Patent · US Expired

Positioning device for scanning means in a disk drive unit

US4626944A · kind A · utility

1Cited by

3References

10Claims

0Family size

Assignee

BASF SE

Inventors

Joachim Hack · Ludwigshafen, DE
Klaus Schulze-Berge · Ludwigshafen, DE
Klaus Birkenmeier · Appenweier, DE

Key dates

Filing date	Jun 10, 1983
Grant date	Dec 2, 1986
Priority date	—
Expiry date	Jun 10, 2003

Classification

Technology area (CPC G)Physics
CPC primaryG11B21/08
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A positioning device, comprising a cylindrical guide element and a guide surface, is so designed that an angle of less than 90.degree., especially of from 1.degree. to 80.degree., is formed between an axis at right angles to the direction of movement of the guide element over the guide surface and the axis of rotation of the guide element, in the plane containing these two axes. The peripheral surface of the guide element can be grooved or convex. The novel positioning device can be used with advantage in any type of recording/playback apparatus for disk records.

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