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. 13, 1988
Filed:
Oct. 06, 1986
Applicant:
Inventors:
Oscar Luthi, Nashua, NH (US);
Donald B Johnson, Litchfield, NH (US);
Assignee:
Ingersoll-Rand Company, Woodcliff Lake, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D / ; F04D / ;
U.S. Cl.
CPC ...
415 62 ; 415 68 ; 4151 / ; 415143 ; 415168 ; 416188 ;
Abstract
A pulp feeder feeds the pulp from the pulp feeder housing to the pump impeller. The impeller is provided with vanes specially constructed to provide channels of sufficient dimension to permit the flow of the pulp through the channels. The impeller also has helical flights for feeding the pulp to the channels. The end of the pulp feeder is spaced close enough to the impeller to feed the pulp to the impeller flights but far enough away from the impeller to not interfere with the removal of air. An air removal pipe may also be included in the pulp feeder housing.