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:
Sep. 24, 1991
Filed:
Jan. 11, 1991
Donald Firth, Devon, GB;
Stamet, Inc., Santa Monica, CA (US);
Abstract
A multiple-choke unit for transporting and metering particulate material under ambient conditions wherein the material is compacted to bridging and then disturbed as it is friction driven through a duct. The duct has two opposed walls moving between the inlet and outlet which have a surface area that is larger than the surface area of a stationary wall or walls which form the other part of the duct. The duct includes a plurality of chokes which bridge by compaction and disturb the material as it is friction-driven through the unit. The unit provides simultaneous transport and metering of particulate material. The unit is used to transport particulate material under atmospheric conditions.