US3820541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shield for hypodermic syringe
Assignee: Individual
•
Filing: 1972-09-11
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Granted: 1974-06-28
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Expires: 1992-09-11
Abstract
Abstract A shield for a hypodermic syringe adapted to surround the barrel thereof to protect the user against radiation emanating from radioactive fluids contained therein. The shield is lead-lined, and is provided with a bayonet fitting element engaging the manually engaged end of the syringe. A coil spring cooperates with the bayonet fitting element to prevent wobbling between the barrel of the syringe and the barrel of the shield. The barrel of the shield is so configured that a small end of the barrel of the syringe is uncovered to permit visual inspection of flow to and from the syringe.
Inventors
- 👤 J Langan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:28
CPC Classifications
G; G21; G21F; G21F5/00; G21F5/015; G21F5/018; A; A61; A61M; A61M5/00; A61M5/178; A61M5/1785
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
141 words
A shield for a hypodermic syringe for protecting the user against the radiation of radioactive fluids contained in the barrel of the syringe comprising: a main barrel element including an outer cylindrical sleeve of relatively rigid material and defining a cylindrical bore, a sleeve of radiation shielding material supported upon an inner surface of said outer sleeve, and substantially co-extensive therewith, a bayonet fitting element of tubular configuration, one end thereof being fitted upon an end of said main barrel element, and forming a pair of bayonet lugs extending from a second end thereof, said bayonet fitting element defining a cylindrical recess coaxial with the principal axis of said main barrel element, and a coil spring disposed within said recess engaging said end of said main barrel element and having an axially oriented line of action cooperating with said bayonet lugs.
Claim 2
Dependent Claim
141 words
A shield for a hypodermic syringe for protecting the user against the radiation of radioactive fluids contained in the barrel of the syringe comprising: a main barrel element including an outer cylindrical sleeve of relatively rigid material and defining a cylindrical bore, a sleeve of radiation shielding material supported upon an inner surface of said outer sleeve, and substantially co-extensive therewith, a bayonet fitting element of tubular configuration, one end thereof being fitted upon an end of said main barrel element, and forming a pair of bayonet lugs extending from a second end thereof, said bayonet fitting element defining a cylindrical recess coaxial with the principal axis of said main barrel element, and a coil spring disposed within said recess engaging said end of said main barrel element and having an axially oriented line of action cooperating with said bayonet lugs.
Claim 3
Dependent Claim
33 words
Structure in accordance with claim 1 in combination with a hypodermic syringe barrel having a pair of lAterally extending projections on one end thereof, said projections compressing said spring and engaging said lugs.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |