Patent · US Expired

Linear drive unit

US6327925A · kind A · utility

16Cited by

9References

11Claims

0Family size

Assignee

DEUTSCHES ZENTRUM FÜR LUFT—UND RAUMFAHRT E.V. · DE

Inventors

Bernd Gombert · Fürstenfeldbruck, DE
Bertram Willberg · Fürstenfeldbruck, DE

Key dates

Filing date	Nov 25, 1998
Grant date	Dec 11, 2001
Priority date	—
Expiry date	Nov 25, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/18992
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A linear drive unit has a threaded rod, and in combing engagement with same a threaded nut (2), from the outer circumference of which a number of equally spaced cogs (3) project in a radial direction. Furthermore, connecting links (4, 5), which extend parallel to the axis of the threaded rod inside a housing, are driven via hydraulically or pneumatically actuated pistons, causing the connecting links (4, 5) to move in an axial direction. During this oscillating movement the connecting links act upon cogs (3) that project from the threaded nut (2). The force exerted via the cogs (3) located on the outer circumference of the threaded nut (2) causes the threaded nut (2) to be put into an incremental rotation, which, in turn, causes an incremental linear shifting of the threaded rod (1).

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