Motors: expansible chamber type – Working member position responsive motive fluid control – Exhaust control
Patent
1989-05-05
1991-12-24
Look, Edward K.
Motors: expansible chamber type
Working member position responsive motive fluid control
Exhaust control
91436, 91443, 91437, 91399, F15B 1522
Patent
active
050741926
ABSTRACT:
Device and procedure for the supply, with recovery of the raising energy, of press actuators having a cylinder within which a piston delimits two chambers, namely an upper and a lower chamber, which are supplied with pneumatic power, the said device having a pneumatic control unit connected to the mains and including at least one supply line to the upper chamber of the actuator and one supply line to the lower chamber of the actuator, these lines having supply and discharge valves, in which device the supply lines to the chambers of the actuator pass through an economizer unit interposed between the control unit and the actuator and including a servocontrolled valve which intercepts the supply line to the upper chamber, a servocontrolled valve which intercepts the supply line to the lower chamber, and a connecting pipe between the supply line of the lower chamber and that of the upper chamber, downstream of the said intercepting valves, and provided with its own servocontrolled intercepting valve, while means of detecting the position of the actuator piston are provided, are functionally connected to the servocontrolled valves, and can cause the opening and closing of these valves in successive phases of the movement of the piston.
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Dubno Herbert
Kateshou Yuri
Look Edward K.
Pomini Farrel S.p.A.
Ryznic John
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