US5980448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single chamber blood pump
Assignee: Vascor Inc
•
Filing: 1998-01-28
•
Granted: 1999-11-09
•
Expires: 2018-01-28
Abstract
Abstract A blood pump apparatus can include a pump housing having a drive chamber containing a drive mechanism. A cupped member can be connected to the housing and the drive mechanism can include a motor for rotating an eccentric shaft. A pumping arm can be provided having one end riding on the eccentric shaft, an intermediate portion pivotably attached to the housing and another end connected to a movable plate. A roller bearing can be mounted on the eccentric shaft on which the arm can ride. A compressible blood chamber having an inlet and an outlet connected can be provided sandwiched between the cupped portion and the movable plate. The motor thus rotates the cam causing the pumping arm to pivot which cycles the movable plate against the blood chamber to pump blood. The movable plate can be implanted adjacent a lung such that the lung moves with the plate as blood is pumped and thereby functions as a compliance chamber. A speed reducer can be provided between the motor and the eccentric shaft. A hermetically sealing bellows can be provided to seal the drive chamber and the end of the pumping arm from body fluids. An enclosure bag can be provided surrounding all or a portion of the blood pump to provide a tissue friendly surface and to prevent tissue from becoming caught in the moving parts of the blood pump. A position sensor can be included for determining a volume of blood in the chamber for use by an electronic controller to control the speed of the motor to optimize pumping action.
Inventors
- 👤 Marlin Stephen Heilman
- 👤 Christopher David Capone
- 👤 Edward Karl Prem
- 👤 Richard Andrew Zehel Sofranko
- 👤 Carl Michael Parisi
- 👤 Steve Andrew Kolenik
- 👤 Daniel Richard Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:09
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61F2/064; A61M; A61M60/00; A61M60/10; A61M60/122; A61M60/165; A61M60/178; A61M60/40; A61M60/424; A61M60/438; A61M60/441; A61M60/80; A61M60/855; A61M60/857; A61M60/871; A61M60/873; A61M60/876; A61B; A61B17/00; A61B17/11; A61B2017/1135; A61F2/24; A61M2205/00; A61M2205/82; A61M2205/8237; A61M2205/8243; A61M60/126; A61M60/148
Claims Analysis
Total Claims: 66
Claim 1
Independent Claim
184 words
A blood pump apparatus implantable in a patient adjacent said patient's lung for supplying blood to the patient's circulatory system, the blood pump apparatus comprising: a. a pump housing having a drive chamber b. a base connected to the pump housing; c. a compressible blood chamber having a first side adjacent the base, the blood chamber having an inlet and an outlet each connectable to the circulatory system; d. a movable portion exterior to the base and housing and adjacent a second side of the blood chamber opposite said first side, said movable portion positionable adjacent a portion of said lung such that as the blood is pumped portions of volumetric changes in the compressible blood chamber are compensated for during movement of said movable portion; e. an arm having a first end pivotably connected to the movable portion; and f. a drive mechanism housed in the drive chamber and connected to a second end of the arm, wherein the drive mechanism operates the arm to compress the blood chamber between the movable portion and the base to pump blood through the circulatory system.
Claim 2
Dependent Claim
184 words
A blood pump apparatus implantable in a patient adjacent said patient's lung for supplying blood to the patient's circulatory system, the blood pump apparatus comprising: a. a pump housing having a drive chamber b. a base connected to the pump housing; c. a compressible blood chamber having a first side adjacent the base, the blood chamber having an inlet and an outlet each connectable to the circulatory system; d. a movable portion exterior to the base and housing and adjacent a second side of the blood chamber opposite said first side, said movable portion positionable adjacent a portion of said lung such that as the blood is pumped portions of volumetric changes in the compressible blood chamber are compensated for during movement of said movable portion; e. an arm having a first end pivotably connected to the movable portion; and f. a drive mechanism housed in the drive chamber and connected to a second end of the arm, wherein the drive mechanism operates the arm to compress the blood chamber between the movable portion and the base to pump blood through the circulatory system.
Claim 3
Dependent Claim
92 words
The blood pump of claim 1 wherein the drive mechanism further comprises: a. an eccentric shaft having an input end and an output end; b. the arm having a second end movable by the output end of the eccentric shaft; and c. a motor housed in the drive chamber, the motor having an output shaft connected to the input end of the eccentric shaft for rotating the eccentric shaft thereby causing the arm to operate the movable portion to compress and release the blood chamber to pump blood through the circulatory system.
Claim 4
Dependent Claim
27 words
The blood pump of claim 2 further comprising a speed reducer connected intermediate the output shaft of the motor and the input end of the eccentric shaft.
Claim 5
Dependent Claim
24 words
The blood pump of claim 2 wherein the arm is mounted in a plane orthogonal to an axis of rotation of the eccentric shaft.
Claim 6
Dependent Claim
46 words
The blood pump of claim 1 further comprising a position sensor disposed in the drive chamber for detecting changes in the position of the arm to determine at least one of a volume of blood in the blood chamber and a position of the eccentric shaft.
Claim 7
Dependent Claim
28 words
The blood pump of claim 5 further comprising the position sensor disposed adjacent an intermediate point of the arm for detecting changes in the angle of the arm.
Claim 8
Dependent Claim
15 words
The blood pump of claim 6 wherein the position sensor comprises an eddy current sensor.
Claim 9
Dependent Claim
12 words
The blood pump of claim 6 wherein the bellows is hermetically sealed.
Claim 10
Dependent Claim
45 words
The blood pump according to claim 1 further comprising a bellows member sealing an end of the drive chamber and around the second end of the arm, the bellows permitting pivotal movement of the arm while preventing bodily fluids from entering into the drive chamber.
Claim 11
Dependent Claim
20 words
The blood pump of claim 1 further comprising an implantable electronic controller operatively connected to and controlling the drive mechanism.
Claim 12
Dependent Claim
26 words
The blood pump of claim 1 further comprising the compressible blood chamber having a textured inner surface for promoting the development of a biologic neointimal lining.
Claim 13
Dependent Claim
303 words
A blood pump apparatus implantable in a patient for supplying blood to the patient's circulatory system, the blood pump apparatus comprising: a. a pump housing having a drive chamber b. a base connected to the pump housing; c. a compressible blood chamber having a first side adjacent the base, the blood chamber having an inlet and an outlet each connectable to the circulatory system; d. a movable portion adjacent a second side of the blood chamber opposite the base, at least a portion of the movable portion positionable adjacent a portion of a lung such that the movement of the movable portion is opposed by the lung as the blood is pumped whereby portions of volumetric changes in the compressible blood chamber are compensated for by the lung; e. an arm having a first end pivotably connected to the movable portion; f. a drive mechanism housed in the drive chamber and connected to a second end of the arm, wherein the drive mechanism operates the arm to compress the blood chamber between the movable portion and the base to pump blood through the circulatory system; g. an eccentric shaft having an input end and an output end; h. the arm having a second end movable by the output end of the eccentric shaft; i. a motor housed in the drive chamber, the motor having an output shaft connected to the input end of the eccentric shaft for rotating the eccentric shaft thereby causing the arm to operate the movable portion to compress and release the blood chamber to pump blood through the circulatory system; and j. the second end of the arm having riding contact with the output end of the eccentric shaft, the eccentric shaft driving the arm during a pumping stroke and the arm having unrestricted movement during a return stroke.
Claim 14
Dependent Claim
303 words
A blood pump apparatus implantable in a patient for supplying blood to the patient's circulatory system, the blood pump apparatus comprising: a. a pump housing having a drive chamber b. a base connected to the pump housing; c. a compressible blood chamber having a first side adjacent the base, the blood chamber having an inlet and an outlet each connectable to the circulatory system; d. a movable portion adjacent a second side of the blood chamber opposite the base, at least a portion of the movable portion positionable adjacent a portion of a lung such that the movement of the movable portion is opposed by the lung as the blood is pumped whereby portions of volumetric changes in the compressible blood chamber are compensated for by the lung; e. an arm having a first end pivotably connected to the movable portion; f. a drive mechanism housed in the drive chamber and connected to a second end of the arm, wherein the drive mechanism operates the arm to compress the blood chamber between the movable portion and the base to pump blood through the circulatory system; g. an eccentric shaft having an input end and an output end; h. the arm having a second end movable by the output end of the eccentric shaft; i. a motor housed in the drive chamber, the motor having an output shaft connected to the input end of the eccentric shaft for rotating the eccentric shaft thereby causing the arm to operate the movable portion to compress and release the blood chamber to pump blood through the circulatory system; and j. the second end of the arm having riding contact with the output end of the eccentric shaft, the eccentric shaft driving the arm during a pumping stroke and the arm having unrestricted movement during a return stroke.
Claim 15
Dependent Claim
30 words
The blood pump of claim 12 further comprising a roller bearing mounted on the output end of the eccentric shaft whereon the arm has riding contact on the roller bearing.
Claim 16
Dependent Claim
295 words
A blood pump apparatus implantable in a patient for supplying blood to the patient's circulatory system, the blood pump apparatus comprising: a. a pump housing having a drive chamber b. a base connected to the pump housing; c. a compressible blood chamber having a first side adjacent the base, the blood chamber having an inlet and an outlet each connectable to the circulatory system; d. a movable portion adjacent a second side of the blood chamber opposite the base, at least a portion of the movable portion positionable adjacent a portion of a lung such that the movement of the movable portion is opposed by the lung as the blood is pumped whereby portions of volumetric changes in the compressible blood chamber are compensated for by the lung; e. an arm having a first end pivotably connected to the movable portion; f. a drive mechanism housed in the drive chamber and connected to a second end of the arm, wherein the drive mechanism operates the arm to compress the blood chamber between the movable portion and the base to pump blood through the circulatory system; g. an eccentric shaft having an input end and an output end; h. the arm having a second end movable by the output end of the eccentric shaft; i. a motor housed in the drive chamber, the motor having an output shaft connected to the input end of the eccentric shaft for rotating the eccentric shaft thereby causing the arm to operate the movable portion to compress and release the blood chamber to pump blood through the circulatory system; j. a speed reducer connected intermediate the output shaft of the motor and the input end of the eccentric shaft; and k. wherein the speed reducer comprises a planetary gear reducer.
Claim 17
Dependent Claim
295 words
A blood pump apparatus implantable in a patient for supplying blood to the patient's circulatory system, the blood pump apparatus comprising: a. a pump housing having a drive chamber b. a base connected to the pump housing; c. a compressible blood chamber having a first side adjacent the base, the blood chamber having an inlet and an outlet each connectable to the circulatory system; d. a movable portion adjacent a second side of the blood chamber opposite the base, at least a portion of the movable portion positionable adjacent a portion of a lung such that the movement of the movable portion is opposed by the lung as the blood is pumped whereby portions of volumetric changes in the compressible blood chamber are compensated for by the lung; e. an arm having a first end pivotably connected to the movable portion; f. a drive mechanism housed in the drive chamber and connected to a second end of the arm, wherein the drive mechanism operates the arm to compress the blood chamber between the movable portion and the base to pump blood through the circulatory system; g. an eccentric shaft having an input end and an output end; h. the arm having a second end movable by the output end of the eccentric shaft; i. a motor housed in the drive chamber, the motor having an output shaft connected to the input end of the eccentric shaft for rotating the eccentric shaft thereby causing the arm to operate the movable portion to compress and release the blood chamber to pump blood through the circulatory system; j. a speed reducer connected intermediate the output shaft of the motor and the input end of the eccentric shaft; and k. wherein the speed reducer comprises a planetary gear reducer.
Claim 18
Dependent Claim
19 words
The blood pump of claim 14 wherein the planetary gear reducer is a three gear differential type speed reducer.
Claim 19
Dependent Claim
16 words
The blood pump of claim 15 wherein the planetary gear reducer has an internal ring gear.
Claim 20
Dependent Claim
21 words
The blood pump of claim 16 wherein the planetary gear reducer has four planet gears engaged with said internal ring gear.
Claim 21
Dependent Claim
235 words
A blood pump apparatus implantable in a patient for supplying blood to the patient's circulatory system, the blood pump apparatus comprising: a. a pump housing having a drive chamber b. a base connected to the pump housing; c. a compressible blood chamber having a first side adjacent the base, the blood chamber having an inlet and an outlet each connectable to the circulatory system; d. a movable portion adjacent a second side of the blood chamber opposite the base, at least a portion of the movable portion positionable adjacent a portion of a lung such that the movement of the movable portion is opposed by the lung as the blood is pumped whereby portions of volumetric changes in the compressible blood chamber are compensated for by the lung; e. an arm having a first end pivotably connected to the movable portion; f. a drive mechanism housed in the drive chamber and connected to a second end of the arm, wherein the drive mechanism operates the arm to compress the blood chamber between the movable portion and the base to pump blood through the circulatory system; and g. an enclosure bag surrounding the blood pump and having a sealable opening for at least the inlet and the outlet of the blood chamber wherein the enclosure bag provides a tissue friendly surface and prevents such tissue from becoming caught between any moving parts of the blood pump.
Claim 22
Dependent Claim
235 words
A blood pump apparatus implantable in a patient for supplying blood to the patient's circulatory system, the blood pump apparatus comprising: a. a pump housing having a drive chamber b. a base connected to the pump housing; c. a compressible blood chamber having a first side adjacent the base, the blood chamber having an inlet and an outlet each connectable to the circulatory system; d. a movable portion adjacent a second side of the blood chamber opposite the base, at least a portion of the movable portion positionable adjacent a portion of a lung such that the movement of the movable portion is opposed by the lung as the blood is pumped whereby portions of volumetric changes in the compressible blood chamber are compensated for by the lung; e. an arm having a first end pivotably connected to the movable portion; f. a drive mechanism housed in the drive chamber and connected to a second end of the arm, wherein the drive mechanism operates the arm to compress the blood chamber between the movable portion and the base to pump blood through the circulatory system; and g. an enclosure bag surrounding the blood pump and having a sealable opening for at least the inlet and the outlet of the blood chamber wherein the enclosure bag provides a tissue friendly surface and prevents such tissue from becoming caught between any moving parts of the blood pump.
Claim 23
Dependent Claim
22 words
The blood pump of claim 18 wherein the enclosure bag is deformable such that there is no pressure differential surrounding the bag.
Claim 24
Dependent Claim
258 words
A blood pump apparatus implantable in a patient for supplying blood to the patient's circulatory system, the blood pump apparatus comprising: a. a pump housing having a drive portion and a pump portion; b. a compressible blood chamber disposed in the pump portion, the blood chamber having an inlet and an outlet each connectable to the circulatory system; c. at least one movable portion exterior to the base and housing and adjacent at least one side of the blood chamber for compressing the blood chamber to pump blood, at least a portion of the at least one movable portion positionable adjacent a portion of a lung such that the movement of the at least one movable portion is opposed by the lung as the blood is pumped whereby portions of volumetric changes in the compressible blood chamber are compensated for by the lung; d. at least one arm having a first end and an intermediate portion, the first end pivotably connected to the at least one movable portion and the intermediate portion pivotably connected to the housing; e. an eccentric shaft having an input end and an output end; f. the arm having a second end movable by the output end of the eccentric shaft; and g. a motor housed in the drive chamber, the motor having an output shaft connected to the input end of the eccentric shaft for rotating the eccentric shaft thereby causing the arm to operate the at least one movable portion to compress the blood chamber to pump blood through the circulatory system.
Claim 25
Dependent Claim
258 words
A blood pump apparatus implantable in a patient for supplying blood to the patient's circulatory system, the blood pump apparatus comprising: a. a pump housing having a drive portion and a pump portion; b. a compressible blood chamber disposed in the pump portion, the blood chamber having an inlet and an outlet each connectable to the circulatory system; c. at least one movable portion exterior to the base and housing and adjacent at least one side of the blood chamber for compressing the blood chamber to pump blood, at least a portion of the at least one movable portion positionable adjacent a portion of a lung such that the movement of the at least one movable portion is opposed by the lung as the blood is pumped whereby portions of volumetric changes in the compressible blood chamber are compensated for by the lung; d. at least one arm having a first end and an intermediate portion, the first end pivotably connected to the at least one movable portion and the intermediate portion pivotably connected to the housing; e. an eccentric shaft having an input end and an output end; f. the arm having a second end movable by the output end of the eccentric shaft; and g. a motor housed in the drive chamber, the motor having an output shaft connected to the input end of the eccentric shaft for rotating the eccentric shaft thereby causing the arm to operate the at least one movable portion to compress the blood chamber to pump blood through the circulatory system.
