Dispensing device with one-hand operation for pasty substances
AssigneeWella Aktiengesellschaft
InventorsLudwig Sigmund, Norbert Golzer, Franz Steigerwald
Life of this patent
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Abstract
A dispensing device for applying a pasty substance, for example to a human hair, comprises a cup-shaped cylindrical container and a piston located therein and displaceable within the container. The container is sealingly connected to an operating extension having a cylindrical passage terminated with a dispensing nozzle which is selectively closed by a sealing cap. The piston is formed with two sealing lips spaced from one another in the axial direction and outwardly and angularly extending from the periphery of the piston so that one of the lips sealingly connects the piston to the internal wall of the container whereby the second lip is adapted to reliably guide said piston within the container.
Claims18
A dispensing device with one-hand operation for pasty substances, comprising a cup-shaped cylindrical container for a pasty substance;
- a piston having a peripheral wall and being displaceable within said container, said container having a longitudinal axis and an internal wall defining the interior of the container and terminated with an open end;
- sealing means fixedly attached to said piston and adapted to conjointly act with said internal wall;
- an operating extension fixedly attached to said piston and extending in an axial direction beyond said open end to be freely accessible from outside of said container;
- two grip handles formed on said operating extension;
- said operating extension including a central part provided with an internal cylindrical passage having one end communicating with said interior of the container and another end provided with a dispensing nozzle;
- means for guiding said piston parallel to said axis;
- and a sealing cap selectively closing said dispensing nozzle, said sealing means including a first sealing lip formed on said piston distant from said open end and outwardly and angularly extending from said peripheral wall, said guiding means including a second sealing lip formed on said piston and outwardly and angularly extending from said peripheral wall, said second lip being spaced from said first lip in the axial direction and being formed adjacent said open end, said internal wall including a projection radially inwardly extending therefrom said positioned in the vicinity of said open end, said central part having a peripheral rib adapted to engage with said projection.
Dependencies are inferred from the claim text.