US3791767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dialysis pumping system
Assignee: Individual
•
Filing: 1972-03-15
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Granted: 1974-02-12
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Expires: 1992-03-15
Abstract
Abstract This invention relates to a dialysis pump and pumping system primarily designed for the pumping of blood for purification in an ''''artificial kidney machine'''' using the recently announced system of the use of a single needle temporarily inserted into a vein or artery of a patient through which blood is withdrawn from the vein for purification and returned to the patient through the same needle.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 a device, commonly called an ''''occluder,'''' by means of which blood from the filter is prevented from entering the needle during the suction stroke of the pump of the machine and is open to flow during the pumping stroke which, in the preferred form, exerts a greater pressure than that supplied by the body during the suction stroke of the pump.
Inventors
- 👤 K Shill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:44
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/08; F04B43/10; 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; A61M60/30; A61M60/36; A61M60/37; A61M60/40; A61M60/424; A61M60/438; A61M60/449; A61M60/80; A61M60/845; A61M60/851; F04B53/00; F04B53/10; F04B53/102; F04B53/1035; A61M60/20; A61M60/247; A61M60/253; A61M60/268; A61M60/855; A61M60/89; A61M60/892; A61M60/894; Y; Y10; Y10S; Y10S128/00; Y10S128/03
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
241 words
A dialysis pumping system for use in connection with a single needle dialysis technique in a machine in which blood is taken from a patient and returned to the patient after treatment through a single needle, said pumping system comprising: a. a power section including 1. a chamber adapted to receive a liquid, 2. a flexible bellows for communicating with said chamber, 3. a solenoid for operating said bellows, and 4. an outlet from said chamber; b. a pumping section comprising 1. a cylinder, the intermediate portion of which has a larger diameter than its ends, 2. a cylindrical flexible diaphragm within said cylinder, adapted to receive a flexible tube carrying blood, said tube being provided with one-way check valves, and 3. means for sealing the ends of said cylindrical diaphragm to the ends of said cylinder and thereby providing a space between the cylinder and the cylindrical diaphragm, and 4. passageways into the space lying between said cylinder and said flexible diaphragm, said passageways communicating with the outlet from the power section chamber; c. an occluder comprising 1. a solenoid, 2. a rotary member rocked by said solenoid, 3. a slot in said rotary member adapted to receive a flexible tube leading from a dialysis device, 4. a fixed post adjacent one end of said slot in said rotary member; and d. a power section for sequentially supplying discrete pulses to said power section solenoid and to said occluder solenoid.
Claim 2
Dependent Claim
241 words
A dialysis pumping system for use in connection with a single needle dialysis technique in a machine in which blood is taken from a patient and returned to the patient after treatment through a single needle, said pumping system comprising: a. a power section including 1. a chamber adapted to receive a liquid, 2. a flexible bellows for communicating with said chamber, 3. a solenoid for operating said bellows, and 4. an outlet from said chamber; b. a pumping section comprising 1. a cylinder, the intermediate portion of which has a larger diameter than its ends, 2. a cylindrical flexible diaphragm within said cylinder, adapted to receive a flexible tube carrying blood, said tube being provided with one-way check valves, and 3. means for sealing the ends of said cylindrical diaphragm to the ends of said cylinder and thereby providing a space between the cylinder and the cylindrical diaphragm, and 4. passageways into the space lying between said cylinder and said flexible diaphragm, said passageways communicating with the outlet from the power section chamber; c. an occluder comprising 1. a solenoid, 2. a rotary member rocked by said solenoid, 3. a slot in said rotary member adapted to receive a flexible tube leading from a dialysis device, 4. a fixed post adjacent one end of said slot in said rotary member; and d. a power section for sequentially supplying discrete pulses to said power section solenoid and to said occluder solenoid.
Claim 3
Dependent Claim
8 words
a flexible bellows for communicating with said chamber,
Claim 4
Dependent Claim
8 words
a flexible bellows for communicating with said chamber,
Claim 5
Dependent Claim
24 words
a cylindrical flexible diaphragm within said cylinder, adapted to receive a flexible tube carrying blood, said tube being provided with one-way check valves, and
Claim 6
Dependent Claim
24 words
a cylindrical flexible diaphragm within said cylinder, adapted to receive a flexible tube carrying blood, said tube being provided with one-way check valves, and
Claim 7
Dependent Claim
7 words
a rotary member rocked by said solenoid,
Claim 8
Dependent Claim
7 words
a rotary member rocked by said solenoid,
Claim 9
Dependent Claim
22 words
The pumping system of claim 1 wherein the solenoid in the power section and the solenoid in the occluder are operated simultaneously.
Claim 10
Dependent Claim
22 words
The pumping system of claim 1 wherein the solenoid in the power section and the solenoid in the occluder are operated alternately.
Claim 11
Dependent Claim
17 words
a slot in said rotary member adapted to receive a flexible tube leading from a dialysis device,
Claim 12
Dependent Claim
17 words
a slot in said rotary member adapted to receive a flexible tube leading from a dialysis device,
Claim 13
Dependent Claim
28 words
means for sealing the ends of said cylindrical diaphragm to the ends of said cylinder and thereby providing a space between the cylinder and the cylindrical diaphragm, and
Claim 14
Dependent Claim
28 words
means for sealing the ends of said cylindrical diaphragm to the ends of said cylinder and thereby providing a space between the cylinder and the cylindrical diaphragm, and
Claim 15
Dependent Claim
7 words
a solenoid for operating said bellows, and
Claim 16
Dependent Claim
7 words
a solenoid for operating said bellows, and
Claim 17
Dependent Claim
10 words
an outlet from said chamber; b. a pumping section comprising
Claim 18
Dependent Claim
10 words
an outlet from said chamber; b. a pumping section comprising
Claim 19
Dependent Claim
27 words
passageways into the space lying between said cylinder and said flexible diaphragm, said passageways communicating with the outlet from the power section chamber; c. an occluder comprising
Claim 20
Dependent Claim
27 words
passageways into the space lying between said cylinder and said flexible diaphragm, said passageways communicating with the outlet from the power section chamber; c. an occluder comprising
Claim 21
Dependent Claim
33 words
a fixed post adjacent one end of said slot in said rotary member; and d. a power section for sequentially supplying discrete pulses to said power section solenoid and to said occluder solenoid.
Claim 22
Dependent Claim
33 words
a fixed post adjacent one end of said slot in said rotary member; and d. a power section for sequentially supplying discrete pulses to said power section solenoid and to said occluder solenoid.
Claim 23
Dependent Claim
113 words
The pumping system of claim 1 wherein the one-way valve in the flexible tube carrying blood comprises: a. a short stiff cylinder adapted to fit inside of said tube, said cylinder having an annular indentation adapted to receive a flexible ring, b. a flexible ring embracing said blood tube and seated tightly in the indentation in said cylinder, c. a conical valve member formed of soft material enclosiNg a metal plate of a diameter greater than the inside diameter of the indentation in said cylinder and a metal stem depending from said plate, and d. means affixed to said stem adapted to prevent said stem from passing through said indentation in said cylinder.
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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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |