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:
Jan. 01, 1991
Filed:
Jun. 02, 1989
Niels D Jensen, Bjerringbro, DK;
Poul E Mikkelstrup, Bjerringbro, DK;
Grundfos International A/S, Bierringbro, DK;
Abstract
An immersion pump assembly comprises a wet-rotor motor of which the rotational speed and/or the torque can be varied by means of a frequency changer, and a pump unit. The frequency changer, the wet-rotor motor and the pump unit are arranged one above another within a tubular jacket. The motor comprises a split tube formed as a closed pot which is connected to the jacket and which separates the stator compartment from the pump unit in liquid-tight and pressure-tight fashion. The frequency changer is so installed in the stator compartment that its operating electronic system is disposed on the bottom of the split tube pot in the stator compartment.