Patent Number: 6,327,925

Title: Linear drive unit

Abstract: A linear drive unit has a threaded rod, and in combing engagement with samea threaded nut (2), from the outer circumference of which a number ofequally spaced cogs (3) project in a radial direction. Furthermore,connecting links (4, 5), which extend parallel to the axis of the threadedrod inside a housing, are driven via hydraulically or pneumaticallyactuated pistons, causing the connecting links (4, 5) to move in an axialdirection. During this oscillating movement the connecting links act uponcogs (3) that project from the threaded nut (2). The force exerted via thecogs (3) located on the outer circumference of the threaded nut (2) causesthe threaded nut (2) to be put into an incremental rotation, which, inturn, causes an incremental linear shifting of the threaded rod (1).

Inventors: Gombert; Bernd (Grafrath, DE), Willberg; Bertram (Schongeishing, DE)


International Classification: F16H 27/02 (20060101); F16H 27/00 (20060101); F16H 25/20 (20060101); F16H 025/20 ()

Expiration Date: 12/11/2014