Discharge device
AssigneeIng. Erich Pfeiffer GmbH
InventorsThomas Bruder, Andi Herz, Gerald Krampen
Life of this patent
Estimating the term…
Abstract
The invention relates to a discharge device for discharging liquid medium, with a pump device with a variable volume pump chamber, a discharge opening for the liquid medium, a feed path between the pump device and the discharge opening, and an outlet valve which is designed to open the discharge opening as a function of the pressure in the feed path, and to a discharge head provided for this purpose. The discharge device or the discharge head has a gas-permeable and liquid-tight air outlet which connects the pump chamber or the feed path to an external environment.
Claims13
Discharge device for discharging liquid or pasty medium, comprising:
- a pump device with a variable volume pump chamber limited by an input valve on an input side and an output valve on an output side,
- a discharge opening for the liquid medium,
- a feed path between the output side of the pump device and the discharge opening,
- an outlet valve which is designed to open the discharge opening as a function of the pressure in the feed path, and
- a gas-permeable and liquid-tight air outlet which connects the pump chamber or the feed path to an external environment, said air outlet being closed by a gas-permeable and liquid-tight membrane disposed to allow air located in the feed path under positive pressure to escape through said air outlet.
Discharge head for a discharge device, comprising:
- a discharge opening for discharging liquid medium,
- a feed path for transporting the medium to the discharge opening,
- an outlet valve which is designed to open the discharge opening as a function of the pressure of the feed path, and
- a gas-permeable and liquid-tight air outlet which connects the feed path to an external environment, said outlet being closed by a gas-permeable and liquid-tight membrane that allows air located in the feed path under positive pressure to escape through said air outlet.
Dependencies are inferred from the claim text.