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:
Nov. 10, 1987
Filed:
May. 13, 1986
Curtis L Coffee, Indianapolis, IN (US);
Other;
Abstract
A linear, closed-loop current-to-pressure transducer operating with a two-way solenoid valve. Outlet fluid pressure feedback is provided by an integral-circuit pressure sensor having a direct, sealed connection to a manifold to which the solenoid valve is also directly connected, the pressure sensor being electrically connected to the feedback input of a servo amplifier which has a reference input connected to an analog control signal input through an input scaling circuit capable of adjusting both span and offset. The input scaling circuit, servo amplifier, pressure sensor, and manifold, which includes a feedback line from the solenoid valve to the pressure sensor, are mounted on a printed-circuit board.