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. 03, 1991
Filed:
Sep. 14, 1989
Thomas W Schmidt, Ochelata, OK (US);
Phillips Petroleum Company, Bartlesville, OK (US);
Abstract
A method and apparatus for continuously feeding particulate solid material into a pressurized system without pressure loss. The invention includes a rotary feeder for transferring particulate material to a high pressure system. In the feeder, chambers are filled with particulate material, and a rotor turns to empty the particulate material into the high pressure system. A compression cylinder is provided which has an inlet in communication with a high pressure chamber substantially empty of particulate material. The gas emptied from this chamber is forced by a piston in the compression cylinder into another chamber which is intially filled with particulate material at substantially atmospheric pressure. As the chamber which has been emptied of gas is brought into communication with the inlet of the feeder, any gas loss is substantially negligible because the gas is at approximately the same pressure as the inlet. The actuation of the piston and the inlet and outlet valves are controlled in response to the rotation of the rotor within the feeder.