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. 17, 1993
Filed:
Apr. 15, 1992
James R Prough, Glens Falls, NY (US);
Kamyr, Inc., Glens Falls, NY (US);
Abstract
A high pressure transfer device for feeding wood chips to a digster in the production of paper pulp has enhanced efficiency. A pocketed rotor is mounted for rotation in a housing having first through fourth ports, with a screen at the third port for screening wood chips out of liquid passing through that third port. This screen is blanked at the leading edge in the direction of rotation so that as a pocket rotates into operative association with the first and third ports, the pocket inlet has an arcuate extent of about two inches which is exposed to the first port --large enough to allow chips to start flowing freely into the pocket--before the outlet of that pocket is exposed to a suction source in communication with the screen. A pump supplies high pressure liquid to the second port, but the second and fourth ports are constructed so that a pocket inlet--as the rotor rotates into operative association with the second and fourth ports--is not operatively exposed to the high pressure liquid from the pump until that pocket outlet is already in communiction with the fourth port over an arcuate extent of about two to three inches, allowing chips in the pocket to escape rather than be compressed by the high pressure flow.