Title:
無シール血液ポンプ
Document Type and Number:
Japanese Patent JP4248626
Kind Code:
B2
Abstract:
An implantable rotary sealless blood pump (11) is provided. The pump (11) includes a housing (12) having an inlet tube (13) on one end and an impeller casing (14) on the other end. A rotor (17) is mounted for rotation within the housing (12), with the rotor (17) having an elongated shaft portion (18) and an impeller (19) attached to the shaft portion (18). The impeller (19) is located within the impeller casing (14). Radial magnetic bearings (28,29) are carried by the shaft portion (18) and radial magnetic bearings (23,24) are carried by the housing (12) for maintaining the shaft portion (18) of the rotor (17) within the inlet tube (13) of the housing (12). A rotor motor (53) includes a plurality of permanent magnets (54) carried by the impeller (19) and a motor stator (56) including an electrically conductive coil (57) located within the housing (12). A ring of back iron (58) is carried by the impeller casing (14) to aid in completing a flux return path for the permanent magnets (54). A plurality of hydrodynamic thrust bearings are located outside of the axis of rotation of the rotor (17). The impeller (19) uses large axially thick blade sectors (49) with narrow blood channels (51) extending through the impeller (19), to minimize hemolysis and to increase the working surface of the blades (49).
Inventors:
Richard Kay Wampler
Application Number:
JP20598598A
Publication Date:
April 02, 2009
Filing Date:
July 22, 1998
Export Citation:
Assignee:
Heartware Incorporated
International Classes:
A61M1/10; F04D13/06; F04D29/046; F04D29/048; F04D29/08; F16C39/06; H02K5/128; H02K7/09; H02K7/14; H02K41/03
Domestic Patent References:
| JP7184992A | ||||
| JP6312457A | ||||
| JP6078995A | ||||
| JP7509156A | ||||
| JP4506163A | ||||
| JP5208047A |
Foreign References:
| US4072370 | ||||
| US5211546 | ||||
| US4507048 |
Attorney, Agent or Firm:
Shinjiro Ono
Kazuo Shamoto
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Toru Miyamae
Kazuo Shamoto
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Toru Miyamae