The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 28, 1986
Filed:
Jan. 11, 1984
Herbert Frisch, Vienna, AT;
ENFO Grundlagenforschungs AG, Dottingen, CH;
Abstract
An electro-pneumatic signal converter, having a piezo-electric bending element (1) which bends when an electrical voltage is applied and controls a pneumatic signal transmitter. The piezo-electric bending element (1) is securely clamped in a sealed transmitter casing (4) and controls an air inlet seating (7) and an air outlet seating (8) which are inserted opposite one another in the transmitter casing (4). In the absence of electrical voltage the piezo-electric bending element (1) bears against the air inlet seating (7), against which it is pretensioned. When a voltage is applied, it separates from the air inlet seating (7) and closes the air outlet seating (8). The respective pneumatic signal is taken off on a signal output (10) which is led out of the sealed space (9) of the transmitter casing.