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:
Jun. 05, 2001
Filed:
Jan. 11, 2000
ABB Alstom Power (Schweiz) AG, Baden, CH;
Abstract
The invention relates to a plate valve (,) as used for the actuator of a control valve. It comprises an inlet (,) with a sealing seat (,) around which the openings of the outlet (,) are arranged, and it has two plates (,), (,), between which there is an interspace (,). Both plates (,), (,) are attached to the housing (,) by springs (,) in a spring space (,). The spring space (,) is operatively connected to a proportional valve by an opening (,) and a line (,). If the pressure in the spring space (,) is lowered by the proportional valve, the additional plate (,) first of all drops as a result and thereby exposes the outflow openings (,) in the large plate (,). There is a slight flow of the oil from the inlet (,) through the orifice plates (,) situated in the plate (,) and through the outflow openings (,) to the openings of the outlet (,). In a second stage, the plate (,) then drops and thereby exposes the openings of the outlet (,). The plate valve (,) is open and the oil can flow unhindered from the inlet (,) to the outlet (,). The plate valve (,) is suitable for an actuator, the control valve of which is to have a short closing time since it has good dynamic characteristics by virtue of its configuration with two plates (,), (,).