Valve comprising a variable flow opening
OwnerHans-Jörgen BEYERinventor
Life of this patent
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Abstract
A method and apparatus for metering fluids, in particular liquid fluids, includes at least one fluid being guided out of at least one fluid reservoir through a closeable valve device in a discharge direction, at least one valve opening in the valve device being closed or opened by a valve closing member in order for the fluid to flow or be prevented from flowing through the valve opening, the opening and closing movement being performed magnetically by moving the valve closing member, which is arranged and moved in the fluid reservoir on an upstream side of the valve opening.
Claims20
A metering pen for dispensing a medium having an adjusted flow rate onto a substrate, the metering pen comprising:
- a hollow body containing the medium, the hollow body having a valve opening and a valve seat at an upstream side of the valve opening;
- a metering pore at a downstream side of the valve opening configured to release the medium onto the substrate;
- a movable body within the hollow body and arranged at an upstream side of the valve opening, the moveable body configured to close the valve opening and open the valve opening to control variably metered transfer of the medium through the valve opening and the metering pore and onto the substrate as a line or point onto the substrate, depending on a position of the movable body;
- a plurality of magnets arranged outside the hollow body configured to change the position of the moveable body such that the moveable body moves into and out of engagement with the valve seat to cause the opening and closing of the valve opening,
- wherein at least one magnet of the plurality of magnets is arranged at an upstream side of the valve seat and another magnet of the plurality of magnets is arranged at a downstream side of the valve seat.
Dependencies are inferred from the claim text.