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. 21, 2004
Filed:
May. 22, 2003
Thorsten Siess, Wuerselen, DE;
Gebhard Doepper, Wolpertshausen, DE;
Impella CardioSystems AG, , DE;
Abstract
The micromotor serves to drive an impeller ( ) rotating in a pump housing ( ). The excitation winding of the micromotor is surrounded by an enveloping flux return structure ( ) of ferromagnetic material divided into rings ( ). The rings ( ) are separated from each other by slots ( ). The slots are produced by laser cutting of a continuous tube. The enveloping flux return structure has a small wall thickness of a few tenths of a millimeter. The rings ( ) are mutually connected by bridges ( ). The enveloping flux return structure ( ) can be integrally formed with the pump housing ( ) of the pump ( ). The micromotor can be produced in a small format with a small diameter. It has a high flow rate at a correspondingly high rotational speed. The micromotor is particularly suitable for introducing blood pumps into the vascular system in a non-operative minimally invasive percutaneous manner.