EP0378251A2
Expired / Lapsed
EP
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Magnetically suspended and rotated impellor pump apparatus
Assignee: Individual
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Filing: 1982-03-17
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Granted: —
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Expires: 2002-03-17
Abstract
Abstract A pump apparatus and method, the pump including a magnetically suspended and rotated impellor (20) inside the pump housing (12). A novel sensor system detects the position of the impellor (12) and thus provides the information for operation of a suspension circuit for magnetically suspending the impellor (12). A valve member (22) may be included as part of the impellor (12) to prevent reverse flow in the event of impellor failure when used as a ventricular assist device.
Inventors
- 👤 Günther Walter Otto Bramm
- 👤 Don B. Dr. Olsen
- 👤 Pavel Novak
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 15:04
CPC Classifications
H; H02; H02K; H02K7/00; H02K7/08; H02K7/09; A; A61; A61M; A61M60/00; A61M60/10; A61M60/122; A61M60/165; A61M60/178; A61M60/20; A61M60/205; A61M60/216; A61M60/226; A61M60/232; A61M60/237; A61M60/242; A61M60/40; A61M60/403; A61M60/422; A61M60/50; A61M60/508; A61M60/538; A61M60/80; A61M60/802; A61M60/804; A61M60/806; A61M60/818; A61M60/82; A61M60/822; A61M60/833; F; F04; F04D; F04D1/00; F04D1/006; F04D13/00; F04D13/02; F04D13/06; F04D13/0606; F04D13/064; F04D29/00; F04D29/04; F04D29/042; F04D29/046; F04D29/048; F04D29/18; F04D29/181; F04D29/183; F04D29/22; F04D5/00; F04D5/001; F16; F16C; F16C32/00; F16C32/04; F16C32/0406; F16C32/044; A61M2205/00; A61M2205/33; A61M2205/3331; A61M2205/3334; A61M2205/82; A61M2205/8237; A61M2205/8243; A61M60/126; A61M60/148; F16C2316/00; F16C2316/10; F16C2316/18; F16C2360/00; F16C2360/44
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
233 words
Blood pump comprising a pump housing (202; 302; 402) an impellor (220; 320; 420) in the housing; magnetic rotation means (232, 233, 234, 235, 260, 262; 332, 334, 360, 362; 432, 434, 460, 462) for magnetically rotating the impellor; magnetic suspension means (236, 237, 238, 239, 264; 336 337, 338, 339, 370, 372; 436, 437, 438, 439, 470, 472) for magnetically suspending the impellor in the housing, including permanent magnet means (264; 370, 372; 470, 472) carried by the impellor and electromagnet means (237, 239; 336, 337, 338, 339; 436, 437, 438, 439) located on the pump housing and cooperating with the permanent magnet means to magnetically suspend the impellor; and sensor means (34, 35; 64, 65; 164, 165;) characterized in that said sensing means are operable to detect the relative position of the impellor (220, 320, 420) inside the pump housing (202; 302; 402) and to generate a signal operable to control the magnetic suspension means as a function of the signal through associated circuit means (114, 115, 116, 117, 118); and that said sensing means cause said associated circuit means (114, 115, 116, 117, 118) to electrically activate said electromagnet means (237, 239; 336, 337, 338, 339; 436, 437, 438, 439) to provide the necessary increase or decrease in repulsive/attractive forces to thereby selectively reorient the suspension of the impellor (220; 320; 420) coaxially within the pump housing (202; 302; 402).
Claim 2
Dependent Claim
233 words
Blood pump comprising a pump housing (202; 302; 402) an impellor (220; 320; 420) in the housing; magnetic rotation means (232, 233, 234, 235, 260, 262; 332, 334, 360, 362; 432, 434, 460, 462) for magnetically rotating the impellor; magnetic suspension means (236, 237, 238, 239, 264; 336 337, 338, 339, 370, 372; 436, 437, 438, 439, 470, 472) for magnetically suspending the impellor in the housing, including permanent magnet means (264; 370, 372; 470, 472) carried by the impellor and electromagnet means (237, 239; 336, 337, 338, 339; 436, 437, 438, 439) located on the pump housing and cooperating with the permanent magnet means to magnetically suspend the impellor; and sensor means (34, 35; 64, 65; 164, 165;) characterized in that said sensing means are operable to detect the relative position of the impellor (220, 320, 420) inside the pump housing (202; 302; 402) and to generate a signal operable to control the magnetic suspension means as a function of the signal through associated circuit means (114, 115, 116, 117, 118); and that said sensing means cause said associated circuit means (114, 115, 116, 117, 118) to electrically activate said electromagnet means (237, 239; 336, 337, 338, 339; 436, 437, 438, 439) to provide the necessary increase or decrease in repulsive/attractive forces to thereby selectively reorient the suspension of the impellor (220; 320; 420) coaxially within the pump housing (202; 302; 402).
Claim 3
Dependent Claim
48 words
Blood pump according to claim 1, characterized in that the said magnetic rotation means comprises a plurality of magnet means (232, 233, 234, 235; 332, 334; 432, 434) arrayed in a aring about the pump housing (202; 302; 402) and operable to rotate said impellor (220; 320; 420).
Claim 4
Dependent Claim
25 words
Blood pump according to claim 1 or 2, characterized in that said magnetic rotation means is an asynchronous motor, especially one using induced eddy currents.
Claim 5
Dependent Claim
22 words
Blood pump according to claim 1, 2 or 3, characterized in that the pump outlet (208) is tangential to the pump housing.
Claim 6
Dependent Claim
29 words
Blood pump according to any of the claims 1-4, characterized in that said impellor (220; 320; 420) comprises a plurality of externally mounted impellor vanes (250, 251, 350, 351).
Claim 7
Dependent Claim
18 words
Blood pump according to any of the claims 1-5, characterized in that the impellor comprises a hollow center.
Claim 8
Dependent Claim
28 words
Blood pump according to claim 6, characterized in that the impellor (220; 320; 420) comprises a plurality of impellor vanes (250, 251, 350, 351) inside the hollow center.
References Cited (Backward Citations)
No citation records indexed.
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