US3811431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Programmed venous assist pump
Assignee: Individual
•
Filing: 1973-01-17
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Granted: 1974-05-21
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Expires: 1993-01-17
Abstract
Abstract An apparatus for providing circulatory assistance to a bed patient to preclude the pooling or clotting of venous blood in the legs or other extremities. A plurality of pairs of pressure cuffs are disposed along the legs of a patient needing circulatory assistance. Programming means are provided to facilitate the sequential inflation of said pressure cuffs, in such a manner that a progressive pressure wave travels up the patient''s legs pushing the venous blood ahead of it.
Inventors
- 👤 M Apstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:15
CPC Classifications
A; A61; A61H; A61H9/00; A61H9/005; A61H9/0078; A61H2201/00; A61H2201/50; A61H2201/5007; Y; Y10; Y10S; Y10S128/00; Y10S128/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
316 words
In a programmed venous assist pump for providing circulatory assistance to a patient including a source of compressed fluid, a plurality of pressure cuff means adapted to be disposed around selected portions of said patient, programming means for selectively connecting said source of compressed fluid to selected pressure cuff means in a predetermined sequence to generate a compressional wave along the selected portion of said patient which pushes the venous blood ahead of it toward the patient''s heart, said programming means including a valve means, and a timing motor for operating said valve means, the improvement comprising a valve means including: a. a housing having a substantially cylindrical longitudinal bore therein, a plurality of sets of holes in a face of said housing communicating with said longitudinal bore, each of said sets of holes including a fluid inlet hole, a fluid outlet hole, and an exhaust hole; b. means for connecting the fluid inlet hole of each set to said source of compressed fluid; c. means for connecting said fluid outlet hole of each set to a selected pressure cuff means; d. means for connecting said exhaust hole of each set to the atmosphere; and e. a substantially cylindrical rotor means, journaled in said longitudinal bore, the cylindrical periphery of said rotor being in sealing engagement with said sets of holes, said rotor means being divided into a plurality sectors, each of said sectors having depressions milled therein at selected locations for alignment with selected combinations of said fluid inlet holes, said fluid outlet holes, and said exhaust holes in each respective set of holes as said sectors of said rotor means are rotated past said face of said housing means in response to the operation of said timing motor, whereby said milled depressions permit the flow of fluid between the selected combinations of holes with which said milled depressions are aligned in each respective set.
Claim 2
Dependent Claim
316 words
In a programmed venous assist pump for providing circulatory assistance to a patient including a source of compressed fluid, a plurality of pressure cuff means adapted to be disposed around selected portions of said patient, programming means for selectively connecting said source of compressed fluid to selected pressure cuff means in a predetermined sequence to generate a compressional wave along the selected portion of said patient which pushes the venous blood ahead of it toward the patient''s heart, said programming means including a valve means, and a timing motor for operating said valve means, the improvement comprising a valve means including: a. a housing having a substantially cylindrical longitudinal bore therein, a plurality of sets of holes in a face of said housing communicating with said longitudinal bore, each of said sets of holes including a fluid inlet hole, a fluid outlet hole, and an exhaust hole; b. means for connecting the fluid inlet hole of each set to said source of compressed fluid; c. means for connecting said fluid outlet hole of each set to a selected pressure cuff means; d. means for connecting said exhaust hole of each set to the atmosphere; and e. a substantially cylindrical rotor means, journaled in said longitudinal bore, the cylindrical periphery of said rotor being in sealing engagement with said sets of holes, said rotor means being divided into a plurality sectors, each of said sectors having depressions milled therein at selected locations for alignment with selected combinations of said fluid inlet holes, said fluid outlet holes, and said exhaust holes in each respective set of holes as said sectors of said rotor means are rotated past said face of said housing means in response to the operation of said timing motor, whereby said milled depressions permit the flow of fluid between the selected combinations of holes with which said milled depressions are aligned in each respective set.
Claim 3
Dependent Claim
27 words
The invention of claim 1 wherein there is provided three of said sets of holes, each of said sets being associated with a selected pressure cuff means.
Claim 4
Dependent Claim
21 words
The invention of claim 1 wherein said timing motor may be adjusted to vary the speed of rotation of said motor.
Claim 5
Dependent Claim
189 words
In a programmed venous assist pump for providing circulatory assistance to a patient including a source of compressed fluid, a plurality of pressure cuff means adapted to be disposed around selected portions of said patient, programming means for selectively connecting said source of compressed fluid to selected pressure cuff means in a predetermined sequence to generate a compressional wave along the selected portion of said patient which pushes the venous blood ahead of it toward the patient''s heart, the improvement comprising a fluidic programming means including: a. a plurality of bistable fluidic switching means connected between said source of compressed fluid and a corresponding number of said pressure cuff means; and b. tank means association with each of said pressure cuff means having input means connected to each of said bistable fluidic switching means, means for generating an output signal in response to the pressure built up in each of said tank means, said output signals being applied to selected switching terminals of said bistable fluidic switching means to thereby control the timing cycle of said bistable switching means and the supply of fluid to said pressure cuff means.
Claim 6
Dependent Claim
189 words
In a programmed venous assist pump for providing circulatory assistance to a patient including a source of compressed fluid, a plurality of pressure cuff means adapted to be disposed around selected portions of said patient, programming means for selectively connecting said source of compressed fluid to selected pressure cuff means in a predetermined sequence to generate a compressional wave along the selected portion of said patient which pushes the venous blood ahead of it toward the patient''s heart, the improvement comprising a fluidic programming means including: a. a plurality of bistable fluidic switching means connected between said source of compressed fluid and a corresponding number of said pressure cuff means; and b. tank means association with each of said pressure cuff means having input means connected to each of said bistable fluidic switching means, means for generating an output signal in response to the pressure built up in each of said tank means, said output signals being applied to selected switching terminals of said bistable fluidic switching means to thereby control the timing cycle of said bistable switching means and the supply of fluid to said pressure cuff means.
Claim 7
Dependent Claim
189 words
In a programmed venous assist pump for providing circulatory assistance to a patient including a source of compressed fluid, a plurality of pressure cuff means adapted to be disposed around selected portions of said patient, programming means for selectively connecting said source of compressed fluid to selected pressure cuff means in a predetermined sequence to generate a compressional wave along the selected portion of said patient which pushes the venous blood ahead of it toward the patient''s heart, the improvement comprising a flueric programming means including: a. a plurality of bistable flueric switching means connected between said source of compressed fluid and a corresponding number of said pressure cuff means; and b. tank means associated with each of said pressure cuff means having input means connected to each of said bistable flueric switching means, means for generating an output signal in response to the pressure built up in each of said tank means, said output signals being applied to selected switching terminals of said bistable flueric switching means to thereby control the timing cycle of said bistable switching means and the supply of fluid to said pressure cuff means.
Claim 8
Dependent Claim
189 words
In a programmed venous assist pump for providing circulatory assistance to a patient including a source of compressed fluid, a plurality of pressure cuff means adapted to be disposed around selected portions of said patient, programming means for selectively connecting said source of compressed fluid to selected pressure cuff means in a predetermined sequence to generate a compressional wave along the selected portion of said patient which pushes the venous blood ahead of it toward the patient''s heart, the improvement comprising a flueric programming means including: a. a plurality of bistable flueric switching means connected between said source of compressed fluid and a corresponding number of said pressure cuff means; and b. tank means associated with each of said pressure cuff means having input means connected to each of said bistable flueric switching means, means for generating an output signal in response to the pressure built up in each of said tank means, said output signals being applied to selected switching terminals of said bistable flueric switching means to thereby control the timing cycle of said bistable switching means and the supply of fluid to said pressure cuff means.
References Cited (Backward Citations)
US2781041A
Cited
US3390674A
Cited
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 |