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:
Dec. 14, 1976
Filed:
Nov. 10, 1975
Charles K Taft, Durham, NH (US);
University of New Hampshire, Durham, NH (US);
Abstract
An electro-fluid interface device utilizes a control member that oscillates within a generally cylindrical chamber between an opposed pair of nozzles located at the ends of the chamber. Each nozzle is in fluid communication with a fluid supply, a fluid outlet, and a fluid drain. A coil or coils energized in response to an electrical input signal pulse width modulate the oscillation of the control member to produce a fluid flow through the outlets that is proportional to the electrical signal. In a preferred form, a pair of the coils is energized to oscillate the control element electromagnetically in cooperation with fluid flow forces on the control member due to the flow through the nozzles. Means for sensing the position of the control element switch the energizing current between the coils.