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:
May. 30, 1989
Filed:
Nov. 20, 1987
Applicant:
Inventor:
Herbert Frisch, Vienna, AT;
Assignee:
Hoerbigee Ventilwerke Aktiengesellschaft, Vienna, AT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B / ; F16K / ;
U.S. Cl.
CPC ...
13762566 ; 13762527 ; 1376255 ; 251333 ;
Abstract
In order to be able to manage with minimum switching force, one of the respective sealing regions on the switching member or valve body of a two-position seat valve is made in the form of a circular sharp edge of small cross-sectional edge radius, thus requiring only a very small force for keeping the valve tight. In particular, in combination with a pressure equalizing construction, this enables very low control energy to undergo maximum amplification.