Device for moving and positioning an element of a machine

Details Device for moving and positioning an element of a machine Device for moving and positioning an element of a machine

1974-11-26

1977-07-19

Maslousky, Paul E.

Motors: expansible chamber type

Moving cylinder

Cylinder and piston have relative reciprocation on fixed axis

91386, 91461, F01B 1500, F15B 1316

Patent

active

040361098

ABSTRACT:
Device for moving and positioning an element of a machine comprising a hydraulically controlled valve shaft sliding in a sleeve and two output ducts in which the oil pressure depends on the position of the valve shaft. The oil pressure in the two output ducts is supplied respectively to two compartments of a hydraulic jack which positions and moves the carriage or slide of a machine tool. Two control chambers in between the valve shaft and sleeve jack include a constant volume part formed between shoulders on the valve shaft and a variable volume part formed by a slidable piston inside of a longitudinally extending cylindrical cavity inside the valve shaft. The cylindrical cavities extend to respective outer ends of said valve piston with fixed stops attached to the sleeve ends. The valve shaft is mechanically coupled to the mobile unit with the jack by a spring biased lost-motion pivot lever connection.

REFERENCES:
patent: 2536965 (1951-01-01), Taylor
patent: 2841168 (1958-07-01), Levetus et al.
patent: 2933105 (1960-04-01), Jerman
patent: 3184939 (1965-05-01), Eitel
patent: 3199410 (1965-08-01), Hereth
patent: 3745883 (1973-07-01), Ward

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