Atomizing or dosing pump
AssigneeIng. Erich Pfeiffer GmbH
InventorLeo Maerte
Life of this patent
Estimating the term…
Abstract
A dosing or atomizing pump for liquid, creamy or pasty media has, in addition to its outlet valve provided on the pump chamber an additional valve provided in the pump operating pushbutton and closes the discharge opening directly at its mouth. By means of the hydraulic pressure, the additional valve body is operated by means of a differential piston. In a variant, the valve body can be a functional part of an atomizer nozzle. The additional valve prevents drying or other negative influencing of the medium in the discharge passage.
Claims12
A pump construction for dispensing a fluid in an outlet direction, comprising:
- a pump with a pump pressure chamber, a fluid inlet leading thereto and a fluid outlet therefrom, the inlet having an inlet valve, said inlet valve being a valve opening only for fluid suction into said pump pressure chamber,
- the outlet forming an outlet passage extending between the pump pressure chamber and a final fluid outlet opening of the pump construction for dispensing the fluid, said outlet having a first fluid outlet valve for the passage of the fluid from the pressure chamber to a part of the outlet passage being positioned downstream of the first outlet valve, and a second fluid outlet valve having a closure member (13) positioned downstream of the first outlet valve in the outlet passage, wherein the first fluid outlet valve (23) is a valve only opening under fluid pressure in the pump pressure chamber (18) for fluid passage in the fluid outlet direction and
- wherein the second fluid outlet valve is a valve only opening under fluid pressure for fluid passage in the fluid outlet direction and closing against fluid passage in a direction opposite to the outlet direction, the closure member of the second fluid outlet valve constituting the final fluid outlet opening.
A pump construction for dispensing a fluid in an outlet direction, comprising:
- a pump with a pump pressure chamber, a fluid inlet leading thereto and a fluid outlet therefrom, the outlet forming an outlet passage extending between the pump pressure chamber and a final fluid outlet opening of the pump construction for dispensing the fluid, said outlet having a first fluid outlet valve for the passage of the fluid from the pressure chamber to a part of the outlet passage being positioned downstream of the first outlet valve, and a second fluid outlet valve having a closure member positioned downstream of the first outlet valve in the outlet passage, wherein the second fluid outlet valve is a valve only opening under pressure in the fluid outlet direction and closing against fluid passage in a direction opposite to the outlet direction, the closure member of the second fluid outlet valve constituting the final fluid outlet opening and,
- wherein a rear end of the closure member of the second fluid outlet valve forms a closing spring for the closure member, the closing, spring comprising elastic outwardly spreadable spring fingers.
A pump construction for dispensing a fluid in an outlet direction, comprising:
- a pump with a pump pressure chamber, a fluid inlet leading thereto and a fluid outlet therefrom, the outlet forming an outlet passage extending between the pump pressure chamber and a final fluid outlet having a first fluid outlet valve for the passage of the fluid from the pressure chamber to a part of the outlet passage being positioned downstream of the first outlet valve, and a second fluid outlet valve having a closure member positioned downstream of the first outlet valve in the outlet passage, wherein the second fluid outlet valve is a valve only opening under pressure in the fluid outlet direction and closing against fluid passage in a direction opposite to the outlet direction, the closure member on the second fluid outlet valve constituting the final fluid outlet opening wherein a rear end of the closure member of the second fluid outlet valve forms a closing spring for the closure member, the closing spring comprising elastic outwardly spreadable spring fingers, and,
- the ends of the spring fingers slideably engage a conical surface inside the outlet passage.
Dependencies are inferred from the claim text.