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:
Mar. 10, 1998
Filed:
Sep. 06, 1996
Gerald O Walraven, Sturgeon Bay, WI (US);
Other;
Abstract
An improved dump valve construction for a high density cellulosic pulp cleaner. The cleaner comprises an upper separating chamber and a lower reject chamber which communicates with the lower end of the separating chamber. Cellulosic pulp is pumped tangentially into the upper end of the separation chamber and is swirled within the separation chamber to cause the high density contaminants to fall into the reject chamber while the pulp is discharged through an outlet in the upper end of the separation chamber. The opening between the lower end of the separation chamber and the reject chamber can be opened and closed by a sliding upper valve while the lower end of the reject chamber is formed with an outlet and the flow through the outlet is controlled by a dump valve having a curved or spherical outer surface which seats on an annular valve seat bordering the outlet. The dump valve is moved between a closed and opened position by a fluid cylinder unit and the piston rod of the fluid cylinder unit is connected to the stem of the dump valve through a lost-motion connection.