US3896803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve controlled single needle blood processing systems
Assignee: Betamite Electronic Devices
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Filing: 1973-08-20
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Granted: 1975-07-29
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Expires: 1993-08-20
Abstract
Abstract Herein disclosed is a blood flow control system for use with a single needle for drawing blood from and returning blood to the blood channels of a patient. A needle is included which has a body with a pair of output channels leading into separate tubes. A switch is enclosed therein which provides a passage from the needle into either of the two selected channels. A switch block is attached to the needle body and is operable to cause switching from either of the two output blood channels in the needle. The switching is caused by a control circuit coupled to the switch block. The control circuit is operable depending upon the pressure of the blood in the input line of the two selected channels and causes the blood to flow from the needle to the first channel when the pressure applied to the second channel reaches a predetermined level. Upon switching, the blood is caused to flow from the processing equipment back through the needle into the patient.
Inventors
- 👤 Barry Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:37
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/30; A61M1/301; A61M1/303; A61M1/305; A61M1/306
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
183 words
A blood access apparatus including: a needle body portion having a pair of holes drilled in one end thereof and a round bore drilled partially through on side thereof intersecting said pair of holes; a hollow needle in said needle body portion the end opposite said pair of holes and communicating with said round bore in said body portion; switching needle means in said round bore in said needle body portion including direction channels for switching through access from said needle to said pair of holes; a switching body portion having a channel therein which has a matching configuration of the needle body portion; means in said switching body portion to switch said switching means; said switching means including a protruding tongue; said switching body portion including a hole in one end thereof and a round bore in said channel which intersects with said hole; a rack and gear arrangement, said rack being disposed in said bore in said channel and engages said rack; and a grooved member engaging said gear having a groove which engages the protruding tongue on said switching means.
Claim 2
Dependent Claim
183 words
A blood access apparatus including: a needle body portion having a pair of holes drilled in one end thereof and a round bore drilled partially through on side thereof intersecting said pair of holes; a hollow needle in said needle body portion the end opposite said pair of holes and communicating with said round bore in said body portion; switching needle means in said round bore in said needle body portion including direction channels for switching through access from said needle to said pair of holes; a switching body portion having a channel therein which has a matching configuration of the needle body portion; means in said switching body portion to switch said switching means; said switching means including a protruding tongue; said switching body portion including a hole in one end thereof and a round bore in said channel which intersects with said hole; a rack and gear arrangement, said rack being disposed in said bore in said channel and engages said rack; and a grooved member engaging said gear having a groove which engages the protruding tongue on said switching means.
Claim 3
Dependent Claim
211 words
A blood access apparatus comprising: a needle body portion having a pair of holes in one end and a round bore through a side thereof intersecting said pair of holes; a hollow needle mounted within said needle body portion in the end opposite said pair of holes and communicating with said round bore in said body portion, said needle having an opening therethrough; switching means mounted within said round bore, said switching means including direction channels for switching access with said opening in said needle to either one or the other of said pair of holes; a switching body portion having a channel therein for retaining said needle body portion in said switching body portion; means mounted within said switching body portion to connect with and operate said switching means, said means includes connecting means mounted upon said switching means; said switching body portion including a hole through one end thereof and a round bore communicating with said channel which intersects with said hole; a rack and gear arrangement, said rack being disposed through the hole and said switching body portion, said gear being disposed in said round bore and engages said rack; and a member engaging said gear having cooperating means for engaging said connecting means of said switching means.
Claim 4
Dependent Claim
211 words
A blood access apparatus comprising: a needle body portion having a pair of holes in one end and a round bore through a side thereof intersecting said pair of holes; a hollow needle mounted within said needle body portion in the end opposite said pair of holes and communicating with said round bore in said body portion, said needle having an opening therethrough; switching means mounted within said round bore, said switching means including direction channels for switching access with said opening in said needle to either one or the other of said pair of holes; a switching body portion having a channel therein for retaining said needle body portion in said switching body portion; means mounted within said switching body portion to connect with and operate said switching means, said means includes connecting means mounted upon said switching means; said switching body portion including a hole through one end thereof and a round bore communicating with said channel which intersects with said hole; a rack and gear arrangement, said rack being disposed through the hole and said switching body portion, said gear being disposed in said round bore and engages said rack; and a member engaging said gear having cooperating means for engaging said connecting means of said switching means.
Claim 5
Dependent Claim
43 words
The blood access apparatus as defined in claim 2: wherein said switching body portion is provided with matching, adapted to connect with and support said needle body portion, means mounted in said switching body portion to connect with and operate said switching means.
Claim 6
Dependent Claim
31 words
The blood acces apparatus as defined in claim 2 wherein: said connecting means comprises a protruding tongue said cooperating means comprises a groove into which said tongue is to matingly cooperate.
Claim 7
Dependent Claim
51 words
The blood access apparatus as defined in claim 2 and further including: a locking means connected between said switching body portion and said needle body portion, whereby upon said needle body portion being mounted within said channel of said switching body portion said locking means functions to prevent accidental disengagement therebetween.
Claim 8
Dependent Claim
65 words
The blood access apparatus as defined in claim 2 wherein: said needle body portion being attached to a switching body portion; mechanism movement means mounted within said switching body portion, said mechanism movement means connected to said switching means and also connected to activation means, upon said activation means receiving appropriate input impulses said mechanism movement means is moved to thereby move said switching means.
Claim 9
Dependent Claim
95 words
Blood access apparatus as defined in claim 6 wherein: said mechanism movement means being movable between a first position and a second position, with said mechanism movement means in said first position said opening within said needle has access with one of said pair of holes and with said mechanism movement means in said second position said opening within said needle having access to the other of said pair of holes, a biasing means connected to said mechanism movement means, said biasing means functions to continuously bias said mechanism movement means to said first position.
References Cited (Backward Citations)
US2261213A
Cited
US2835252A
Cited
US3048192A
Cited
US3091239A
Cited
US3057370A
Cited
US3434691A
Cited
US3626938A
Cited
US3799702A
Cited
US3756234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |