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:
Feb. 05, 1991
Filed:
Dec. 21, 1989
Juhani Polon, Helsinki, FI;
Neles Oy, Helsinki, FI;
Abstract
A regulation valve and a method for changing the characteristic flow curve and/or the maximum capacity of a regulation valve. The valve consists of a housing provided with a flow duct, a closing member, which is fitted inside the housing in the flow duct and shaped as a body of rotation or as a part of a body of rotation, and a turning shaft which extends from the closing member to outside the housing to facilitate relating the closing member. The shape of the forward edge of the closing face of the closing member differs from the shape of the rearward edge. The characteristic flow curve of the valve is affected by the shape of the edge of the closing face of the closing member at whose side the flow opening starts being formed when the valve is rotated from the closed position to the opened position. To change the characteristic flow and/or the maximum capacity, one of the two directions of rotation is chosen to be the direction of opening of the valve.