Patent US4245566A successfully refreshed from Google Patents.
US4245566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety shield for vacuum/pressure chamber viewing port
Assignee: National Aeronautics and Space Administration
•
Filing: 1979-06-29
•
Granted: 1981-01-20
•
Expires: 1999-06-29
Abstract
Abstract A safety shield for protecting observers from flying debris resulting from a failure of a vacuum or pressure chamber viewing port following an implosion or explosion includes an optically clear shatter-resistant safety shield member spaced apart from the viewing port on the outer surface of the chamber.
Inventors
- 👤 Richard A. Shimansky
- 👤 Rodney S. Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:43
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/007; B; B01; B01J; B01J3/00; B01J3/004; E; E06; E06B; E06B5/00; E06B5/10; E06B5/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
133 words
A safety shield for a vacuum/pressure chamber viewing port, comprising: an optically clear safety shield member; a plurality of threaded rods extending through said optically clear safety shield member and said vacuum/pressure chamber so that said optically clear safety shield member is axially aligned with said viewing port; a first pair of nuts threaded on each of said threaded rods, said nuts bearing against opposite sides of said vacuum/pressure chamber for securing said threaded rods to said vacuum/pressure chamber; and a second pair of nuts threaded on each of said threaded rods, said second pair of nuts bearing against opposite sides of said optically clear safety shield member, and said second pair of nuts being adjustable along said threaded rods to adjustably space said optically clear safety shield member from said viewing port.
Claim 2
Dependent Claim
133 words
A safety shield for a vacuum/pressure chamber viewing port, comprising: an optically clear safety shield member; a plurality of threaded rods extending through said optically clear safety shield member and said vacuum/pressure chamber so that said optically clear safety shield member is axially aligned with said viewing port; a first pair of nuts threaded on each of said threaded rods, said nuts bearing against opposite sides of said vacuum/pressure chamber for securing said threaded rods to said vacuum/pressure chamber; and a second pair of nuts threaded on each of said threaded rods, said second pair of nuts bearing against opposite sides of said optically clear safety shield member, and said second pair of nuts being adjustable along said threaded rods to adjustably space said optically clear safety shield member from said viewing port.
Claim 3
Dependent Claim
30 words
The safety shield of claim 1 wherein said shield member is formed from an optically clear, shatter-resistant material and has a shape corresponding to the shape of said viewing port.
Claim 4
Dependent Claim
16 words
The safety shield of claim 2 wherein said shield member is formed from a methacrylate resin.
Claim 5
Dependent Claim
16 words
The safety shield of claim 1 wherein said shield member is larger than said viewing port.
Claim 6
Dependent Claim
21 words
The safety shield of claim 3 wherein said shield member is of sufficient thickness to contain said viewing port explosion fragments.
Claim 7
Dependent Claim
23 words
The safety shield of claim 5 wherein said shield member is formed from a plate having a thickness of at least 1/2 inch.
References Cited (Backward Citations)
US2736231A
Cited
US1407975A
Cited
US1521393A
Cited
US1686942A
Cited
FR839017A
Cited
FR1088131A
Cited
US3393485A
Cited
US3369836A
Cited
US4006973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-20 | 1984-07-21 | 1985-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-20 | 1988-07-21 | 1989-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-20 | 1992-07-21 | 1993-01-20 | $7700.00 | Window Closed / Lapsed |