Patent US3967129A successfully refreshed from Google Patents.
US3967129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation shielding curtain
Assignee: Research Corp
•
Filing: 1975-04-28
•
Granted: 1976-06-29
•
Expires: 1995-04-28
Abstract
Abstract A radiation shield in the form of a stranded curtain made up of bead-chains whose material and geometry are selected to produce a cross-sectional density that is the equivalent of 0.25 mm or more of lead and which curtain may be mounted on various radiological devices to shield against scattered radiation while offering a minimum of obstruction to the radiologist.
Inventors
- 👤 Norlin T. Winkler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:42
CPC Classifications
G; G21; G21F; G21F3/00; A; A61; A61B; A61B6/00; A61B6/10; A61B6/107; G21F1/00; G21F1/02; G21F1/08; G21F1/085; A61B6/44; A61B6/4423; A61B6/58; A61B6/582; A61B6/583
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
75 words
A method of constructing a radiation shield comprising the steps of: assembling a plurality of radiation-shielding elements; connecting said elements in sets to form a plurality of elongated strings of said elements; disposing the upper ends of said strings adjacent to each other to form a stranded curtain; and selecting the material and geometry of said elements such that said curtain has a cross-section density which is the equivalent of a predetermined thickness of lead.
Claim 2
Independent Claim
75 words
A method of constructing a radiation shield comprising the steps of: assembling a plurality of radiation-shielding elements; connecting said elements in sets to form a plurality of elongated strings of said elements; disposing the upper ends of said strings adjacent to each other to form a stranded curtain; and selecting the material and geometry of said elements such that said curtain has a cross-section density which is the equivalent of a predetermined thickness of lead.
Claim 3
Dependent Claim
21 words
A method as in claim 1 wherein said upper ends are disposed in two parallel rows to form a double-layer curtain.
Claim 4
Dependent Claim
36 words
A method as in claim 2 wherein said elongated strings of said elements comprise strands of bead chain and the beads in one layer of said curtain are disposed opposite the interstices in the adjoining layer.
Claim 5
Dependent Claim
17 words
A method as in claim 1 wherein said predetermined thickness of lead is at least 0.25 mm.
Claim 6
Dependent Claim
20 words
A method as in claim 1 wherein the material and geometry of said radiation shielding elements comprise spherical metal beads.
Claim 7
Dependent Claim
47 words
A radiation shield comprising: a plurality of flexible strings of radiation-shielding material; and means for holding the upper ends of said strings adjacent to each other to form a flexible stranded curtain having a cross-sectional density which is the equivalent of at least 0.25 mm of lead.
Claim 8
Dependent Claim
47 words
A radiation shield comprising: a plurality of flexible strings of radiation-shielding material; and means for holding the upper ends of said strings adjacent to each other to form a flexible stranded curtain having a cross-sectional density which is the equivalent of at least 0.25 mm of lead.
Claim 9
Dependent Claim
31 words
A shield as in claim 6 wherein each of said strings comprises: a plurality of radiation-shielding elements; and means for connecting said elements in a set to form a flexible chain.
Claim 10
Dependent Claim
39 words
A shield as in claim 7 wherein said holding means comprises a first tubular means for accommodating at least one of said radiation-shielding elements and having a longitudinal slot therein for accommodating at least one of said connecting means.
Claim 11
Dependent Claim
45 words
A shield as in claim 8 wherein said holding means further comprises a second tubular means for accommodating at least one of said radiation-shielding elements and disposed adjacent to said first tubular means such that the chains held by each form a double-layer stranded curtain.
Claim 12
Dependent Claim
44 words
A shield as in claim 9 wherein said holding means further comprises means for offsetting said first tubular means from said second tubular means such that the radiation-shielding elements in said first bead chain are disposed opposite the interstices in said second bead chain.
Claim 13
Dependent Claim
13 words
A shield as in claim 6 wherein said radiation-shielding elements comprise spherical beads.
Claim 14
Dependent Claim
18 words
A shield as in claim 6 wherein said flexible strings comprise 0.25 inch, short-centered, nickel-plated brass bead chain.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |