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:
Jan. 23, 1979
Filed:
Apr. 25, 1977
Lothar Petzsch, Bad Kreuznach, DE;
Alfred Rentel, Bad Kreuznach, DE;
Seitz-Werke GmbH, Bad Kreuznach, DE;
Abstract
A control valve for fluid media which includes a housing with a bore having a widened section intermediate its ends into and from which inlet and outlet passages lead for the respective fluid medium to be controlled. A resilient diaphragm or diaphragm with a force to continually urge the diaphragm to assume its normal diametrical shape is provided in the widened section and in its normal, i.e., radially non-expanded condition, defines with the inner wall of the widened section a space establishing intercommunication between the inlet and outlet passages. The diaphragm is provided with a bore extending in the direction of and substantially parallel to the housing bore. Reciprocably mounted in the bore of the housing is a valve pin having a section extending through the diaphragm bore and including a first axially extending portion of a diameter less than the diameter of the diaphragm bore so as to be freely movable into and out of the diaphragm bore, the valve pin also having a second axially extending portion of a diameter greater than the diameter of the first axially extending portion and movable into the diaphragm bore only while increasing the outer diameter of the diaphragm so as to cause the outer periphery of the diaphragm to close off those ends of the passages which lead into the space which in the normal diametrical shape of the diaphragm establishes communication between the passages, the diaphragm sealing the first and second axially extending portions of the valve pin with regard to the inlet and outlet passages.