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. 07, 1999
Filed:
Jun. 26, 1997
William Tak Tsui, Sale-Cheshire, GB;
Graham Frank Clifford, Stanley, NC (US);
Palmer Investments Limited, , VG;
Abstract
A pump has a bearing stand (3) in which a pump shaft (1) is mounted to be driven by an electric motor. The shaft (1) mounts an impeller (9) having blades (10) which cause fluid entering through an axial inlet nozzle (11) to flow, by rotation of the impeller in one direction, through a centrifugal exit nozzle (12) formed by a suitably located quarter toroid (13a), and a half toroid (14), formed as sheet metal pressings. When the impeller (9) is rotated in the opposite direction, the centrifugal nozzle (12) acts as an entry nozzle and the axial nozzle (11) acts as a discharge nozzle. The pump is particularly suitable for treating textile yarns since said one direction of rotation can be used for out-to-in treatment dye liquor flow where relatively high resistance is encountered and said opposite direction of rotation can be used for in-to-out treatment dye liquor flow where resistance is relatively lower.