Patents by Inventor Thomas B. Stenvall

Thomas B. Stenvall has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11376162
    Abstract: An automatic darkening filter assembly for a welding protector and a welding protector that includes the automatic darkening filter assembly. The automatic darkening filter assembly has a housing that forms an opening in which a switchable light filter is arranged. The switchable light filter is retained by a first and a second resilient gasket that are arranged on opposite sides of the switchable light filter and which each extend circumferentially adjacent a periphery of the switchable light filter. The invention helps maximizing the robustness of the welding protector and facilitates assembly.
    Type: Grant
    Filed: March 19, 2021
    Date of Patent: July 5, 2022
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Johan M. P. Hansson, Kjell A. Hummel, Thomas B. Stenvall, Linus P. Bastman
  • Patent number: 11324275
    Abstract: A welding helmet (1) with a head suspension system, a protective shield (2) and a movable visor (3). The protective shield forms a see-through window. The welding helmet further has a first neck shield (6). The protective shield forms a lower end at which the first neck shield is removably attachable.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: May 10, 2022
    Assignee: 3M Innovative Properties Company
    Inventors: Martin Berggren, Thomas B. Stenvall
  • Publication number: 20210205136
    Abstract: An automatic darkening filter assembly for a welding protector and a welding protector that includes the automatic darkening filter assembly. The automatic darkening filter assembly has a housing that forms an opening in which a switchable light filter is arranged. The switchable light filter is retained by a first and a second resilient gasket that are arranged on opposite sides of the switchable light filter and which each extend circumferentially adjacent a periphery of the switchable light filter. The invention helps maximizing the robustness of the welding protector and facilitates assembly.
    Type: Application
    Filed: March 19, 2021
    Publication date: July 8, 2021
    Inventors: Johan M. P. Hansson, Kjell A. Hummel, Thomas B. Stenvall, Linus P. Bastman
  • Patent number: 10952902
    Abstract: An automatic darkening filter assembly for a welding protector and a welding protector that includes the automatic darkening filter assembly. The automatic darkening filter assembly has a housing that forms an opening in which a switchable light filter is arranged. The switchable light filter is retained by a first and a second resilient gasket that are arranged on opposite sides of the switchable light filter and which each extend circumferentially adjacent a periphery of the switchable light filter. The invention helps maximizing the robustness of the welding protector and facilitates assembly.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: March 23, 2021
    Assignee: 3M Innovative Properties Company
    Inventors: Johan M. P. Hansson, Kjell A. Hummel, Thomas B. Stenvall, Linus P. Bastman
  • Publication number: 20200297060
    Abstract: A welding helmet (1) with a head suspension system, a protective shield (2) and a movable visor (3). The protective shield forms a see-through window. The welding helmet further has a first neck shield (6). The protective shield forms a lower end at which the first neck shield is removably attachable.
    Type: Application
    Filed: September 19, 2018
    Publication date: September 24, 2020
    Inventors: Martin Berggren, Thomas B. Stenvall
  • Publication number: 20200289323
    Abstract: There is provided a welding helmet having a protective shield and a welding visor. The welding visor is detachably attachable to the protective shield by means of a bayonet coupling. The bayonet coupling has a first bayonet part and a second bayonet part. The first bayonet part is rotatably connected to the welding visor for a rotation between a release position, in which the bayonet coupling is disengaged, and an engage position, in which a disengagement of the bayonet coupling is disabled. The bayonet coupling further forms a pivot for pivoting the welding visor relative to the protective shield between a welding position, in which the welding visor covers the see-through window, and a non-welding position, in which the welding visor uncovers the see-through window. A locking member is provided that is switchable between a locked position and an unlocked position.
    Type: Application
    Filed: December 6, 2018
    Publication date: September 17, 2020
    Inventors: Björn Daniels, Thomas B. Stenvall
  • Publication number: 20190262178
    Abstract: An automatic darkening filter assembly for a welding protector and a welding protector that includes the automatic darkening filter assembly. The automatic darkening filter assembly has a housing that forms an opening in which a switchable light filter is arranged. The switchable light filter is retained by a first and a second resilient gasket that are arranged on opposite sides of the switchable light filter and which each extend circumferentially adjacent a periphery of the switchable light filter. The invention helps maximizing the robustness of the welding protector and facilitates assembly.
    Type: Application
    Filed: November 8, 2017
    Publication date: August 29, 2019
    Inventors: Johan M. P. Hansson, Kjell A. Hummel, Thomas B. Stenvall, Linus P. Bastman