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:
Aug. 14, 1979
Filed:
Apr. 24, 1978
Kurt Nelson, Pleasant Valley, NY (US);
The De Laval Separator Company, Poughkeepsie, NY (US);
Abstract
The sludge outlets of the centrifugal rotor are normally closed by a piston valve which moves axially to open these outlets when operating liquid is drained through openings at the periphery of a closing chamber adjacent the valve, the drain openings being normally closed by a main slide with which the rotor forms an opening chamber. Operating liquid fed to the opening chamber first moves the main slide axially to open the drain openings, thereby effecting opening of the sludge outlets, and then overflows into a third chamber to actuate a second slide and thereby open a drain passage leading from the periphery of the opening chamber into the third chamber, whereby the main slide is returned to its normal position for re-closing the drain openings from the closing chamber.