Patents by Inventor Nils B. Nilson

Nils B. Nilson 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: 4983164
    Abstract: The invention relates to an automatic two-chamber injector for mixing and injecting a medical solution. The injector comprises a barrel (11) having a first end with a receiving portion (15) for an injection needle (17), said portion being sealed prior to use, and a second end with a displaceable plunger (27). The barrel (11) comprises two chambers (29, 30) separated by a migrationproof membrane (28), said membrane (28) being adapted to rupture when the plunger (27) is displaced towards the first end of the barrel (11).The invention also related to a method for mixing and injecting a solution by means of an automatic two-chamber injector and to a cartridge for a two-chamber injector.
    Type: Grant
    Filed: April 12, 1988
    Date of Patent: January 8, 1991
    Assignee: Astra Meditec AB
    Inventors: Karl-Axel Hook, Nils B. Nilson, Kjell I. Wellenstam
  • Patent number: 4826027
    Abstract: A seal for container locks and the like comprises two units (1,2,3;8,14,15) which are snapped into each other. The snap action is carried out by means of a plug (14) forming part of one of the units (8,14,15) and which normally closes a cavity (13) containing an indicating means (21). When the parts are separated the plug is drawn out from this position and allows the indicating means to leave said cavity. In one embodiment the plug (14) is hollow and is closed by means of a steel pin (15) which when inserted has put the indicating means under pressure and the plug has blocking vanes (18). In another embodiment the plug is not hollow but has a weak lower portion and supports a resilient blocking ring. A steel pin floats in the cavity and can break the weak wall when an attempt to brake the seal is made.
    Type: Grant
    Filed: March 2, 1988
    Date of Patent: May 2, 1989
    Assignee: Tally Safe Systems AB
    Inventor: Nils B. Nilson
  • Patent number: 4695272
    Abstract: A drug release device for inclusion in a parenteral drug delivery system, said device comprising a chamber having an inlet for a liquid administerable to a patient by a parenteral route, a drug dissolution space within said chamber, through which said liquid can be made flow, an outlet for said liquid, and means for receiving and retaining within said drug dissolution space a drug preparation from which a drug is releasable to said liquid during such parenteral delivery, said device characterized in having means for providing the same with one or more durg release cells within which such drug preparation is initially held isolated from the liquid, each of said drug cells having means for emptying its contents of drug preparation into said drug dissolution space after insertion thereof in the drug release device.Such device can be used for sequential emptying of a drug preparation from two or more such drug cells whereby a parenteral liquid dissolves the drug.
    Type: Grant
    Filed: April 23, 1985
    Date of Patent: September 22, 1987
    Assignee: Aktiebolaget Hassle
    Inventors: Bengt G. Berglund, Karl-Erik L. Falk, Dan A. Magnusson, Nils B. Nilson, Ake S. Nilsson
  • Patent number: 4664257
    Abstract: The invention relates to a method and a capsule for the storage and mixing of the two co-reactive basic materials for dental amalgam. The capsule comprises an elastically bendable length of tube bent into V-shape with the arms each forming chambers and with the tip between the arms forming a point of separation between the chambers. Each of the basic materials is accommodated and stored in its own chamber and can be mixed by straightening out the length of tube, the ends of which are sealed, so that the point of separation is opened up, and by shaking the length of tube in its axial direction. The invention also relates to a method in manufacturing the capsule in which the tube length prior to bending into V-shape is pre-shaped in one section at the center of the length of the tube by providing two transverse points of compression which are mutually separated by an intervening section.
    Type: Grant
    Filed: April 23, 1981
    Date of Patent: May 12, 1987
    Assignee: Kenova AB
    Inventor: Nils B. Nilson
  • Patent number: 4325369
    Abstract: A disposable container for forming the end wall of the open end of a barrel of a syringe and for being retained thereon by the resilient interaction of a surface of the barrel and the resilient periphery of a circumferential flange at the intersection of a substantially rigid first wall portion and a flexible second wall portion of the container. Preferably the resilient periphery flexes when pressed into the barrel and then springs out to engage an annular channel-like area in the barrel.
    Type: Grant
    Filed: July 16, 1980
    Date of Patent: April 20, 1982
    Assignee: KeNova AB
    Inventor: Nils B. Nilson
  • Patent number: 4312344
    Abstract: A syringe with a plunger reciprocable therein has a collapsible container removably attached to the discharge end of the barrel. The container can be collapsed by means of the plunger. The stroke volume of the plunger between displaced positions thereof corresponding to the container being empty and filled, respectively, is substantially equal to the volume of the container.
    Type: Grant
    Filed: April 3, 1980
    Date of Patent: January 26, 1982
    Assignee: Kenova AB
    Inventor: Nils B. Nilson
  • Patent number: 4236516
    Abstract: In a syringe comprising a barrel and a plunger reciprocably mounted therein the end wall of the barrel at the discharge end thereof is formed by a disposable container removably attached to the barrel. A flexible wall portion of the container facing the plunger is moved towards and away from a rigid wall portion of the container by the reciprocating movement of the plunger in order to decrease and increase, respectively, the interior volume of the container.
    Type: Grant
    Filed: February 16, 1978
    Date of Patent: December 2, 1980
    Inventor: Nils B. Nilson
  • Patent number: 4141474
    Abstract: A self-closing closure for a tube or package having a resilient wall for dispensing flowable material upon the application of pressure on the tube, utilizing a relatively stiff spider for supporting an outwardly extending valve stem having a closed outer surface and a diaphragm member having its periphery interconnected with the periphery of the spider to form a closure unit and its inner portion forming a valve with the valve stem. The diaphragm member is formed with a relatively thick flange substantially parallel with the walls of the tube for interconnection therewith, a relatively thin, resilient planar portion extending inwardly toward the stem, and a substantially tubular portion surrounding the stem and terminating in an open lip which makes a close, sliding fit with the outer surface of the stem.The resilient, planar portion of the diaphragm member is normally concave, being formed with an unstressed negative angle of substantially 5.degree. to 15.degree.
    Type: Grant
    Filed: July 9, 1976
    Date of Patent: February 27, 1979
    Assignee: KeNova AB
    Inventor: Nils B. Nilson
  • Patent number: D314051
    Type: Grant
    Filed: January 7, 1987
    Date of Patent: January 22, 1991
    Assignee: Aktiebolaget Hassle
    Inventors: Bengt G. Berglund, Nils B. Nilson, Ake S. Nilsson
  • Patent number: D314622
    Type: Grant
    Filed: December 16, 1987
    Date of Patent: February 12, 1991
    Assignee: AB Astra
    Inventors: Lars-Erik Andersson, Arne T. Eek, Anders T. Kers, Nils B. Nilson, Nils-Ake W. Ternerot