Zahnradfabrik Friedrichshafen, Ag.

Zf Friedrichshafen Ag

Hubert Lehle

Jurgen Pohlenz

Herbert Simon

Franz Muller

Rudolf Schneider

Erwin Baur

Josef Dietenberger

Edwin Baur

Hydrostatic-mechanical power distribution transmission

Gear change box with multiple steps

Multi-stage speed-change gear

Disk set with spreading devices for clutches or brakes

A claw clutch (42) is added in line to a multiple-disc clutch 40. One actuating member 21 engages first the claw clutch 42 and then, almost simultaneously, the multiple-disc clutch 40. Return springs 37 disengage first the multiple-disc clutch 40 and then, almost simultaneously, the claw clutch 40. The multiple-disc clutch 40 can be engaged under full power. A dangerous drag moment of the multiple-disc clutch 40 is active only for a very short time when the clutch system is just being disengaged, immediately thereafter only the harmless redidual moment of the claw clutch 42 remains active.

Multiple-disc clutch for tractor PTO shaft

Power shiftable transmission for vehicle

Spring mechanism on a clutch

Growing community of inventors

Meckenbeuren, Germany

Hubert Lehle