Piezo valve
AssigneeFesto AG & Co.
InventorsHerbert Frisch, Hannes Wirtl, Michael Weinmann, Martin Maichl
Life of this patent
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Abstract
A piezo valve having a flexural transducer unit which includes two flexural transducers adapted to be deflected in opposite directions. The flexural transducers are fixedly joined together at one terminal part of the flexural transducer unit with the formation of a common bearing section. The flexural transducer unit is pivotally mounted in relation to the housing. At least one flexural transducer serves for the control of a valve opening associated with it, the other flexural transducer being able to be biased by the application of a drive voltage toward a support face arranged in a deflection path in order to for instance to increase the displacement path of the other flexural transducer.
Claims24
A piezo valve comprising, a flexural transducer unit arranged in a valve housing and having at least two flexural transducers able to be driven by the application of drive voltages to produce opposite deflection movements, said two flexural transducers being arranged alongside each other with mutually parallel planes of deflection, and being fixedly joined together in a terminal region of the flexural transducer unit with the formation of a common bearing section, at which the flexural transducer unit is pivotally mounted for pivoting in relation to the valve housing around a axis of rotation extending athwart the deflection planes, at least one of said flexural transducers being a control flexural transducer serving for the control of at least one associated valve opening, while the other flexural transducer is constituting a support flexural transducer which is suitable for increasing the displacement and the force of the control flexural transducer and which may be biased against a support face arranged in its displacement path by the application of the drive voltage.
Dependencies are inferred from the claim text.