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:
Nov. 30, 2004
Filed:
Sep. 18, 2002
Andreas Wuethrich, Onex, CH;
Fondarex SA, St. Leigier, CH;
Abstract
The venting valve assembly for casting moulds comprises a venting valve for closing a venting channel. The venting valve comprises a valve housing in which a closure member is received that is movable between an open position and a closed position. The closure member can be frictionally locked in its open position and simultaneously biased in closing direction. For frictionally locking the closure member, a chamber is provided that can be put under a hydraulic overpressure. The chamber has a wall portion that bulges towards the closure member in response to the overpressure. The wall portion is resilient such that it moves back to a position releasing the closure member once the overpressure in the chamber is reduced. For reducing the pressure in the chamber, a release valve is provided which is controlled by a sensor detecting any casting material penetrating into the venting channel. The biasing of the closure member in closing direction is performed pneumatically.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile