Membrane depressor. (Machine-translation by Google Translate, not legally binding)

摘要

Membrane depressor, comprising a chamber in which a displaceable membrane is housed, operable by a set of connecting rod and crankshaft, characterized in that the connecting rod and membrane are joined rigidly, without relative movement between both elements; and because the crankshaft is mounted on the housing and related to the connecting rod, by self-lubricating sealed bearings. (Machine-translation by Google Translate, not legally binding)