Kentledge apparatus.

摘要

Kentledge apparatus having an open-ended chamber which is closable by placement on or penetration into soil or other base material. An air pump for evacuating the chamber in order to create a differential pressure across the wall of the chamber thereby to provide a force holding the chamber against the soil, an abutment fixed to the chamber and a jack or other driving means at contact with the abutment for exerting a force towards the soil, the force being counteracted through the abutment by the chamber.