Motors: expansible chamber type – Working member position feedback to motive fluid control – Electrical input and feedback signal means
Patent
1999-01-06
2000-07-11
Nguyen, Hoang
Motors: expansible chamber type
Working member position feedback to motive fluid control
Electrical input and feedback signal means
91459, F15B 1316
Patent
active
060856327
ABSTRACT:
An apparatus for the damped positioning of a piston running in a cylinder at one fixed abutment at least and more particularly for setting in a terminal position. The apparatus includes sensor means connected with an electronic regulating means for detecting the piston position as an actual value signal. A valve means adapted to be regulated by the regulating means serves for regulated braking of the piston prior to reaching the respective desired position by influencing opposing pressure in the cylinder outlet side. For forming the setting quantity for the proportional valve a position regulating means is provided which is modified by a value dependent on the respective speed and/or acceleration of the piston. This apparatus ensures an extremely accurate regulation of position simply by detecting of the position of the piston as an actual value signal. It is more particularly possible to brake the piston in the terminal positions with a damping action that an additional damping system is no longer necessary.
REFERENCES:
patent: 4951549 (1990-08-01), Olsen et al.
patent: 5012722 (1991-05-01), McCormick
patent: 5491422 (1996-02-01), Bitar et al.
patent: 5617723 (1997-04-01), Hosseini et al.
Backe, W., Servohydraulik Aug. 5, 1986, pp. 183, 228, 251-254.
Arbter Jurgen
Gommel Gerhard
Schwenzer Reinhard
Stoll Kurt
Festo AG & Co.
Nguyen Hoang
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