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:
May. 09, 1989
Filed:
Jun. 08, 1988
Charles Raufast, Saint Julien les Martigues, FR;
BP Chemicals Limited, London, GB;
Abstract
The present invention relates to a rotary-type metering device making it possible to dispense granular substances consisting of fine particles which are difficult to handle. The metering device consists of a spherical core rotating around a horizontal axis inside a casing comprising a feed orifice and an outlet orifice. The spherical core comprises at least one cavity having an opening at the surface of the core, and sides and bottom within the core. This cavity has the shape of a volume consisting of two volumes of revolution, contiguous and coaxial, V.sub.1 and V.sub.2, with an axis perpendicular to the axis of rotation of the spherical core. The volume V.sub.1 is a truncated cone of revolution or a cylinder of revolution.