. In the region of the poles, the armature is formed with control flanges of different depths which are acted upon by the magnetic flux to impart the axial movement to the armature. One end of the armature is formed with a measuring flange which cooperates with measuring coils mounted on the guiding pipe.

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