Patents by Inventor Lars E. G. Olsson

Lars E. G. Olsson 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).

  • Pneumatic-hydraulic tool, preferably for blind riveting
    Patent number: 4310056
    Abstract: A pneumatic-hydraulic blind riveting tool comprises on the one hand a hydraulic working piston (25) in a hydraulic cylinder (27) cooperating with a chuck, and on the other hand a pneumatic power piston device (50) in an air cylinder (51) adapted to produce a working pressure in the hydraulic medium by means of a plunger (49). The working piston is adapted to be fed forwards in the hydraulic cylinder a number of steps during each working cycle, and means are provided to cause the power piston device to execute a corresponding number of stroke cycles, each of which includes a forward and return piston stroke.The working piston is adapted to be fed forward one step on each piston stroke. A valve (31) in a plunger passage (29) prevents hydraulic medium from retreating in the plunger passage during the return movement of the plunger. Instead, the plunger passage is filled with hydraulic medium from a reservoir (69) during the backward movement.
    Type: Grant
    Filed: January 7, 1980
    Date of Patent: January 12, 1982
    Inventor: Lars E. G. Olsson
  • Pneumatic-hydraulic tool, preferably for blind riveting
    Patent number: RE31957
    Abstract: A pneumatic-hydraulic blind riveting tool comprises on the one hand a hydraulic working piston (25) in a hydraulic cylinder (27) cooperating with a chuck, and on the other hand a pneumatic power piston device (50) in an air cylinder (51) adapted to produce a working pressure in the hydraulic medium by means of a plunger (49). The working piston is adapted to be fed forwards in the hydraulic cylinder a number of steps during each working cycle, and means are provided to cause the power piston device to execute a corresponding number of stroke cycles, each of which includes a forward and return piston stroke.The working piston is adapted to be fed forward one step on each piston stroke. A valve (31) in a plunger passage (29) prevents hydraulic medium from retreating in the plunger passage during the return movement of the plunger. Instead, the plunger passage is filled with hydraulic medium from a reservoir (69) during the backward movement.
    Type: Grant
    Filed: March 15, 1983
    Date of Patent: July 30, 1985
    Inventor: Lars E. G. Olsson