Work holders – Holder mounted for movement – Including means to shift holder position
Patent
1985-11-22
1987-04-07
Watson, Robert C.
Work holders
Holder mounted for movement
Including means to shift holder position
74409, 74425, A47G 2704
Patent
active
046554416
ABSTRACT:
The invention relates to a device for the transverse and/or longitudinal machining of wood workpieces having at least one clamping table which is rotatable or tiltable about at least one pivot axis. The clamping table is connected to a drive gear of a servo drive positioned in the pivot axis. So that the servo drive of the device can also operate free from play during a machining operation, an output gear wheel having front and rear tooth flanks and connected to a servo motor via a drive gear and a sprocket wheel are secured on an output shaft. The sprocket wheel is in engagement with a tension chain which exerts a torque on the output shaft in a predetermined rotational direction, one free end of the tension chain being connected to a controllable fluid cylinder so that in any rotational direction of the servo motor or of the output shaft, either front or rear tooth flanks of the output gear wheel are constantly in contact with corresponding flanks of the drive gear.
REFERENCES:
patent: 1907518 (1933-05-01), Dierkens et al.
patent: 2318791 (1943-05-01), Mueller
patent: 2693717 (1954-11-01), Schick
patent: 3762234 (1973-10-01), Hoglund
patent: 4542814 (1985-09-01), Ledeen et al.
patent: 4558861 (1985-12-01), Gall
MZW-Maschinenfabrik Zuckermann Gesellschaft m.b.H.
Watson Robert C.
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