US4581538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation shield
Assignee: COLONIAL X-RAY Corp A CORP OF FL
•
Filing: 1983-09-30
•
Granted: 1986-04-08
•
Expires: 2003-09-30
Abstract
Abstract A shield for protecting a person from radiation being used to irradiate a work area, while permitting the person to observe and to have access to the work area, including a radiation-shielding observation window, and a flexible, mechanically penetrable radiation-shielding curtain adjacent the window.
Inventors
- 👤 Mark J. Lenhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:27
CPC Classifications
G; G21; G21F; G21F3/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
176 words
A shield for protecting personnel from radiation being used to irradiate a work area while permitting observation and access to the work area, said shield comprising: a supporting frame; a connector for connecting said frame to an overhead suspension system for supporting said shield above said work area; a radiation-shielding observation window connected to and extending below said frame said window sized and shaped to enclose the space between the source of said radiation and said work area on least three sides; a radiation-shielding curtain suspended at one end adjacent and below said window about at least said three sides, said curtain comprising a plurality of overlapping flexible radiation shielding flaps adapted for mechanical penetration and adapted to conform to the contour of the work area; and said shield having height above at least said three sides such that with said curtain at the surface of said work area, said window extends at least as high as the point at which radiation emanates from said source and above the height of personnel outside said enclosed space.
Claim 2
Dependent Claim
176 words
A shield for protecting personnel from radiation being used to irradiate a work area while permitting observation and access to the work area, said shield comprising: a supporting frame; a connector for connecting said frame to an overhead suspension system for supporting said shield above said work area; a radiation-shielding observation window connected to and extending below said frame said window sized and shaped to enclose the space between the source of said radiation and said work area on least three sides; a radiation-shielding curtain suspended at one end adjacent and below said window about at least said three sides, said curtain comprising a plurality of overlapping flexible radiation shielding flaps adapted for mechanical penetration and adapted to conform to the contour of the work area; and said shield having height above at least said three sides such that with said curtain at the surface of said work area, said window extends at least as high as the point at which radiation emanates from said source and above the height of personnel outside said enclosed space.
Claim 3
Dependent Claim
24 words
The shield of claim 1 sized and shaped to permit at least two people simultaneously to observe and have access to the work area.
Claim 4
Dependent Claim
12 words
The shield of claim 2 wherein said window and curtain are U-shaped.
Claim 5
Dependent Claim
16 words
The shield of claim 3 wherein said window comprises a lead-impregnated, transparent acrylic copolymer resin sheet.
Claim 6
Dependent Claim
15 words
The shield of claim 4 wherein said sheet has a lead equivalency of 0.50 millimeters.
Claim 7
Dependent Claim
30 words
The shield of claim 1 wherein said supporting frame further comprises a handle for controlling the position of said shield, said handle being accessible from any location about said shield.
Claim 8
Dependent Claim
25 words
The shield of claim 1 wherein said connector comprises means for enabling said shield to have any selected orientation with respect to said work area.
Claim 9
Dependent Claim
16 words
The shield of claim 1 wherein said window comprises a lead-impregnated, transparent acrylic copolymer resin sheet.
Claim 10
Dependent Claim
15 words
The shield of claim 1 wherein said sheet has a lead equivalency of 0.50 millimeters.
Claim 11
Dependent Claim
24 words
The shield of claim 1 wherein said curtain comprises a double layer of lead-vinyl sheeting, each layer having a lead equivalency of 0.50 millimeters.
References Cited (Backward Citations)
US1607140A
Cited
US1907523A
Cited
FR1164093A
Cited
US3488495A
Cited
DE2313201A1
Cited
US3980889A
Cited
US3984695A
Cited
US3967129A
Cited
US4156146A
Cited
US4062518A
Cited
US4254341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-07 | 1989-10-07 | 1990-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-07 | 1993-10-07 | 1994-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-07 | 1997-10-07 | 1998-04-08 | $7700.00 | Window Closed / Lapsed |