US4061142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling blood flow
Assignee: Sandoz Inc
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Filing: 1976-06-16
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Granted: 1977-12-06
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Expires: 1996-06-16
Abstract
Abstract This invention provides a single needle dialysis blood tubing occluder, comprising in a preferred aspect, a pair of pivotly mounted clamping arms having a leaf spring affixed to the non-pivot end of each occluder with the spring in slidable engagement with a symmetrical cam. Means are provided for actuating the cam, whereby the cam moves the tubing occluder to alternately occlude and non-occlude a pair of blood tubings.
Inventors
- 👤 Glenn L. Tuttle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:48
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/30; A61M39/00; A61M39/22; A61M39/28; A61M39/284
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
98 words
An apparatus for controlling blood flow through a pair of blood tubings in a single needle alternating blood flow system, which comprises in combination a support frame, a pair of pivotly mounted clamping arms connected to said frame and mounted parallel to one another, said arms having a leaf spring affixed to the non-pivot end of each clamping arm and extending axially therefrom, a rotatable cam positioned between and in slidable engagement with the leaf springs, and means for actuating the cam, whereby the cam moves the leaf spring-clamping arms to alternately occlude and non-occlude a blood tubing.
Claim 2
Independent Claim
98 words
An apparatus for controlling blood flow through a pair of blood tubings in a single needle alternating blood flow system, which comprises in combination a support frame, a pair of pivotly mounted clamping arms connected to said frame and mounted parallel to one another, said arms having a leaf spring affixed to the non-pivot end of each clamping arm and extending axially therefrom, a rotatable cam positioned between and in slidable engagement with the leaf springs, and means for actuating the cam, whereby the cam moves the leaf spring-clamping arms to alternately occlude and non-occlude a blood tubing.
Claim 3
Dependent Claim
57 words
The apparatus according to claim 1, wherein the cam is symmetrical, and the cam actuation means comprises a reversable motor having a shaft in rotatable communication with the cam, the shaft having a pair of spaced-apart lobes, and a pair of micro-switches, which are in slidable engagement with the shaft and in electrical communication with the motor.
Claim 4
Dependent Claim
14 words
The apparatus according to claim 2, wherein each clamping arm has an occluder tip.
Claim 5
Dependent Claim
19 words
The apparatus according to claim 3, wherein each occluder tip is on the non-pivoted end of a clamping arm.
Claim 6
Dependent Claim
21 words
The apparatus according to claim 4, wherein each occluder tip is situated normal to the horizontal axis of a clamping arm.
Claim 7
Dependent Claim
17 words
The apparatus according to claim 5, wherein the occluded tip is rounded at its blood contacting end.
Claim 8
Dependent Claim
30 words
The apparatus according to claim 6, wherein a resilient member is situated between each of the occluder arms, each end of the resilient member being attached to one occluder arm.
Claim 9
Dependent Claim
14 words
The apparatus according to claim 7, wherein the resilient member is a coiled spring.
Claim 10
Dependent Claim
24 words
The apparatus according to claim 8, wherein the frame on each side of the tubing occluder has a wall portion opposite the occluder tip.
Claim 11
Dependent Claim
16 words
The apparatus according to claim 9, wherein a clamping pad is positioned on the wall portion.
Claim 12
Dependent Claim
23 words
The apparatus according to claim 10, wherein the clamping area of the clamping pad is a hemicylindrical section projecting toward the occluder tip.
Claim 13
Dependent Claim
47 words
The apparatus according to claim 1, wherein the cam actuation means comprises a reversable motor having a shaft in rotatable communication with the cam, a pair of micro-switches, each switch in slidable contact with one end of the cam, the switches in electrical communication with the motor.
References Cited (Backward Citations)
US3543752A
Cited
US3654959A
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US3756234A
Cited
US3985134A
Cited
US3918490A
Cited
US3994294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-05 | 1981-06-06 | 1981-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-05 | 1985-06-06 | 1985-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-05 | 1989-06-06 | 1989-12-06 | $7700.00 | Window Closed / Lapsed |