Patent US3973554A successfully refreshed from Google Patents.
US3973554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation safety shield for a syringe
Assignee: United States Department of Health and Human Services
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Filing: 1975-04-24
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Granted: 1976-08-10
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Expires: 1995-04-24
Abstract
Abstract A safety apparatus for use in administering radioactive serums by a syringe, without endangering the health and safety of the medical operators, consists of a sheath and a shield which can be retracted into the sheath to assay the radioactive serum in an assay well. The shield can be moved from the retracted position into an extended position when the serum is to be injected into the patient. To protect the operator, the shield can be constructed of tantalum or any like high density substance to attenuate the radiation, emanating from the radioactive serums contained in the syringe, from passing to the atmosphere. A lead glass window is provided so that the operator can determine the exact quantity of the radioactive serum which is contained in the syringe.
Inventors
- 👤 Harold W. Tipton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:59
CPC Classifications
G; G21; G21F; G21F5/00; G21F5/015; G21F5/018; A; A61; A61M; A61M5/00; A61M5/178; A61M5/1785
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
146 words
A radiation safety apparatus for use with a syringe for containing a radioactive liquid, comprising: a cylindrical sheath for encircling the distal end of a syringe; a retractable cylindrical shield for encircling the proximal end of the syringe and constructed of a material capable of attenuating significant amounts of radiation from a radioactive source, said shield being coaxial with said sheath and being capable of retracting into said sheath; and means to couple said shield and said sheath coaxially together and to permit said shield to telescope into said sheath while being frictionally maintained in axial position relative to said sheath; wherein said shield is extensible over the proximal end of the syringe to ensure that radioactive rays do not escape when the syringe contains a radioactive serum, but whereby said shield can be retracted within said sheath to allow for assaying of a radioactive substance.
Claim 2
Dependent Claim
146 words
A radiation safety apparatus for use with a syringe for containing a radioactive liquid, comprising: a cylindrical sheath for encircling the distal end of a syringe; a retractable cylindrical shield for encircling the proximal end of the syringe and constructed of a material capable of attenuating significant amounts of radiation from a radioactive source, said shield being coaxial with said sheath and being capable of retracting into said sheath; and means to couple said shield and said sheath coaxially together and to permit said shield to telescope into said sheath while being frictionally maintained in axial position relative to said sheath; wherein said shield is extensible over the proximal end of the syringe to ensure that radioactive rays do not escape when the syringe contains a radioactive serum, but whereby said shield can be retracted within said sheath to allow for assaying of a radioactive substance.
Claim 3
Dependent Claim
27 words
A radiation safety apparatus according to claim 1, further including a locking means for locking said shield in a retracted position when the radioactive substance is assayed.
Claim 4
Dependent Claim
18 words
A radiation safety shield according to claim 2, wherein said locking mechanism includes a ball and compression spring.
Claim 5
Dependent Claim
58 words
A radiation safety shield according to claim 1 wherein said means to couple said shield and sheath comprises a pair of guideways in said sheath, a pair of plugs extending from said shield each passing through one of said guideways, and a slidable member mounted on each plug in slidable relation with the outer surface of said sheath.
Claim 6
Dependent Claim
33 words
A radiation safety apparatus according to claim 1, further including a lead glass window in said shield in order to be able to ascertain the amount of radioactive substance contained in the syringe.
Claim 7
Dependent Claim
17 words
A radiation safety apparatus according to claim 1 wherein said shield is constructed of tantalum or lead.
Claim 8
Dependent Claim
173 words
A radiation safety apparatus for use with a syringe comprising: a cylindrical sheath for encircling the distal end of a syringe; a retractable cylindrical shield for encircling the proximal end of the syringe and constructed of a material capable of attenuating significant amounts of radiation from a radioactive source, said shield being coaxial with and being slidably connected to said sheath to allow said shield to be retracted into said sheath; locking means for locking said shield in a retracted position when the radioactive substance is assayed, said locking means comprising a pair of guideways in said sheath, a pair of plugs extending from said sheath each passing through one of said guideways, and a slidable member mounted on each plug in slidable relation with the outer surface of said sheath; wherein when a radioactive serum is drawn into the syringe, the radioactive rays are shielded by said shield and do not pass through the atmosphere, but said shield can be retracted within said sheath to allow for assaying of the radioactive substance.
Claim 9
Dependent Claim
173 words
A radiation safety apparatus for use with a syringe comprising: a cylindrical sheath for encircling the distal end of a syringe; a retractable cylindrical shield for encircling the proximal end of the syringe and constructed of a material capable of attenuating significant amounts of radiation from a radioactive source, said shield being coaxial with and being slidably connected to said sheath to allow said shield to be retracted into said sheath; locking means for locking said shield in a retracted position when the radioactive substance is assayed, said locking means comprising a pair of guideways in said sheath, a pair of plugs extending from said sheath each passing through one of said guideways, and a slidable member mounted on each plug in slidable relation with the outer surface of said sheath; wherein when a radioactive serum is drawn into the syringe, the radioactive rays are shielded by said shield and do not pass through the atmosphere, but said shield can be retracted within said sheath to allow for assaying of the radioactive substance.
Claim 10
Independent Claim
107 words
A method for assaying radioactive serums in a syringe before injecting serum into a patient comprising the steps of: inserting a syringe into a radiation safety apparatus having a shield and sheath with said shield covering the proximal end of the syringe; drawing the serum into the syringe; lowering said syringe into an assay well and retracting said shield into said sheath so that said shield no longer covers the proximal end of the syringe; assaying said serum in the assay well; extending said shield over the proximal end of the syringe and withdrawing the syringe from the assay well; and injecting said serum into the patient.
Claim 11
Independent Claim
107 words
A method for assaying radioactive serums in a syringe before injecting serum into a patient comprising the steps of: inserting a syringe into a radiation safety apparatus having a shield and sheath with said shield covering the proximal end of the syringe; drawing the serum into the syringe; lowering said syringe into an assay well and retracting said shield into said sheath so that said shield no longer covers the proximal end of the syringe; assaying said serum in the assay well; extending said shield over the proximal end of the syringe and withdrawing the syringe from the assay well; and injecting said serum into the patient.
References Cited (Backward Citations)
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US3673411A
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US3769490A
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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) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |