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. 15, 1992
Filed:
Apr. 08, 1992
Mannesmann Rexroth GmbH, , DE;
Abstract
Amplifier units for controlling valves, in particular proportional solenoid valves, comprise a number of components such as an end stage, a power supply, a control electronics and possibly a closed loop control including signal inputs for desired and actual values. The control electronics generates a desired positioning characteristic for each type of valve. According to the invention, the control electronics is replaced by a programmable component including a read-only-memory in which the amplifier is associated to a particular type of valve by loading the read-only-memory with valve specific data which specify a particular type of valve. The invention allows to manufacture and to stock non-programmed amplifiers of identical structure. To make an amplifier unit ready for use a particular program is loaded to suit the amplifier to the valve type.