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:
Mar. 28, 1989
Filed:
Jan. 17, 1985
Ulrich Faeser, Kronberg, DE;
Fresenius A.G., Bad Homburg, DE;
Abstract
In an apparatus whose output power is monitored and controlled to avoid safety-endangering effects, such as medical equipment, a monitored control arrangement is provided which includes (1) a control circuit for controlling output power at a desired level as part of the test wherein the control circuit consists of circuit elements with known failure rates, (2) a monitoring circuit connected to the control circuit to monitor output power and, if output power exceeds a critical level, to disconnect the control circuit to limit the output power (the monitoring circuit should also include circuit elements having known failure behavior) and (3) a test circuit electrically connected to the monitoring circuit and to the control circuit whose function is to disable the control circuit and to control the output power while performing an initial test on the monitoring circuit, and also to enable the control circuit and release control over the output power after performing the initial test, the test circuit including a microcomputer.