Patent US2823674A successfully refreshed from Google Patents.
US3557789A
Expired / Lapsed
US
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Therapeutic fluid flow control apparatus
Assignee: Individual
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Filing: 1967-11-20
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Granted: 1971-01-26
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Expires: 1987-11-20
Abstract
Abstract A device which automatically both agitates an anticoagulant medium with inflowing blood during a blood collection process and terminates the process after a predetermined quantity of blood has been collected. The device includes a weight longitudinally slidable on a lever type scale arm to permit accurate selection of the blood quantity collected.
Inventors
- 👤 Edward J Poitras
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:59
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/02; A61M1/024; A61M1/0245; Y; Y10; Y10S; Y10S604/00; Y10S604/903
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
225 words
Therapeutic fluid flow control apparatus of the type including a stationary support, a two-arm lever movable thereon about a pivot point, one arm of the lever adapted to support a fluid-collecting closed container having a length of flexible tubing for delivering fluid thereto, a counterbalance on the other lever arm, tube holding means for supporting the flexible tubing in a fixed position with respect to said stationary support and said lever, and pinch means adapted to pinch closed the flexible tubing in response to relative movement between said stationary support and said lever; the improvement to which comprises: a selector weight supported by and slidable on said other lever arm, said selector weight having top, bottom and side surfaces and defining a central cavity communicating with an opening in said bottom surface; a plurality of graduated stops on said other lever arm adapted for selective engagement with said selector weight so as to fix the longitudinal position thereof on said other lever arm; and a releasable biasing means for preventing relative movement between said selector weight and said other lever arm, said releasable biasing means being completely recessed within said selector weight cavity so as to be substantially hidden from view and manually operable only through said opening in said bottom surface to permit relative movement between said selector weight and said other lever arm.
Claim 2
Dependent Claim
225 words
Therapeutic fluid flow control apparatus of the type including a stationary support, a two-arm lever movable thereon about a pivot point, one arm of the lever adapted to support a fluid-collecting closed container having a length of flexible tubing for delivering fluid thereto, a counterbalance on the other lever arm, tube holding means for supporting the flexible tubing in a fixed position with respect to said stationary support and said lever, and pinch means adapted to pinch closed the flexible tubing in response to relative movement between said stationary support and said lever; the improvement to which comprises: a selector weight supported by and slidable on said other lever arm, said selector weight having top, bottom and side surfaces and defining a central cavity communicating with an opening in said bottom surface; a plurality of graduated stops on said other lever arm adapted for selective engagement with said selector weight so as to fix the longitudinal position thereof on said other lever arm; and a releasable biasing means for preventing relative movement between said selector weight and said other lever arm, said releasable biasing means being completely recessed within said selector weight cavity so as to be substantially hidden from view and manually operable only through said opening in said bottom surface to permit relative movement between said selector weight and said other lever arm.
Claim 3
Dependent Claim
48 words
Therapeutic fluid flow control apparatus according to claim 1 wherein said releasable biasing means comprises release means disposed in said cavity and adapted for manual actuation through said opening to deactivate said biasing means and allow said relative movement between said selector weight and said other lever arm.
Claim 4
Dependent Claim
106 words
Therapeutic fluid flow control apparatus according to claim 2 wherein said graduated stops comprise longitudinally disposed notches in said other lever arm, said releasable biasing means comprises a pin member slidably mounted within said cavity in said selector weight, said cavity being defined by a bore terminating in said bottom surface of said selector weight so as to expose an end of said pin member reforming said release means, said pin member having projection means adapted for selective engagement with said notches, and said releasable biasing means further comprising a spring member biasing saiD pin member downward and said projection means into engagement with said notches.
Claim 5
Dependent Claim
30 words
Therapeutic fluid flow control apparatus according to claim 3 wherein said projection means comprises a plurality of teeth spaced for simultaneous engagement with said notches in said other lever arm.
