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:
Apr. 21, 1992
Filed:
Oct. 10, 1990
Applicant:
Inventors:
Edward A Oakley, South Salem, NY (US);
Harry K Crow, Ridgefield, CT (US);
Thomas M Anderson, Forest Lake, MN (US);
Richard T Atherton, Excelsior, MN (US);
Berthold A Fehn, Krefeld, DE;
Assignee:
Schwing America, Inc., White Bear, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417347 ; 417 63 ; 417900 ; 417 53 ; 73239 ;
Abstract
A system for the transport of high solids sludge includes a positive displacement pump for pumping sludge through a pipeline. The volume of sludge transported is accurately measured by determining the fill percentage by using a material flow signal, measured time intervals, hydraulic fluid pressure, or hydraulic fluid flow rate during each pumping cycle.