US4969865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helifoil pump
Assignee: American Biomed Inc
•
Filing: 1989-01-09
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Granted: 1990-11-13
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Expires: 2009-01-09
Abstract
Abstract A temporary circulatory assist pump is disclosed for implantation in the heart of a patient through the femoral artery. The pump is driven by a flexible drive shaft extending through a catheter and being connected to a power source outside the body of the patient. The pump utilizes a helical-shaped foil impeller to pump blood at a rate of approximately three to four liters per minute through the circulatory system of the patient.
Inventors
- 👤 Ned H. C. Hwang
- 👤 David P. Summers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:40
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/04; F04D29/043; A; A61; A61M; A61M60/00; A61M60/10; A61M60/122; A61M60/126; A61M60/13; A61M60/20; A61M60/205; A61M60/216; A61M60/237; A61M60/40; A61M60/403; A61M60/408; A61M60/411; A61M60/414; A61M60/80; A61M60/802; A61M60/804; A61M60/806; A61M60/808; A61M60/855; A61M60/865; F04D29/18; F04D29/181; F04D3/00; A61M60/148; Y; Y10; Y10S; Y10S415/00; Y10S415/90
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
110 words
A temporary circulatory assist pump, comprising: (a) an elongate, cylindrical housing means having at least one intake port and at least one discharge port, said housing means for passage through a human blood vessel and insertion into a heart; (b) a single helically-shaped foil impeller having a leading edge, a trailing edge and an axis extending therebetween, said impeller being co-axially positioned within said housing means and cooperating with said housing means to form a pump for assisting the heart of a patient to pump blood; (c) extravascular power means connected to said pump for driving said impeller; and (d) drive shaft means connecting said pump to said power means.
Claim 2
Dependent Claim
110 words
A temporary circulatory assist pump, comprising: (a) an elongate, cylindrical housing means having at least one intake port and at least one discharge port, said housing means for passage through a human blood vessel and insertion into a heart; (b) a single helically-shaped foil impeller having a leading edge, a trailing edge and an axis extending therebetween, said impeller being co-axially positioned within said housing means and cooperating with said housing means to form a pump for assisting the heart of a patient to pump blood; (c) extravascular power means connected to said pump for driving said impeller; and (d) drive shaft means connecting said pump to said power means.
Claim 3
Dependent Claim
35 words
The pump of claim 1 wherein said impeller defines an airfoil profile, wherein, upon rotation of said impeller high and low pressure forces are produced within said housing means for pumping blood through said pump.
Claim 4
Dependent Claim
30 words
The pump of claim 2 wherein said impeller defines a continuous contour from the leading edge to said trailing end forming a continuous rotating fluid passage within said housing means.
Claim 5
Dependent Claim
28 words
The pump of claim 3 wherein said helical-shaped foil impeller is driven by said power means at a rotational speed in the range of 4,000 to 10,000 rpm.
Claim 6
Dependent Claim
22 words
The pump of claim 2 including drive shaft stabilizer means for centrally supporting said drive shaft means within said cylindrical housing means.
Claim 7
Dependent Claim
23 words
The pump of claim 2 wherein said helically-shaped foil impeller defines a profile which tapers from said leading end to said trailing end.
Claim 8
Dependent Claim
18 words
The pump of claim 1 including catheter means for guiding said pump to the heart of a patient.
References Cited (Backward Citations)
US3505987A
Cited
US3487784A
Cited
US3667069A
Cited
US3995617A
Cited
US4051840A
Cited
US4102610A
Cited
US4173796A
Cited
US4275988A
Cited
US4382199A
Cited
US4688998A
Cited
US4625712A
Cited
GB2184785A
Cited
US4817886A
Cited
US4753221A
Cited
US4861330A
Cited
US4779614A
Cited
US4817586A
Cited
US4846152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |