Patent US3811800A successfully refreshed from Google Patents.
US3811800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood pump
Assignee: Individual
•
Filing: 1972-07-12
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Granted: 1974-05-21
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Expires: 1992-07-12
Abstract
Abstract This invention relates to a pump for an ''''artificial kidney machine'''', or hemodialysis device; and primarily is designed for the pumping of blood for purification in such a system using the recently announced procedure of ''''single needle'''' dialysis, whereby a single needle is temporarily inserted into a vein or artery of a patient through which blood is withdrawn from the vein for purification and returned to the patient through the same needle. Such a dialysis system requires, in addition to the filter and pump, a device commonly called an ''''occluder'''' by means of which purified blood from the filter is prevented from flowing to the needle during the suction stroke of the pump when blood is withdrawn from the patient and is open to flow during the pumping stroke.
Inventors
- 👤 K Shill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:58
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/08; F04B43/10; F04B43/113; A; A61; A61M; A61M1/00; A61M1/14; A61M1/30; A61M1/301; A61M1/302; A61M1/305; A61M1/307; A61M60/00; A61M60/10; A61M60/104; A61M60/109; A61M60/113; A61M60/20; A61M60/247; A61M60/253; A61M60/258; A61M60/268; A61M60/279; A61M60/284; A61M60/30; A61M60/36; A61M60/37; A61M60/40; A61M60/424; A61M60/427; A61M60/43; A61M60/435; A61M60/80; A61M60/845; A61M60/851; F04B7/00; F04B7/02; F04B7/0266; F04B7/0275; A61M60/855; A61M60/89; A61M60/892
Claims Analysis
Total Claims: 43
Claim 1
Independent Claim
166 words
A surgical pump comprising: 1. a casing; 2. a longitudinal duct through said casing adapted to receive a blood tube; 3. an inlet valve member in said casing adjacent one end of said duct and an outlet valve member in said casing adjacent the other end of said duct each of said valves comprising: a. a cylinder within said casing, b. a piston operating in said cylinder, said piston having a projection engaging said blood tube; and c. means for alternately supplying fluid under pressure to and draining fluid from said cylinder; 4. a pressure tube within said duct and lying adjacent said blood tube; 5. means for supplying fluid under pressure to said pressure tube substantially simultaneously with the opening of said outlet valve and the closing of said inlet valve and for draining said pressure tube and substantially simultaneously opening said inlet valve and closing said outlet valve; and 6. resilient tube adapted to lie in said duct and leading into a discharge line.
Claim 2
Dependent Claim
166 words
A surgical pump comprising: 1. a casing; 2. a longitudinal duct through said casing adapted to receive a blood tube; 3. an inlet valve member in said casing adjacent one end of said duct and an outlet valve member in said casing adjacent the other end of said duct each of said valves comprising: a. a cylinder within said casing, b. a piston operating in said cylinder, said piston having a projection engaging said blood tube; and c. means for alternately supplying fluid under pressure to and draining fluid from said cylinder; 4. a pressure tube within said duct and lying adjacent said blood tube; 5. means for supplying fluid under pressure to said pressure tube substantially simultaneously with the opening of said outlet valve and the closing of said inlet valve and for draining said pressure tube and substantially simultaneously opening said inlet valve and closing said outlet valve; and 6. resilient tube adapted to lie in said duct and leading into a discharge line.
Claim 3
Dependent Claim
55 words
The apparatus of claim 1 comprising also an occluder in the discharge line of said pump and means for operating said occluder to open said discharge line to flow simultaneously with the opening of the outlet valve to flow and closing the occluder to flow simultaneously with the closing of said outlet valve to flow.
Claim 4
Dependent Claim
12 words
a longitudinal duct through said casing adapted to receive a blood tube;
Claim 5
Dependent Claim
12 words
a longitudinal duct through said casing adapted to receive a blood tube;
Claim 6
Dependent Claim
16 words
a longitudinal duct through said casing, said duct being adapted to receive a flexible blood tube,
Claim 7
Dependent Claim
16 words
a longitudinal duct through said casing, said duct being adapted to receive a flexible blood tube,
Claim 8
Dependent Claim
12 words
a power supply conduit in said casing for supplying fluid under pressure,
Claim 9
Dependent Claim
12 words
a power supply conduit in said casing for supplying fluid under pressure,
Claim 10
Dependent Claim
71 words
an inlet valve member in said casing adjacent one end of said duct and an outlet valve member in said casing adjacent the other end of said duct each of said valves comprising: a. a cylinder within said casing, b. a piston operating in said cylinder, said piston having a projection engaging said blood tube; and c. means for alternately supplying fluid under pressure to and draining fluid from said cylinder;
Claim 11
Dependent Claim
71 words
an inlet valve member in said casing adjacent one end of said duct and an outlet valve member in said casing adjacent the other end of said duct each of said valves comprising: a. a cylinder within said casing, b. a piston operating in said cylinder, said piston having a projection engaging said blood tube; and c. means for alternately supplying fluid under pressure to and draining fluid from said cylinder;
Claim 12
Dependent Claim
16 words
The apparatus of claim 1 comprising also means for measuring the flow from said pressure tube.
Claim 13
Dependent Claim
41 words
A dialysis pumping system for use in connection with a single needle dialysis technique in a kidney machine in which blood is taken from a patient and returned to the patient after treatment through a single needle, said pumping system comprising:
Claim 14
Dependent Claim
41 words
A dialysis pumping system for use in connection with a single needle dialysis technique in a kidney machine in which blood is taken from a patient and returned to the patient after treatment through a single needle, said pumping system comprising:
Claim 15
Dependent Claim
12 words
a pressure tube within said duct and lying adjacent said blood tube;
Claim 16
Dependent Claim
12 words
a pressure tube within said duct and lying adjacent said blood tube;
Claim 17
Dependent Claim
9 words
a drain conduit in said casing for draining fluid,
Claim 18
Dependent Claim
9 words
a drain conduit in said casing for draining fluid,
Claim 19
Dependent Claim
48 words
an inlet valve at one end of said longitudinal duct and a discharge valve at the other end of said duct, said valves comprising: a. cylinders in said casing communicating with said duct, and b. pistons within said cylinders, said pistons having projections bearing against said blood tube,
Claim 20
Dependent Claim
48 words
an inlet valve at one end of said longitudinal duct and a discharge valve at the other end of said duct, said valves comprising: a. cylinders in said casing communicating with said duct, and b. pistons within said cylinders, said pistons having projections bearing against said blood tube,
Claim 21
Dependent Claim
45 words
means for supplying fluid under pressure to said pressure tube substantially simultaneously with the opening of said outlet valve and the closing of said inlet valve and for draining said pressure tube and substantially simultaneously opening said inlet valve and closing said outlet valve; and
Claim 22
Dependent Claim
45 words
means for supplying fluid under pressure to said pressure tube substantially simultaneously with the opening of said outlet valve and the closing of said inlet valve and for draining said pressure tube and substantially simultaneously opening said inlet valve and closing said outlet valve; and
Claim 23
Dependent Claim
23 words
The pumping system of claim 4 wherein the inlet and discharge valves are operated by water pressure which is controlled by respective solenoids.
Claim 24
Dependent Claim
14 words
resilient tube adapted to lie in said duct and leading into a discharge line.
Claim 25
Dependent Claim
14 words
resilient tube adapted to lie in said duct and leading into a discharge line.
Claim 26
Dependent Claim
18 words
an enlarged chamber adjacent to, and communicating with, said duct between said inlet valve and said outlet valve,
Claim 27
Dependent Claim
18 words
an enlarged chamber adjacent to, and communicating with, said duct between said inlet valve and said outlet valve,
Claim 28
Dependent Claim
8 words
a resilient pressure tube in said enlarged chamber,
Claim 29
Dependent Claim
8 words
a resilient pressure tube in said enlarged chamber,
Claim 30
Dependent Claim
21 words
branch conduits leading from said power supply conduit to said inlet valve cylinder, said pressure tube and said discharge valve cylinder,
Claim 31
Dependent Claim
21 words
branch conduits leading from said power supply conduit to said inlet valve cylinder, said pressure tube and said discharge valve cylinder,
Claim 32
Dependent Claim
20 words
branch conduits leading from said inlet valve cylinder, said pressure tube and said discharge valve cylinder to said drain conduit,
Claim 33
Dependent Claim
20 words
branch conduits leading from said inlet valve cylinder, said pressure tube and said discharge valve cylinder to said drain conduit,
Claim 34
Dependent Claim
6 words
flow valves in said branch conduits,
Claim 35
Dependent Claim
6 words
flow valves in said branch conduits,
Claim 36
Dependent Claim
6 words
means for operating said flow valves,
Claim 37
Dependent Claim
6 words
means for operating said flow valves,
Claim 38
Dependent Claim
79 words
a timer for operating said last mentioned means in sequence to connect said inlet valve and said pressure tube to said pressure supply conduit and close them to drain and simultaneously opening said discharge valve to drain and closing it to the pressure supply conduit; and alternately open the inlet valve and the pressure tube to drain while closing them to the pressure conduit and simultaneously opening the discharge valve to the pressure conduit while closing it to drain;
Claim 39
Dependent Claim
79 words
a timer for operating said last mentioned means in sequence to connect said inlet valve and said pressure tube to said pressure supply conduit and close them to drain and simultaneously opening said discharge valve to drain and closing it to the pressure supply conduit; and alternately open the inlet valve and the pressure tube to drain while closing them to the pressure conduit and simultaneously opening the discharge valve to the pressure conduit while closing it to drain;
Claim 40
Dependent Claim
16 words
means for operating an occluder valve simultaneously and in parallel phases with said discharge valve; and
Claim 41
Dependent Claim
16 words
means for operating an occluder valve simultaneously and in parallel phases with said discharge valve; and
Claim 42
Dependent Claim
47 words
a blood tube adapted to lie in said duct and having a strongly resilient tube encompassing and cemented to the portion of said blood tube adapted to lie within said duct, whereby a vacuum will be applied to said blood tube when the pressure tube is draining.
Claim 43
Dependent Claim
47 words
a blood tube adapted to lie in said duct and having a strongly resilient tube encompassing and cemented to the portion of said blood tube adapted to lie within said duct, whereby a vacuum will be applied to said blood tube when the pressure tube is draining.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |