Patents by Inventor Ralf Larsson

Ralf Larsson 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: 6531086
    Abstract: A method for producing three-dimensional bodies of a large number of mutually connected layers of a particle-shaped material such as a powder, and where the information of the appearance of each layer is achieved from a computer's CAD-unit or similar. An essentially even particle layer (7) of building material is applied on a support base (6) and on a masking device (9) is arranged a masking pattern in accordance with the information from the CAD-unit, which masking device is led over said particle layer and close to it. A radiation producer (8) is arranged or is led over the masking device (9), whereby the particles which are not covered by the masking pattern are exposed for radiation and thereby are attached to each other. The masking pattern is removed from the masking device and new sequences in accordance with the above are carried through until the three-dimensional body (19) is produced.
    Type: Grant
    Filed: October 27, 1999
    Date of Patent: March 11, 2003
    Assignee: Speed Part RP AB
    Inventor: Ralf Larsson
  • Patent number: 4760970
    Abstract: A dispenser for dispensing a web downwardly from a vertically arranged tubular roll of the web provides for preventing unwanted dispensing of the web under the influence of gravity. Each unwanted dispensing is achieved by applying a restraining force to an appropriate location on the roll or on the web, the force being of a magnitude such that the web is restrained against unwinding by gravity yet the web can be pulled downwardly from the roll without tearing. The restraining force can be applied in any of several ways including applying a strip of adhesive tape to one end of the roll, pressing a groove into one end of the roll, applying adhesive spots at spaced intervals along the web before it is wound into a roll or by providing a mechanical arm or the like which presses against the periphery of the roll.
    Type: Grant
    Filed: August 12, 1986
    Date of Patent: August 2, 1988
    Inventors: Ralf Larsson, Ove Larsson
  • Patent number: 4366182
    Abstract: A skin-covered meat product, such as poultry and especially chickens, is roasted and grilled in a cassette-oven installation with a roasting oven, a spray box and a grilling oven. First the skin of the chicken is perforated by injection needles and simultaneously a saline solution with atomized seasonings is injected into the chicken meat. At a starting position the chickens are threaded and fastened on a vertical rotary spit suspended on an endless conveying chain (24), the spits are electrically heated and together with the chickens are transported through the roasting oven where the chickens are exposed to short-wave infrared radiation and roasted. The spits with the chickens thereafter are transported through the spray box where the chickens are sprayed with a mixture of oil and atomized seasonings and then are transported through the grilling oven where the chickens are exposed to medium-wave infrared radiation and grilled.
    Type: Grant
    Filed: September 14, 1981
    Date of Patent: December 28, 1982
    Inventors: Karl-Axel Kohler, Rolf Collin, Ralf Larsson
  • Patent number: 4360307
    Abstract: A device for vertical and/or horizontal transport of loads into and out of a vehicle or the like and particularly intended to enable disabled wheel chair bound persons to be transferred into and out of a passenger car and comprising a tubular supporting member attached to the car in connection to the vehicle roof and in the lateral direction of the vehicle and being intended to support a supporting arm cooperating telescopically with the supporting member and being displaceable along the supporting member. The supporting arm is adapted to be moveable laterally between a position entirely inside the side of the vehicle and positions outside the side of the vehicle, and the electrically powered lifting device is arranged to be suspended from said supporting arm. It is hereby possible for the disabled himself to load and unload himself and/or his wheel chair and the like in and out of the car resp.
    Type: Grant
    Filed: October 14, 1980
    Date of Patent: November 23, 1982
    Assignee: Ide-Produktion Ralf Larsson
    Inventor: Ralf Larsson