Electromagnetically operated diaphragm pump

A fluid flow machine, comprising an axial piston pump, particularly a diaphragm pump;

• an electromagnet adjacent to and arranged to operate said pump and to thereby generate heat, said electromagnet having an at least substantially cylindrical external casing surface;
• and a housing including a partition disposed between said pump and said electromagnet, a substantially cylindrical section adjacent to said partition, spacedly surrounding at least a portion of said external casing surface and defining therewith a gap of substantially constant width for transfer of heat from said cylindrical external casing surface to said cylindrical section, said cylindrical section having an outer surface which is exposed to the surrounding atmosphere and external heat dissipating projections at least some of which extend circumferentially of said cylindrical section, said housing further including an additional section integral with and supporting said cylindrical section and the cross-sectional area of the interior of said additional section exceeding the cross-sectional area of the interior of said cylindrical section, said additional section extending downwardly beyond said cylindrical section and said housing also including a supporting leg rigid with said additional section and having an extension extending toward said pump and spaced apart from and disposed at a level below said cylindrical section, said cylindrical section, said additional section and said leg of said housing consisting of a synthetic plastic material.