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:
Sep. 23, 1986
Filed:
Dec. 21, 1984
Rainer Burkel, Asperg, DE;
Peter Zieher, Eberdingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A valve assembly for controlling fluid flow between a fluid source and a load has an intake valve having a valve body displaceable between a closed position preventing flow through the intake valve and an open position permitting such flow and an output valve having a valve body displaceable between a closed position preventing flow through the output valve and an open position permitting such flow. Conduits or passages connect the valves in series between the load and the source so that fluid can only flow between the load and source when both of the valves are in their open positions. Respective biasing units urge each of the valves into one of its positions and respective electromagnet-type actuators are electrically energizable to move each valve into the other of its positions. The one position of one of the valves is the closed position and the one position of the other valve is the open position. In addition the two valves are substantially identical. As a result the response times of these two valves will be identical also and will change identically with time or temperature, since substantially the same flow is traversing both valves.