The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 11, 2001
Filed:
Nov. 25, 1998
Bernd Gombert, Grafrath, DE;
Bertram Willberg, Schöngeishing, DE;
Abstract
A linear drive unit has a threaded rod, and in combing engagement with same a threaded nut (,), from the outer circumference of which a number of equally spaced cogs (,) project in a radial direction. Furthermore, connecting links (,), 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 (,) to move in an axial direction. During this oscillating movement the connecting links act upon cogs (,) that project from the threaded nut (,). The force exerted via the cogs (,) located on the outer circumference of the threaded nut (,) causes the threaded nut (,) to be put into an incremental rotation, which, in turn, causes an incremental linear shifting of the threaded rod (,).