Wallsten Medical S.a.

Zero Weed Ab

P&auml;r Henriksson

Bertil Persson

Michel Bachmann

Tomas Nybrant

Berit Mattsson

Hans I Wallst&eacute;n

A device for carrying out hyperthermia in a mammalin uterus cavity, including an elongate, rigid distal section (,) and a flexible and elastic bladder (,) encompassing said distal section which, together with said bladder, is intended for insertion into said uterus cavity, further including means (,) for the supply of a heat-transmitting medium under pressure for the expansion of said bladder (,) within said uterus cavity, and heating means (,) for heating said medium, the device further having an intermediate section (,) whose distal part when inserted is positioned in a cervix canal belonging to said uterus, and a proximal section (,) for operating the device, said distal and intermediate sections (,) containing at least a central tube (,), whose distal part is surrounded by said bladder and is provided with at least one outlet (,) for said medium within said bladder, and whose intermediate part is surrounded by an axially displacable tube (,), onto whose distal end (,) the proximal end (,) of said bladder (,) is attached, characterized by means (,) for determining the axial position of the distal end (,) of said axially displacable tube and thereby also the axial position of the proximal end (,) of said bladder (,) so that the length of said bladder (,) matches the depth of a cavity subject to treatment, and means (,) for locking said tube (,) with its distal end (,) in such matching position; and the invention also involves methods of thermal treatment of human uterus cavity linings and a device for thermal treatment of mammalian body cavities or ducts, such as urethras.

Device and method for medical treatment

Weed seeds are controlled by high voltage pulses with short duration which electropermeabilize the cell membranes of weed seeds in the ground. The device is selective and damages only germinating weed seeds and plants early in their life cycle. The required amount of energy is small; with rectangular pulses the optimal field strength is between 100-300 kV/m with a duration of (10-100 microseconds). A transformer placed on a sowing machine transforms electrical energy to high voltage pulses. The energy may be taken from the pulling tractor via a transmission or from an integrated power source. The high voltage pulses are applied to electrically conducting via applicators to two or more fixedly spaced plates to the soil around newly sown seeds.

Method and device for weed control

Growing community of inventors

Lund, Sweden

Pär Henriksson

Growing community of inventors

Lund, Sweden

P&auml;r Henriksson

Pär Henriksson