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US 11,324,633 B2Granted
Welding helmet having a filter arrangement
Assignee3M Innovative Properties Company
InventorsKristina M. Magnusson, Kenneth Jarefors
Life of this patent
Estimating the term…
Abstract
A welding helmet having a filter arrangement is disclosed. The welding helmet is provided with a main filter and at least one auxiliary filter separate from and positioned next to the main filter. The at least one auxiliary filter comprises an electro-optic element adapted to attenuate the transmission of optical radiation incident on the auxiliary filter.
Claims18
A welding helmet having a filter arrangement comprising:
- a face shield pivotably connected to a head harness fitted internally to the face shield and configured to be secured on a user's head, wherein the face shield is configured to be raised out of view of the user when not in use, and lowered to a working position when the user is to perform a welding operation, wherein the face shield comprises a main central aperture centrally disposed in the face shield at eye level of the user when in the working position, a first side aperture disposed adjacent to and separate from the main central aperture at a first side, and a second side aperture disposed adjacent to and separate from the main central aperture on an opposite second side of the main central aperture;
- a main filter, positioned in the first aperture, comprising a first electro-optic element adapted to attenuate transmission of optical radiation incident on the main filter, wherein, in the working position, the main filter is configured to be disposed in front of the user's eyes in a direct line of vision of the user;
- and
- a first auxiliary filter separate from the main filter and disposed in the first side aperture, and a second auxiliary filter separate from the main filter and disposed in the second side aperture;
- wherein the first auxiliary filter comprises a second electro-optic element adapted to attenuate transmission of optical radiation incident on the first auxiliary filter, and
- wherein at least the first auxiliary filter is switchable between a light state and a dark state either in coordination with the main filter or independently from the main filter.
3 more elements
A welding helmet, comprising:
- a head harness configured to be secured on a user's head;
- a first face shield configured to cover at least a substantial portion of a user's head and face pivotably connected to the head harness and configured to be placed in front of the user's face when placed in a working position;
- a second face shield movably attached to the first face shield, wherein at least one of the first and second face shields includes a main central aperture centrally disposed in the face shield at eye level of the user when positioned in the working position, a first side aperture disposed adjacent to the main central aperture at a first side, and a second side aperture disposed adjacent to the main central aperture on an opposite second side of the main central aperture;
- a main filter positioned in the main central aperture, the main filter comprising a first electro-optic element adapted to attenuate transmission of optical radiation incident on the main filter;
- a first auxiliary filter separate from the main filter and disposed in the first side aperture;
- and
- a second auxiliary filter separate from the main filter and disposed in the second side aperture,
- wherein the first auxiliary filter comprises a second electro-optic element adapted to attenuate transmission of optical radiation incident on the first auxiliary filter, and
- wherein the first auxiliary filter is adapted to be switched between a light state and a dark state either in coordination with the main filter or independently from the main filter.
6 more elements
Dependencies are inferred from the claim text.