US3890955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum indicator
Assignee: Individual
•
Filing: 1974-01-15
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Granted: 1975-06-24
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Expires: 1994-01-15
Abstract
Abstract An apparatus for withdrawing blood from a body vessel of the type including a tube with a partial vacuum pressure therein sealed at an open end by a flexible stopper, a needle having a sharp end for penetrating a vessel, an interior blood carrying cavity, an opposite sharp end, and a sleeve attachable to the needle so that the opposite end of the needle extends into the sleeve and adapted for receiving the stopper so that, when the one needle end penetrates the vessel, the stopper moves within the sleeve toward the opposite needle end which punctures the stopper and causes the blood to be drawn through the interior of the needle into the tube. In order to avoid unnecessary damage to blood vessels from attempts to withdraw blood with tubes which have lost their partial vacuum pressure, a quantity of material such as hemoglobin having a color which varies with the pressure about it is disposed within the tube before it is evacuated. The material can be dry and painted on the tube walls or liquid. Other indicators include cytochrome, myoglobin, heme and leucobases. In a further embodiment, two objects which have different air resistances, so that in full or partial pressure they fall under the influence of gravity, are disposed within the tube.
Inventors
- 👤 John Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:18
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/15; A61B5/150007; A61B5/150015; A61B5/15003; A61B5/150351; A61B5/150374; A61B5/150381; A61B5/150389; A61B5/150473; A61B5/150496; A61B5/150732; A61B5/150885; A61B5/150893; A61B5/153; A61B5/154; A61M; A61M1/00; A61M1/64; A61M1/66
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
139 words
An apparatus for removing blood having a tube with at least partial vacuum pressure therein below atmospheric pressure and a needle connected to said tube with an end adapted for penetrating into a blood carrying body vessel and an interior blood transferring cavity so that, when said end has penetrated into a vessel, said cavity is in pneumatic connection with the interior of said tube and blood from that vessel is drawn through said cavity into the interior of said tube, the improvement comprising a quantity of hemoglobin painted on a portion of said tube, which has a color which varies as a function of the amount of oxygen about it, said material being within said tube for indicating by a change in color, a change in the amount of oxygen and the loss of said partial vacuum pressure.
Claim 2
Independent Claim
139 words
An apparatus for removing blood having a tube with at least partial vacuum pressure therein below atmospheric pressure and a needle connected to said tube with an end adapted for penetrating into a blood carrying body vessel and an interior blood transferring cavity so that, when said end has penetrated into a vessel, said cavity is in pneumatic connection with the interior of said tube and blood from that vessel is drawn through said cavity into the interior of said tube, the improvement comprising a quantity of hemoglobin painted on a portion of said tube, which has a color which varies as a function of the amount of oxygen about it, said material being within said tube for indicating by a change in color, a change in the amount of oxygen and the loss of said partial vacuum pressure.
Claim 3
Dependent Claim
101 words
An apparatus as in claim 1, wherein said apparatus further includes fleXible means sealing an open end of said tube and a sleeve member with said needle attached to one end and receiving said flexible means at the other end and wherein said needle has an end, opposite said end adapted for penetrating said vessel, for puncturing said flexible means when a force is exerted on said tube to cause said penetrating end of said needle to penetrate said vessel and said puncturing end to puncture said flexible means as said sealing means moves toward said needle within said sleeve member.
Claim 4
Dependent Claim
11 words
An apparatus as in claim 1, wherein said tube is transparent.
Claim 5
Dependent Claim
74 words
A combination of an enclosed vessel having at least a partial vacuum below atmospheric pressure therein and a quantity of dry hemoglobin, which has a color which varies as a function of the amount of oxygen about it, said material being within said vessel and visible from the exterior thereof for indicating by a change in color a change in the amount of oxygen and accordingly a change in the pressure within said vessel.
Claim 6
Dependent Claim
74 words
A combination of an enclosed vessel having at least a partial vacuum below atmospheric pressure therein and a quantity of dry hemoglobin, which has a color which varies as a function of the amount of oxygen about it, said material being within said vessel and visible from the exterior thereof for indicating by a change in color a change in the amount of oxygen and accordingly a change in the pressure within said vessel.
Claim 7
Independent Claim
74 words
A method of producing a vessel with at least a partial vacuum pressure below atmospheric pressure therein comprising the steps of: placing within said vessel a quantity of material which has a color which varies with the amount of oxygen about said material and accordingly the pressure about said material including painting a lacquer of hemoglobin on a portion of the walls of said vessel; and evacuating said vessel to said partial vacuum pressure.
Claim 8
Independent Claim
74 words
A method of producing a vessel with at least a partial vacuum pressure below atmospheric pressure therein comprising the steps of: placing within said vessel a quantity of material which has a color which varies with the amount of oxygen about said material and accordingly the pressure about said material including painting a lacquer of hemoglobin on a portion of the walls of said vessel; and evacuating said vessel to said partial vacuum pressure.
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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) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |