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. 04, 2001
Filed:
Feb. 28, 2000
Applicant:
Inventors:
Assignee:
Siemens Aktiengesellschaft AG, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02M 5/946 ; F16K 3/110 ;
U.S. Cl.
CPC ...
F02M 5/946 ; F16K 3/110 ;
Abstract
A control valve contains a housing with an inlet connection, an outlet connection and a return connection. A first seat valve with a first valve body and a second seat valve with a second valve body are disposed in the housing. The first seat valve is disposed between the outlet connection and the return connection and is normally closed and the second seat valve is disposed between the inlet connection and the outlet connection and is normally open. The second valve body is disposed coaxially in the first valve body.