Servo-valve
AssigneeSiemens Aktiengesellschaft
InventorGeorg Nusche
Life of this patent
Estimating the term…
Abstract
A servo-valve includes a tongue-like piezo-ceramic flexible transducer, which is firmly clamped at one end and can be moved at the other by the application of an electric voltage from a position blocking an air inlet nozzle into one that blocks an air outlet nozzle. To design such a servo-valve in such a way that the effects of distortions of the flexible transducer caused by mechanical and thermal effects can be automatically compensated, one end of the tongue-like flexible transducer is firmly secured to a spindle extending transversely to the flexible transducer. The spindle has a controllable securing device which is released once the voltage is no longer being applied during the return movement of the free end of the flexible transducer towards the air inlet nozzle.
Claims17
A servo-valve composing:
- a) an air inlet nozzle;
- b) an air outlet nozzle;
- c) a resetting spring;
- d) a spindle;
- e) a controllable securing device for securing the spindle;
- f) a tongue-like piezo-ceramic flexible transducer having a first end firmly secured to the spindle which extends transversely to the flexible transducer, and having a second end that is movable by application of an electric voltage from a first position blocking the air inlet nozzle of the servo-valve into a second position that blocks the air outlet nozzle, wherein said resetting spring opposes movement of the transducer from the first position to the second position;
- and
- g) means for releasing the controllable securing device from the spindle when the application of the electric voltage is reduced.
A servo-valve comprising:
- a) an air inlet nozzle;
- b) an air outlet nozzle;
- c) a resetting spring;
- d) a spindle;
- e) a controllable securing device for securing the spindle;
- f) a tongue-like piezo-ceramic flexible transducer having a first end firmly secured to the spindle which extends transversely to the flexible transducer, and having a second end that is movable by application of an electric voltage from a first position blocking the air inlet nozzle of the servo-valve into a second position that blocks the air outlet nozzle, wherein said resetting spring opposes movement of the transducer from the first position to the second position;
- and
- g) means for releasing the controllable securing device from the spindle when the application of the voltage ends.
A servo-valve comprising:
- a) an air inlet nozzle;
- b) an air outlet nozzle;
- c) a resetting spring;
- d) a spindle;
- e) a controllable securing device for securing the spindle;
- f) a tongue-like piezo-ceramic flexible transducer having a first end firmly secured to the spindle which extends transversely to the flexible transducer, and having a second end that is movable by application of an electric voltage from a first position blocking the air inlet nozzle of the servo-valve into a second position that blocks the air outlet nozzle, wherein said resetting spring opposes movement of the transducer from the first position to the second position;
- and
- g) means for releasing the controllable securing device from the spindle when the tongue-like piezo-ceramic flexible transducer leaves the second position.
A servo-valve comprising:
- a) an air inlet nozzle;
- b) an air outlet nozzle;
- c) a resetting spring;
- d) a moveable brake shoe;
- e) a bearing;
- f) a spindle running between the moveable brake shoe and the bearing;
- and
- g) a tongue-like piezo-ceramic flexible transducer having a first end firmly secured to the spindle which extends transversely to the flexible transducer, and having a second end that is movable by application of an electric voltage from a first position blocking the air inlet nozzle of the servo-valve into a second position that blocks the air outlet nozzle, wherein said resetting spring opposes movement of the transducer from the first position to the second position.
Dependencies are inferred from the claim text.