LABORATORY FLASKS AND FLASK KITS

摘要

The innovative glass flasks have a standard taper outer joint to fit the most commonly used glassware in chemical laboratories. Unlike the round bottom flasks, the innovative flasks with an external flat bottom can be kept upright on the bench without the flask holder support. The flasks can be held by a corresponding shaped cooling block or heating block to perform multi-flask reactions simultaneously on a magnetic hot plate stirrer without the use of clamps at various temperatures. It also ensures that the magnetic stir bars spin consistently and efficiently on a flat or a shallow hemispherical bottom when the flasks are offset from the center of the magnetic stirrer. The flasks can also resist fracturing under vacuum for solvent distillations.

主权项

1. A glass flask comprising:
a standard taper outer joint having an opening; an upper portion adjacent to the joint; a barrel-shaped or a taper-shaped or a curved taper-shaped portion adjacent to the upper portion; a curved transition lower portion adjacent to the barrel-shaped or taper-shaped or curved taper-shaped portion; an internal hemispherical shaped or shallow hemispherical shaped or flat bottom; and an external flat bottom in opposite side of the internal bottom.