US4707860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding shield
Assignee: Individual
•
Filing: 1984-11-21
•
Granted: 1987-11-24
•
Expires: 2004-11-21
Abstract
Abstract Welding shield adapted to be positioned in front of the face of the welder for protection radiation. Said shield comprises a transparent dark welding glass (17) which is arranged as a locally limited portion to be positioned in front of the eyes. Around this welding glass there is provided a transparent portion which is highly light-reflecting and UV-absorbing and comprises a planar panel (13) with the welding glass attached to it.
Inventors
- 👤 Per-Olof Holmstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:53
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/04; A61F9/06; A61F9/065
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
88 words
Welding shield adapted to be located in front of the face of the welder for protection against harmful radiation, comprising a dark welding glass, a highly light-reflecting layer and a UV-absorbing layer together forming a transparent planar panel which extends beyond the top, bottom and side edges of the welding glass, and means mounting the welding glass to the backside surface of said panel, said welding glass forming a locally defined portion of the welding shield to be positioned in front of the eyes, surrounded by said panel.
Claim 2
Dependent Claim
88 words
Welding shield adapted to be located in front of the face of the welder for protection against harmful radiation, comprising a dark welding glass, a highly light-reflecting layer and a UV-absorbing layer together forming a transparent planar panel which extends beyond the top, bottom and side edges of the welding glass, and means mounting the welding glass to the backside surface of said panel, said welding glass forming a locally defined portion of the welding shield to be positioned in front of the eyes, surrounded by said panel.
Claim 3
Dependent Claim
20 words
Welding shield as claimed in claim 1 wherein said highly light-reflecting layer is innermost and a UV-absorbing layer is outermost.
Claim 4
Dependent Claim
17 words
Welding shield as claimed in claim 2 wherein the light-reflecting layer comprises a layer of bright silver.
Claim 5
Dependent Claim
23 words
Welding shield as claimed in claim 1 wherein the planar transparent panel is provided with a further coloured layer on the inside thereof.
Claim 6
Dependent Claim
13 words
Welding shield as claimed in claim 4 wherein the layer comprises a foil.
Claim 7
Dependent Claim
22 words
Welding shield as claimed in claim 1 wherein the welding glass is attached to the inner side of the planar transparent panel.
Claim 8
Dependent Claim
16 words
Welding shield as claimed in claim 1 arranged as the front wall of a head shield.
Claim 9
Dependent Claim
20 words
Welding shield as claimed in claim 1 including transparent highly reflective and UV-absorbing side portions which adjoin the front wall.
References Cited (Backward Citations)
US3112490A
Cited
US3231896A
Cited
US3521629A
Cited
US3756692A
Cited
US3868727A
Cited
US4155122A
Cited
SU652943A2
Cited
CA1121192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-23 | 1991-05-25 | 1991-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-23 | 1995-05-25 | 1995-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-23 | 1999-05-25 | 1999-11-24 | $7700.00 | Window Closed / Lapsed |