Pump chambers minimizing formation of deposits and method therefor.

摘要

Pump chambers (16A) minimizing formation of deposits and particularly usable in beverage makers, for example, have a liquid-contacting heated surface (25) provided with abrupt discontinuities (39) - e.g. sharp edges or corners - to promote flaking-off of mineral deposits. These edges (39) may be fins (38, 40) of rectangular or triangular cross-section.