US4964864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heart assist pump
Assignee: AHN SAMUEL S
•
Filing: 1988-09-27
•
Granted: 1990-10-23
•
Expires: 2008-09-27
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 the moineau pumping principal 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
- 👤 Jeddy D. Nixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:53
CPC Classifications
F; F04; F04C; F04C13/00; F04C13/001; A; A61; A61M; A61M60/00; A61M60/10; A61M60/122; A61M60/126; A61M60/13; A61M60/20; A61M60/205; A61M60/216; A61M60/237; A61M60/247; A61M60/253; A61M60/40; A61M60/403; A61M60/408; A61M60/411; A61M60/414; A61M60/424; A61M60/438; A61M60/441; A61M60/80; A61M60/835; A61M60/148; F04C2/00; F04C2/08; F04C2/10; F04C2/107; F04C2/1071
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
166 words
A temporary circulatory assist pump, comprising: (a) an elongate, cylindrical biocompatible pump having at least one intake port and at least one discharge port, said pump being sized for passage through a human blood vessel and insertion in to a heart; (b) said pump comprising a stator and a rotor whereby orbiting motion of the rotor moves a seal continuously through the stator for pumping of blood therethrough; (c) wherein said stator and rotor define an axial cavity divided to form separate rotor cavities having separate outlet ports for discharging blood into a discharge duct in fluid communication with said separate rotor cavities; (d) extravascular power means connected to said pump for driving said rotor; and (e) drive shaft means connecting said pump means to said power means, said drive shaft means being connected to said rotor by a flexible joint, said flexible joint permitting flexure deformation thereby enabling said rotor to move through an orbital path upon rotation of said rotor by said power means.
Claim 2
Dependent Claim
166 words
A temporary circulatory assist pump, comprising: (a) an elongate, cylindrical biocompatible pump having at least one intake port and at least one discharge port, said pump being sized for passage through a human blood vessel and insertion in to a heart; (b) said pump comprising a stator and a rotor whereby orbiting motion of the rotor moves a seal continuously through the stator for pumping of blood therethrough; (c) wherein said stator and rotor define an axial cavity divided to form separate rotor cavities having separate outlet ports for discharging blood into a discharge duct in fluid communication with said separate rotor cavities; (d) extravascular power means connected to said pump for driving said rotor; and (e) drive shaft means connecting said pump means to said power means, said drive shaft means being connected to said rotor by a flexible joint, said flexible joint permitting flexure deformation thereby enabling said rotor to move through an orbital path upon rotation of said rotor by said power means.
Claim 3
Dependent Claim
31 words
The pump of claim 1 including a discharge nozzle supported within said housing in line with said stator, said discharge nozzle including a restriction for pressurizing and jetting blood pumped therethrough.
Claim 4
Dependent Claim
47 words
The pump of claim 1 wherein said pump means comprises a stator fabricated of resilient material and a helical shaped stainless steel rotor rotatable within said stator, said stator and said rotor cooperating to form a moving seal continuously through said stator upon rotation of said rotor.
Claim 5
Dependent Claim
27 words
The pump of claim 1 wherein said pump includes at least two separate intake ports in fluid communication with said separate rotor cavities formed in said pump.
Claim 6
Dependent Claim
24 words
The pump of claim 4 wherein said separate rotor cavities are separated by at least one shaft stabilizer supporting said rotor within said stator.
References Cited (Backward Citations)
US3505987A
Cited
US3667069A
Cited
US4051840A
Cited
US4102610A
Cited
US4173796A
Cited
US4382199A
Cited
US4625712A
Cited
GB2184785A
Cited
US4817586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |