Positive displacement pump and a device comprising the positive displacement pump for dispensing at least one fluid component.

摘要

A positive displacement pump (1) comprising a cylinder (1a, 1b) which can be moved from side to side a piston (4) by a drive (3, 7, 8), wherein a seal comprises the piston (4) and rests sealingly on the outer wall of the piston (4) and the cylinder inner wall (1a, 1b) and the seal (40) divides the cylinder into a first and a second space (5, 6) where the first space (5) filled with a medium is joined to a joint connection (10), whereby the means for movement of the piston (4) can be pressed out of the space (5) cylinder or can be transported thereinto, characterized in that a pressure generating device (14) regulates a pressure in the second space (6) to the pressure prevailing in the first space (5) corresponds approximately.