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US 2004/0069814 A1Published application
Device for discharging a spreadable material
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsChristian Hemming, Paul Simeria
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AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsChristian Hemming, Paul Simeria
Estimating the term…
A device for dispensing solid material from a tube having a longitudinally displaceable internal piston moved by an externally operated spindle threading through the piston. At its base the spindle has a narrowed, non-threaded region, such that when the piston is fully withdrawn into the tube, the threads of the spindle and piston slip if the spindle continues to be rotated. To prevent the piston threads from completely disengaging the spindle threads, the spindle's non-threaded region is shorter than the piston's internal threads. In this way, the spindle will not break even if it continues to be rotated after the piston is fully withdrawn into the tube, yet it readily engages the piston threads when turned in the opposite direction to displace the piston towards the dispensing end of the tube. Thus the device as a whole remains reliably usable.
A device for dispensing a spreadable material, comprising a tube-like holding element having a dispensing end and a tube base at an end opposite the dispensing end, in which holding element is arranged an internally screwthreaded, non-rotatable piston-like element that carries the spreadable material and that is displaceable longitudinally from the tube base of the holding element to the dispensing end by an externally operated control wheel provided at the tube base end of the holding element, the control wheel comprising an axially supported externally screwthreaded spindle that extends rotatably through an opening in the tube base into the holding element and that co-operates with the internal screwthread of the piston-like element, wherein the screwthreaded spindle in a region adjoining the tube base has a non-screwthreaded region that has an external diameter smaller than the internal screwthread of the piston-like element, so that when the piston-like element is drawn adjacent to the tube base, the spindle is able to slip relative to the piston-like element if it is rotated any further.
Dependencies are inferred from the claim text.