Claim 6
Dependent Claim
171 words
Blood collection apparatus comprising: movable support means adapted to hold a blood collecting closed container connected to a blood donor by a flexible tubing, scale means for indicating the weight of blood collected in the closed container; an electrically energizable drive means coupled to said movable support means and adapted upon energization to produce movement thereof and agitation of the fluid content of the closed container; closure means adapted to automatically interrupt blood flow by closing the flexible tubing in response to an indication by said scale means that a predetermined weight of blood has been collected in the closed container; and wherein said scale means comprises a two-arm lever pivotally mounted on a stationary support, said movable support means is attached to one arm of the lever and is movable with respect thereto, a counterbalance is attached to the other lever arm, and said closure means comprises pinch means adapted to pinch closed the flexible tubing in response to a predetermined relative movement between said stationary support and said lever.
Claim 7
Dependent Claim
171 words
Blood collection apparatus comprising: movable support means adapted to hold a blood collecting closed container connected to a blood donor by a flexible tubing, scale means for indicating the weight of blood collected in the closed container; an electrically energizable drive means coupled to said movable support means and adapted upon energization to produce movement thereof and agitation of the fluid content of the closed container; closure means adapted to automatically interrupt blood flow by closing the flexible tubing in response to an indication by said scale means that a predetermined weight of blood has been collected in the closed container; and wherein said scale means comprises a two-arm lever pivotally mounted on a stationary support, said movable support means is attached to one arm of the lever and is movable with respect thereto, a counterbalance is attached to the other lever arm, and said closure means comprises pinch means adapted to pinch closed the flexible tubing in response to a predetermined relative movement between said stationary support and said lever.
Claim 8
Dependent Claim
72 words
Blood collection apparatus according to claim 5 wherein said movable support means comprises a cradle attached to said one lever arm by a yoke member adapted to support the closed container, and said drive means comprises an electric motor and drive shaft operatively coupled between said cradle and said yoke member and adapted upon energization to produce movement of said cradle so as to agitate the blood content of the closed container.
Claim 9
Dependent Claim
40 words
Blood collection apparatus according to claim 6 including electrical leads connected to said electric motor, said leads terminating with a plug adapted for connection to a source of electrical power and having an intermediate portion attached to said stationary support.
Claim 10
Dependent Claim
52 words
Blood collection apparatus according to claim 6 including a selector weight supported by and slidable on said other lever arm, and a plurality of graduated stops on said other lever arm adapted for selective engagement with said selector weight so as to fix the longitudinal position thereof on said other lever arm.
Claim 11
Dependent Claim
27 words
Therapeutic fluid flow control apparatus according to claim 8 including a releasable biasing means for inhibiting relative movement between said selector weight and said other lever arm.
Claim 12
Dependent Claim
29 words
Therapeutic fluid flow control apparatus according to claim 9 wherein said releasable biasing means is substantially enclosed by said selector weight so as to be substantially hidden from view.
Claim 13
Dependent Claim
49 words
Therapeutic fluid flow control apparatus according to claim 10 wherein said releasable biasing means comprises release means disposed in the bottom surface of said selector weight and adapted upon actuation to deactivate said biasing means and allow uninhibited relative movement between said selector weight and said other lever arm.
Claim 14
Dependent Claim
112 words
Therapeutic fluid flow control apparatus according to claim 11 wherein said graduated stops comprise longitudinally disposed notches in said other lever arm, said releasable biasing means comprises a pin member slidably mounted within a bore in said selector weight, said bores terminating in the bottom surface of said selector weight, said bores terminating in the bottom surface of said selector weight so as to expose an end of said pin member forming said release means, said pin member having projection means adapted for selective engagement with said notches, and said releasable biasing means further comprising a spring member biasing said pin member downward and said projection means into engagement with said notches.
Claim 15
Dependent Claim
51 words
Blood collection apparatus according to claim 12 including a selector weight supported and slidable on said other lever arm, and a plurality of graduated stops on said other lever arm adapted for selective engagement with said selector weight so as to fix the longitudinal position thereof on said other lever arm.
Claim 16
Dependent Claim
30 words
Therapeutic fluid flow control apparatus according to claim 13 wherein said projection means comprises a plurality of teeth spaced for simultaneous engagement with said notches in said other lever arm.
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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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |