Patent US4649571A successfully refreshed from Google Patents.
US4649571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual vision welding helmet
Assignee: Individual
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Filing: 1984-11-16
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Granted: 1987-03-17
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Expires: 2004-11-16
Abstract
Abstract A welding helmet is fitted with two lenses, one tinted and one relatively clear. The tinted lens is mounted forward of the eyes of the viewer and the clear lens extends obliquely away from the tinted lens towards the face of the wearer. To view the workpiece through the clear lens a wearer need only tilt the helmet without the necessity of raising his hands.
Inventors
- 👤 Raymond C. Falkiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:27
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/04; A61F9/06; A61F9/064
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
161 words
A welding mask adapted to be worn by a wearer, comprising a face protecting mask which shields the entire face, having first and second viewing windows, the first of said windows incorporating a tinted lens adapted for viewing under welding conditions and said second window incorporating a relatively transparent lens adapted for viewing work to be welded prior to striking an arc or lighting a torch, wherein said tinted lens is mounted forward of the face of the wearer and said relatively transparent lens extends at an angle rearwardly towards the wearer away from the plane of the tinted lens and at an acute angle to the normal line of vision of the wearer through said tinted lens, said angle being sufficient to substantially reduce the amount of light entering into the mask through said second viewing window when the wearer is viewing a light source, located at arm's length along the normal line of vision through said first viewing window.
Claim 2
Dependent Claim
161 words
A welding mask adapted to be worn by a wearer, comprising a face protecting mask which shields the entire face, having first and second viewing windows, the first of said windows incorporating a tinted lens adapted for viewing under welding conditions and said second window incorporating a relatively transparent lens adapted for viewing work to be welded prior to striking an arc or lighting a torch, wherein said tinted lens is mounted forward of the face of the wearer and said relatively transparent lens extends at an angle rearwardly towards the wearer away from the plane of the tinted lens and at an acute angle to the normal line of vision of the wearer through said tinted lens, said angle being sufficient to substantially reduce the amount of light entering into the mask through said second viewing window when the wearer is viewing a light source, located at arm's length along the normal line of vision through said first viewing window.
Claim 3
Dependent Claim
31 words
A welding mask as in claim 1 wherein the tinted lens is mounted in a plane which is approximately perpendicular to the normal line of vision through the said tinted lens.
Claim 4
Dependent Claim
35 words
A welding mask as in claim 2 wherein the relatively transparent lens extends rearwardly towards the face of the wearer away from the vicinity of a bordering edge of the window incorporating said tinted lens.
Claim 5
Dependent Claim
50 words
A welding mask as in claim 3 wherein the forward edge of the relatively transparent lens is sufficiently proximate to the edge of the tinted lens to provide a field of vision through said relatively transparent lens which is virtually contiguous to the field of vision through the tinted lens.
Claim 6
Dependent Claim
39 words
A welding mask as in claims 2, 3 or 4 wherein the included angle between the planes of said tinted lens and said relatively clear lens opening in the direction towards said wearer is in the range of 115°-120°.
Claim 7
Dependent Claim
40 words
A welding mask as in claim 1 wherein the relatively transparent lens has an inner edge which terminates along a line proximate to the limit of the field of vision of a wearer whose eyes are downwardly or laterally inclined.
Claim 8
Dependent Claim
54 words
A welding mask as in claim 1 wherein partial mirroring means is incorporated in or adjacent to said relatively transparent lens so as to enhance the reflection of light approaching said lens from the exterior of said mask, while permitting viewing through said lens from the interior of said mask under normal lighting conditions.
Claim 9
Dependent Claim
22 words
A welding mask as in claims 4, 6 or 7 in which said relatively transparent lens is mounted beneath said tinted lens.
Claim 10
Dependent Claim
129 words
A welding mask as in claims 4, 6 or 7 adapted for viewing work to be welded, prior to striking an arc, or lighting a torch, in which one or more additional relatively transparent lenses are mounted adjacent to the bordering edges of the window incorporating said tinted lens, wherein said additional lenses are all angled rearwardly away from the plane of the tinted lens and towards the wearer at an acute angle to the normal line of vision of the wearer through said tinted lens, said angle being sufficient to substantially reduce the amount of light entering into said mask through said second viewing window when the wearer is viewing a light source, located at arm's length along the normal line of vision through said first viewing window.
Claim 11
Dependent Claim
45 words
A welding mask as in claim 1 wherein said tinted lens and said relatively transparent lens provide part of the boundaries of an enlarged interior region within said mask between the eyes of a wearer and said lens, whereby air may circulate within said region.
Claim 12
Dependent Claim
39 words
A welding mask as in claims 6, 7 or 10 wherein the included angle between the plates of said tinted lens and said relatively clear lens opening in the direction towards said wearer is in the range of 115°-120°.
Claim 13
Dependent Claim
24 words
A welding mask as in claim 10 wherein air circulation vents are provided which permit the circulation of outside air within said interior region.
Claim 14
Dependent Claim
43 words
A welding mask as in claim 10 incorporating a form fitting lining adapted to lie sealingly against the cheeks and nose of the wearer and reduce the tendancy for exhaled breath of the wearer to enter the enlarged interior region within said mask.
Claim 15
Dependent Claim
22 words
A welding mask as in claims 10, 12 or 13 in which said relatively transparent lens is mounted beneath said tinted lens.
Claim 16
Dependent Claim
129 words
A welding mask as in claims 10, 12 or 13 adapted for viewing work to be welded, prior to striking an arc or lighting a torch, in which one or more additional relatively transparent lenses are mounted adjacent to the bordering edges of the window incorporating said tinted lens, wherein said additional lenses are all angled rearwardly away from the plane of the tinted lens and towards the wearer at an acute angle to the normal line of vision of the wearer through said tinted lens, said angle being sufficient to substantially reduce the amount of light entering into said mask through said second viewing window when the wearer is viewing a light source, located at arm's length along the normal line of vision, through said first viewing window.
Claim 17
Dependent Claim
38 words
A welding mask as in claims 12 or 13 wherein the included angle between the planes of said tinted lens and said relatively clear lens opening in the direction towards said wearer is in the range of 115°-120°.
Claim 18
Dependent Claim
22 words
A welding mask as in claims 1, 2 or 3 in which said relatively transparent lens is mounted beneath said tinted lens.
Claim 19
Dependent Claim
129 words
A welding mask as in claim 1, 2 or 3 in which one or more additional relatively transparent lenses adapted for viewing work to be welded, prior to striking an arc, or lighting a torch are mounted adjacent to the bordering edges of the window incorporating said tinted lens, wherein said additional lenses are all angled rearwardly away from the plane of the tinted lens and towards the wearer at an acute angle to the normal line of vision of the wearer through said tinted lens, said angle being sufficient to substantially reduce the amount of light entering into said mask through said second viewing window when the wearer is viewing a light source, located at arm's length along the normal line of vision through said first viewing window.
References Cited (Backward Citations)
US1320931A
Cited
US1386989A
Cited
US1685725A
Cited
CH203546A
Cited
US2187542A
Cited
US2362637A
Cited
US2556433A
Cited
US2545078A
Cited
US2644160A
Cited
US2818859A
Cited
US3141172A
Cited
US3444561A
Cited
US3689136A
Cited
DE2514439A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-16 | 1990-09-15 | 1991-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-16 | 1994-09-15 | 1995-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-16 | 1998-09-15 | 1999-03-17 | $7700.00 | Window Closed / Lapsed |