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:
Dec. 12, 1978
Filed:
Aug. 17, 1977
David B Todd, Saginaw, MI (US);
Baker Perkins Inc., Saginaw, MI (US);
Abstract
A bowl type centrifuge for separating solids and liquids from mixtures in which the rotary differential speed between the centrifuge bowl and an internal conveying scroll is established by variably augmenting the frictional torque imparted to the bowl by the mixture driven in rotation by the scroll. The scroll is directly driven in rotation by a drive motor. The mixture to be separated is in turn driven in rotation by the rotating scroll and the frictional drag between the rotating mixture and the inner surface of the bowl induces rotation of the bowl. The speed of rotation of the bowl thus induced is less than that of the scroll, thus creating a rotary speed differential which enables the scroll to convey solid particles of the mixture axially toward one end of the bowl. The magnitude of this rotary speed differential is adjusted by a variable torque drive coupling between the scroll and bowl which may take the form of a variable speed fluid drive or an eddy current coupling to variably augment the torque transmitted to the bowl by the rotating mixture.