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. 06, 2004
Filed:
Nov. 21, 2001
Metal Industries Research & Development Centre, Kaohsiung, TW;
Abstract
A ball valve having a magnetic seat sealing device comprises a valve body, a valve seat, a valve ball, a valve stem and a valve bonnet, wherein the valve seat is disposed within a valve body cavity of the valve body, the valve ball being rotatably disposed on the valve seat, the valve bonnet engaging the valve body to confine the valve body cavity, the valve stem passing through the valve bonnet and drivingly engaging the valve ball; and being characterized by comprising a magnetic seat sealing device that employs a magnetic mechanism to control the metal valve seat, so that when the ball valve is in a closed condition, the magnetic mechanism exerts a magnetic force to the metal valve seat to further tighten and seal the valve seat against the valve ball; and when the ball valve is in an open condition, the magnetic force is released to allow the metal valve seat to return its original position; whereby the metal ball valve can be operated by a low operative torque and maintaining superior sealing effect.