Patents by Inventor Kjell Ake Bertil Holmgren

Kjell Ake Bertil Holmgren 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).

  • Depth charge igniter
    Patent number: 4016815
    Abstract: A depth charge igniter has a circumferential water pressure actuated shear pin between the cover and movable plunger adopted to hit a percussion cap, which shear pin may be adjustably engaged along its circumferential length to set a predetermined detonation depth.
    Type: Grant
    Filed: October 29, 1975
    Date of Patent: April 12, 1977
    Assignee: Aktiebolaget Thulinverken
    Inventors: Jan Bjork, Kjell Ake Bertil Holmgren
  • Ventilation devices, in particular smoke and heat ventilation devices
    Patent number: 3994096
    Abstract: Ventilation device with a vent pivotally mounted in a frame and restrained against opening forces by a locking mechanism and also connected to the frame by a hydraulic brake or damper designed to gradually reduce the opening speed of the vent at least towards the end of the opening movement.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: November 30, 1976
    Assignee: Aktiebolaget Svenska Icopalfabriken
    Inventors: Kjell Ake Bertil Holmgren, Per-Arne Lindholm
  • Controlling the microwave heating of flowing blood as a function of heated blood temperature
    Patent number: 3963892
    Abstract: Blood is heated by microwaves confined inside a chamber into which the blood is passed.
    Type: Grant
    Filed: June 13, 1973
    Date of Patent: June 15, 1976
    Assignee: Camph Engineering Company AB
    Inventors: Sven Erik Camph, Kjell Ake Bertil Holmgren
  • Mine anchor
    Patent number: 3951064
    Abstract: A submarine buoyant mine is anchored at a predetermined depth under water by means of an air driven cable drive assembly which pulls in a measured length of cable to set the depth after the mine is launched and the anchor is at the bottom.
    Type: Grant
    Filed: May 7, 1974
    Date of Patent: April 20, 1976
    Assignee: Aktiebolaget Thulinverken
    Inventors: Jan Bjork, Kjell Ake Bertil Holmgren