Claim 26
Dependent Claim
27 words
The blood pump of claim 20 further comprising a speed reducer connected intermediate the output shaft of the motor and the input end of the eccentric shaft.
Claim 27
Dependent Claim
24 words
The blood pump of claim 20 wherein the arm is mounted in a plane orthogonal to an axis of rotation of the eccentric shaft.
Claim 28
Dependent Claim
46 words
The blood pump of claim 20 further comprising a position sensor disposed in the drive portion for detecting changes in the position of the arm to determine at least one of a volume of blood in the blood chamber and a position of the eccentric shaft.
Claim 29
Dependent Claim
28 words
The blood pump of claim 23 further comprising the position sensor disposed adjacent an intermediate point of the arm for detecting changes in the angle of the arm.
Claim 30
Dependent Claim
15 words
The blood pump of claim 24 wherein the position sensor comprises an eddy current sensor.
Claim 31
Dependent Claim
45 words
The blood pump according to claim 20 further comprising a bellows member sealing an end of the drive portion and around the intermediate portion of the arm, the bellows permitting pivotal movement of the arm while preventing bodily fluids from entering into the drive chamber.
Claim 32
Dependent Claim
12 words
The blood pump of claim 26 wherein the bellows is hermetically sealed.
Claim 33
Dependent Claim
19 words
The blood pump of claim 20 further comprising an implantable electronic controller operatively connected to and controlling the motor.
Claim 34
Dependent Claim
26 words
The blood pump of claim 20 further comprising the compressible blood chamber having a textured inner surface for promoting the development of a biologic neointimal lining.
Claim 35
Dependent Claim
234 words
A blood pump apparatus implantable in a patient for supplying blood to the patient's circulatory system, the blood pump apparatus comprising: a. a pump housing having a drive portion and a pump portion; b. a compressible blood chamber disposed in the pump portion, the blood chamber having an inlet and an outlet each connectable to the circulatory system; c. at least one movable portion adjacent at least one side of the blood chamber for compressing the blood chamber to pump blood; d. at least one arm having a first end and an intermediate portion, the first end pivotably connected to the at least one movable portion and the intermediate portion pivotably connected to the housing; e. an eccentric shaft having an input end and an output end; f. the arm having a second end movable by the output end of the eccentric shaft; g. a motor housed in the drive portion, the motor having an output shaft connected to the input end of the eccentric shaft for rotating the eccentric shaft thereby causing the arm to operate the at least one movable portion to compress the blood chamber to pump blood through the circulatory system; and h. the second end of the arm having riding contact with the output end of the eccentric shaft, the eccentric shaft driving the arm during a pumping stroke and the arm having unrestricted movement during a return stroke.
Claim 36
Dependent Claim
234 words
A blood pump apparatus implantable in a patient for supplying blood to the patient's circulatory system, the blood pump apparatus comprising: a. a pump housing having a drive portion and a pump portion; b. a compressible blood chamber disposed in the pump portion, the blood chamber having an inlet and an outlet each connectable to the circulatory system; c. at least one movable portion adjacent at least one side of the blood chamber for compressing the blood chamber to pump blood; d. at least one arm having a first end and an intermediate portion, the first end pivotably connected to the at least one movable portion and the intermediate portion pivotably connected to the housing; e. an eccentric shaft having an input end and an output end; f. the arm having a second end movable by the output end of the eccentric shaft; g. a motor housed in the drive portion, the motor having an output shaft connected to the input end of the eccentric shaft for rotating the eccentric shaft thereby causing the arm to operate the at least one movable portion to compress the blood chamber to pump blood through the circulatory system; and h. the second end of the arm having riding contact with the output end of the eccentric shaft, the eccentric shaft driving the arm during a pumping stroke and the arm having unrestricted movement during a return stroke.
Claim 37
Dependent Claim
25 words
The blood pump of claim 30 further comprising a roller bearing mounted on the end of the eccentric shaft whereon the arm has riding contact.
Claim 38
Dependent Claim
226 words
A blood pump apparatus implantable in a patient for supplying blood to the patient's circulatory system, the blood pump apparatus comprising: a. a pump housing having a drive portion and a pump portion; b. a compressible blood chamber disposed in the pump portion, the blood chamber having an inlet and an outlet each connectable to the circulatory system; c. at least one movable portion adjacent at least one side of the blood chamber for compressing the blood chamber to pump blood; d. at least one arm having a first end and an intermediate portion, the first end pivotably connected to the at least one movable portion and the intermediate portion pivotably connected to the housing; e. an eccentric shaft having an input end and an output end; f. the arm having a second end movable by the output end of the eccentric shaft; g. a motor housed in the drive portion the motor having an output shaft connected to the input end of the eccentric shaft for rotating the eccentric shaft thereby causing the arm to operate the at least one movable portion to compress the blood chamber to pump blood through the circulatory system; h. a speed reducer connected intermediate the output shaft of the motor and the input end of the eccentric shaft; and i. wherein the speed reducer comprises a planetary gear reducer.
Claim 39
Dependent Claim
226 words
A blood pump apparatus implantable in a patient for supplying blood to the patient's circulatory system, the blood pump apparatus comprising: a. a pump housing having a drive portion and a pump portion; b. a compressible blood chamber disposed in the pump portion, the blood chamber having an inlet and an outlet each connectable to the circulatory system; c. at least one movable portion adjacent at least one side of the blood chamber for compressing the blood chamber to pump blood; d. at least one arm having a first end and an intermediate portion, the first end pivotably connected to the at least one movable portion and the intermediate portion pivotably connected to the housing; e. an eccentric shaft having an input end and an output end; f. the arm having a second end movable by the output end of the eccentric shaft; g. a motor housed in the drive portion the motor having an output shaft connected to the input end of the eccentric shaft for rotating the eccentric shaft thereby causing the arm to operate the at least one movable portion to compress the blood chamber to pump blood through the circulatory system; h. a speed reducer connected intermediate the output shaft of the motor and the input end of the eccentric shaft; and i. wherein the speed reducer comprises a planetary gear reducer.
Claim 40
Dependent Claim
19 words
The blood pump of claim 32 wherein the planetary gear reducer is a three gear differential type speed reducer.
Claim 41
Dependent Claim
16 words
The blood pump of claim 33 wherein the planetary gear reducer has an internal ring gear.
Claim 42
Dependent Claim
21 words
The blood pump of claim 34 wherein the planetary gear reducer has four planet gears engaged with said internal ring gear.
Claim 43
Dependent Claim
245 words
A blood pump apparatus implantable in a patient for supplying blood to the patient's circulatory system, the blood pump apparatus comprising: a. a pump housing having a drive portion and a pump portion; b. a compressible blood chamber disposed in the pump portion, the blood chamber having an inlet and an outlet each connectable to the circulatory system; c. at least one movable portion adjacent at least one side of the blood chamber for compressing the blood chamber to pump blood; d. at least one arm having a first end and an intermediate portion, the first end pivotably connected to the at least one movable portion and the intermediate portion pivotably connected to the housing; e. an eccentric shaft having an input end and an output end; f. the arm having a second end movable by the output end of the eccentric shaft; g. a motor housed in the drive portion, the motor having an output shaft connected to the input end of the eccentric shaft for rotating the eccentric shaft thereby causing the arm to operate the at least one movable portion to compress the blood chamber to pump blood through the circulatory system; and h. an enclosure bag surrounding the blood pump and having a sealable opening for at least the inlet and the outlet of the blood chamber wherein the enclosure bag provides a tissue friendly surface and prevents such tissue from becoming caught between any moving parts of the blood pump.
Claim 44
Dependent Claim
245 words
A blood pump apparatus implantable in a patient for supplying blood to the patient's circulatory system, the blood pump apparatus comprising: a. a pump housing having a drive portion and a pump portion; b. a compressible blood chamber disposed in the pump portion, the blood chamber having an inlet and an outlet each connectable to the circulatory system; c. at least one movable portion adjacent at least one side of the blood chamber for compressing the blood chamber to pump blood; d. at least one arm having a first end and an intermediate portion, the first end pivotably connected to the at least one movable portion and the intermediate portion pivotably connected to the housing; e. an eccentric shaft having an input end and an output end; f. the arm having a second end movable by the output end of the eccentric shaft; g. a motor housed in the drive portion, the motor having an output shaft connected to the input end of the eccentric shaft for rotating the eccentric shaft thereby causing the arm to operate the at least one movable portion to compress the blood chamber to pump blood through the circulatory system; and h. an enclosure bag surrounding the blood pump and having a sealable opening for at least the inlet and the outlet of the blood chamber wherein the enclosure bag provides a tissue friendly surface and prevents such tissue from becoming caught between any moving parts of the blood pump.
Claim 45
Dependent Claim
22 words
The blood pump of claim 36 wherein the enclosure bag is deformable such that there is no pressure differential surrounding the bag.
Claim 46
Dependent Claim
208 words
A blood pump apparatus implantable in a patient for supplying blood to the patient's circulatory system, the blood pump apparatus comprising: a. a pump housing having a drive portion and a pump portion; b. a compressible blood chamber disposed in the pump portion, the blood chamber having an inlet and an outlet each connectable to the circulatory system; c. at least one movable portion adjacent at least one side of the blood chamber for compressing the blood chamber to pump blood; d. at least one arm having a first end connected to the at least one movable portion and an intermediate portion pivotably connected to the housing; e. a drive mechanism housed in the drive portion and connected to a second end of the at least one arm wherein the drive mechanism causes the at least one arm to pivot about the intermediate portion to cause the at least one movable portion to compress the blood chamber to pump blood through the circulatory system; and f. a bellows member sealing an end of the drive portion and around the second end of the at least one arm, the bellows permitting pivotal movement of the at least one arm while preventing bodily fluids from entering into the drive portion.
Claim 47
Dependent Claim
208 words
A blood pump apparatus implantable in a patient for supplying blood to the patient's circulatory system, the blood pump apparatus comprising: a. a pump housing having a drive portion and a pump portion; b. a compressible blood chamber disposed in the pump portion, the blood chamber having an inlet and an outlet each connectable to the circulatory system; c. at least one movable portion adjacent at least one side of the blood chamber for compressing the blood chamber to pump blood; d. at least one arm having a first end connected to the at least one movable portion and an intermediate portion pivotably connected to the housing; e. a drive mechanism housed in the drive portion and connected to a second end of the at least one arm wherein the drive mechanism causes the at least one arm to pivot about the intermediate portion to cause the at least one movable portion to compress the blood chamber to pump blood through the circulatory system; and f. a bellows member sealing an end of the drive portion and around the second end of the at least one arm, the bellows permitting pivotal movement of the at least one arm while preventing bodily fluids from entering into the drive portion.
Claim 48
Dependent Claim
12 words
The blood pump of claim 38 wherein the bellows is hermetically sealed.
Claim 49
Dependent Claim
99 words
The blood pump of claim 38 wherein the drive mechanism further comprises: a. an eccentric shaft having an input end and an output end; b. the at least one arm having a second end movable by the output end of the eccentric shaft; and c. a motor housed in the drive chamber, the motor having an output shaft connected to the input end of the eccentric shaft for rotating the eccentric shaft thereby causing the at least one arm to operate the at least one movable portion to compress the blood chamber to pump blood through the circulatory system.
Claim 50
Dependent Claim
54 words
The blood pump of claim 40 further comprising the second end of the at least one arm having riding contact with the output end of the eccentric shaft, the eccentric shaft driving the at least one arm during a pumping stroke and the at least one arm having unrestricted movement during a return stroke.
Claim 51
Dependent Claim
33 words
The blood pump of claim 41 further comprising a roller bearing mounted on the output end of the eccentric shaft whereon the at least one arm has riding contact on the roller bearing.
