Metering dispenser for high-viscosity compositions

A dispensing device for metering high-viscosity compositions comprising an elongate hollow body having a discharge opening at its front end, a piston disposed within the body for movement in a longitudinal direction thereof, the composition being contained between said piston and said discharge opening, a nut mounted on the rear end of the body, a threaded spindle engaging said nut and bearing with its front end against the rear side of said piston, said spindle having at least one longitudinal groove for indicating the angular position of said spindle relative to said nut, and detent means comprising a pawl mounted on the rear side of said nut, the pawl including a resilient member adapted to snap into said at least one groove of said spindle and a stop member for limiting a rotation of said resilient member against a prescribed rotational direction of said threaded spindle.

A dispensing device for metering high-viscosity compositions comprising an elongate hollow body having a discharge opening at its front end, a piston disposed within the body for movement in the longitudinal direction thereof, the composition being contained between said piston and said discharge opening, a nut mounted on the rear end of the body, a threaded spindle engaging said nut and bearing with its front end against the rear side of said piston, said spindle having at least one longitudinal groove for indicating the annular position of said spindle relatively to said nut, and detent means mounted on said nut for cooperating with said at least one groove;

• said device having a flange formed at the rear end of the body, said nut being adapted to be slid onto said flange in a direction transversely of said longitudinal axis of the body;
• said flange having lateral flattenings extending parallel to said transverse direction and said nut has corresponding flat portions for engagement by said flattenings.

A dispensing device for metering high-viscosity compositions, comprising an elongate hollow body having a discharge opening at its front end, a piston disposed within the body for movement along the longitudinal direction thereof, the composition being contained within the body between said piston and said discharge opening, a flange formed at the rear end of the body, a nut slid into engagement with said flange in a direction transverse of said longitudinal axis of the body, and a threaded spindle engaging said nut and bearing with its front end against the rear side of said piston;

• wherein said flange has at least one recess and said nut has a projection for engagement with said at least one recess.