EP0480102A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Helifoil pump
Assignee: American Biomed Inc
•
Filing: 1990-10-09
•
Granted: —
•
Expires: 2010-10-09
Abstract
Abstract A temporary circulatory assist pump (14) is disclosed for implantation in the heart (12) of a patient through the femoral artery. The pump (14) is driven by a flexible drive shaft (30) extending through a catheter (16) and being connected to a power source outside the body of the patient. The pump (14) utilizes a helical-shaped foil impeller (38) to pump blood at a rate of approximately three to four liters per minute through the circulatory system of the patient.
Inventors
- 👤 David P. Summers
- 👤 Ned C. Hwang, Ph.D.
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 09:22
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
109 words
A temporary circulatory assist pump, comprising: (a) an elongate, cylindrical housing having at least one intake port and at least one discharge port, said housing being sized for passage through a human blood vessel and insertion into a heart; (b) pump means within said housing for assisting the heart of a patient to pump blood, said pump means including impeller means for pumping blood therethrough; (c) wherein said housing includes discharge means for discharging blood into the vascular system of the patient; (d) extravascular power means connected to said pump means for driving said impeller means; and (e) drive shaft means connecting said pump means to said power means.
Claim 2
Dependent Claim
109 words
A temporary circulatory assist pump, comprising: (a) an elongate, cylindrical housing having at least one intake port and at least one discharge port, said housing being sized for passage through a human blood vessel and insertion into a heart; (b) pump means within said housing for assisting the heart of a patient to pump blood, said pump means including impeller means for pumping blood therethrough; (c) wherein said housing includes discharge means for discharging blood into the vascular system of the patient; (d) extravascular power means connected to said pump means for driving said impeller means; and (e) drive shaft means connecting said pump means to said power means.
Claim 3
Dependent Claim
30 words
The pump of Claim 1 wherein said impeller means comprises a helical-shaped foil impeller positioned within said housing and cooperating with said housing to form a continuous rotating fluid passage.
Claim 4
Dependent Claim
24 words
The pump of Claim 2 wherein said impeller includes an airfoil profile defining a low and high pressure area upon rotation of said impeller.
Claim 5
Dependent Claim
21 words
The pump of Claim 3 including drive shaft stabilizer means for centrally supporting said drive shaft means within said cylindrical housing.
Claim 6
Dependent Claim
33 words
The pump of Claim 1 wherein said cylindrical housing carrying said pump means is mounted to the distal end of a catheter and guided to the heart of a patient by said catheter.
Claim 7
Dependent Claim
23 words
The pump of Claim 3 wherein said helical-shaped foil impeller defines a profile which tapers from a leading end to a trailing end.
Claim 8
Dependent Claim
24 words
The pump of Claim 2 wherein said helical-shaped foil impeller is driven at a rotational speed in the range of 4,000 to 10,000 rpm.
References Cited (Backward Citations)
FR1310620A
Cited
DE2935031A1
Cited
FR2504207A1
Cited
US4753221A
Cited
US4969865A
Cited
US4944722A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.