Maintenance free sensor unit, to be used in vehicle or other machinery, assembled of tube filled with ball elements

摘要

A tube (1), rigid or flexible, can be positioned at a brake cylinder or a anti-lock brake unit in order to serve as a sensor. The tube (1) is filled with small ball elements (2) and closed at the end with a pressure unit assembled of a lid (3) with a helical spring (4). The balls (2) can be made of various suitable materials and the inner surface of the tube (1) can be plain or textured.