Pumping device at least for pumping a fluid and pump comprising a pumping device of this type

• Main Authors: HAUG, Nico, FREIHERR VARNBÜLER VON UND ZU HEMMINGEN-REDSCHLAG, Lars, KRUTZENBICHLER, Alois, RITSCHKA, Raymond
• Format: Patent
• Language: English
• Published: 02.06.2022
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS; WEAPONS

The invention relates to a pumping device at least for pumping a fluid, comprising at least one pumping chamber (18), comprising at least one pumping chamber element (20) which at least partially delimits the pumping chamber (18) and which is dimensionally stable, and comprising at least one elastically deformable, in particular annular, pumping element (22), in particular a pump diaphragm, which delimits the pumping chamber (18) together with the pumping chamber element (20) and which is arranged on the pumping chamber element (20), wherein the pumping element (22) has at least one sealing protrusion (90), which is integrally formed with the main body (76) of the pumping element (22) and is arranged at least partially in a sealing groove (88) of the pumping chamber element (20) in a state in which the pumping element (22) is arranged on the pumping chamber element (20). According to the invention, the pumping chamber element (20) has a counter surface (74) for cooperating with a conveying surface (78) of the main body (76) of the pumping element (22) to convey a fluid, said counter surface extending over at least three consecutive (in particular when viewed as a cross-section) circular arc sections, wherein at least one edge region (92) of the pumping chamber element (20) bordering the sealing groove (88) is arranged, in particular directly, adjacent to at least one of the three circular arc sections.