Turning – Process of turning
Patent
1979-07-06
1981-03-03
Vlachos, Leonidas
Turning
Process of turning
82 24R, 91 35, B23B 546, F15B 2102
Patent
active
042533589
ABSTRACT:
An electrohydraulic follow-up amplifier comprises a hydraulically operated prime mover constituted by a cylinder and a piston axially movable therein and fixedly connected to a connecting member. The arrangement includes further an electronically controlled motor, for instance a direct current servomotor driving for instance a nut meshing with the threaded spindle carrying a control member cooperating with valves for control flow of pressure fluid into and out from cylinder chambers to opposite sides of said piston of said prime mover. The spindle is connected to the connecting member over a coupling comprising a cylinder fixed to the connecting member and a piston fixed to the spindle. The piston of the coupling is movable between two abutments, one of which is adjustable by feeding pressure fluid into cylinder chambers to opposite sides of said piston of the coupling and flow of such pressure fluid is controlled by an additional valve which in turn in controlled from a cam disk which is turned in dependence on the movement of the connecting member.
REFERENCES:
patent: 3677115 (1972-07-01), Skrentner
patent: 3726184 (1973-04-01), Saito
patent: 3797364 (1974-03-01), Schulze
patent: 3921479 (1975-11-01), Katz
patent: 3993565 (1976-11-01), Holthuis
patent: 4036086 (1977-07-01), Thumm et al.
Hartmann & Lammle GmbH & Co.
Striker Michael J.
Vlachos Leonidas
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