Claim 52
Dependent Claim
27 words
The blood pump of claim 40 further comprising a speed reducer connected intermediate the output shaft of the motor and the opposite end of the eccentric shaft.
Claim 53
Dependent Claim
15 words
The blood pump of claim 43 wherein the speed reducer comprises a planetary gear reducer.
Claim 54
Dependent Claim
19 words
The blood pump of claim 44 wherein the planetary gear reducer is a three gear differential type speed reducer.
Claim 55
Dependent Claim
16 words
The blood pump of claim 45 wherein the planetary gear reducer has an internal ring gear.
Claim 56
Dependent Claim
21 words
The blood pump of claim 46 wherein the planetary gear reducer has four planet gears engaged with said internal ring gear.
Claim 57
Dependent Claim
24 words
The blood pump of claim 40 wherein the arm is mounted in a plane orthogonal to an axis of rotation of the eccentric shaft.
Claim 58
Dependent Claim
49 words
The blood pump of claim 38 further comprising a position sensor disposed in the drive portion for detecting changes in the position of the at least one arm to determine at least one of a volume of blood in the blood chamber and a position of the eccentric shaft.
Claim 59
Dependent Claim
34 words
The blood pump of claim 49 further comprising the position sensor disposed adjacent an intermediate point of the at least one arm for detecting changes in the angle of the at least one arm.
Claim 60
Dependent Claim
15 words
The blood pump of claim 50 wherein the position sensor comprises an eddy current sensor.
Claim 61
Dependent Claim
20 words
The blood pump of claim 38 further comprising an implantable electronic controller operatively connected to and controlling the drive mechanism.
Claim 62
Dependent Claim
56 words
The blood pump of claim 38 further comprising an enclosure bag surrounding the blood pump and having a sealable opening for at least the inlet and the outlet of the blood chamber wherein the enclosure bag provides a tissue friendly surface and prevents such tissue from becoming caught between any moving parts of the blood pump.
Claim 63
Dependent Claim
22 words
The blood pump of claim 53 wherein the enclosure bag is deformable such that there is no pressure differential surrounding the bag.
Claim 64
Dependent Claim
26 words
The blood pump of claim 38 further comprising the compressible blood chamber having a textured inner surface for promoting the development of a biologic neointimal lining.
Claim 65
Dependent Claim
168 words
A blood pump apparatus implantable in a patient adjacent said patient's lung for supplying blood to said patient's circulatory system, said blood pump apparatus comprising: a. a pump housing having a drive chamber b. a base connected to the pump housing; c. a compressible blood chamber having a first side adjacent said base, said blood chamber having an inlet and an outlet each connectable to said circulatory system; d. a movable portion exterior to said base and housing and adjacent a second side of said blood chamber opposite said first side, said movable portion positionable adjacent a portion of said lung such that as the blood is pumped portions of volumetric changes in said compressible blood chamber are compensated for during movement of said movable portion; and e. a drive mechanism housed in said drive chamber and connected to said movable portion, said drive mechanism operating said movable portion to compress said blood chamber between said movable portion and said base to pump blood through said circulatory system.
Claim 66
Dependent Claim
168 words
A blood pump apparatus implantable in a patient adjacent said patient's lung for supplying blood to said patient's circulatory system, said blood pump apparatus comprising: a. a pump housing having a drive chamber b. a base connected to the pump housing; c. a compressible blood chamber having a first side adjacent said base, said blood chamber having an inlet and an outlet each connectable to said circulatory system; d. a movable portion exterior to said base and housing and adjacent a second side of said blood chamber opposite said first side, said movable portion positionable adjacent a portion of said lung such that as the blood is pumped portions of volumetric changes in said compressible blood chamber are compensated for during movement of said movable portion; and e. a drive mechanism housed in said drive chamber and connected to said movable portion, said drive mechanism operating said movable portion to compress said blood chamber between said movable portion and said base to pump blood through said circulatory system.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-11-08 | 2003-05-10 | 2003-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-08 | 2007-05-10 | 2007-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-08 | 2011-05-10 | 2011-11-09 | $7700.00 | Window Closed / Lapsed |