Floor milling machines

A floor milling machine comprising:

• a chassis structure supported by a plurality of ground-engaging wheels,
• rotatable milling means mounted on the chassis structure and engageable with a floor surface to remove material from the floor surface,
• height adjustment means to adjust the level of one or more of the wheels relative to the milling means,
• ultrasonic detection means to sense information about the floor surface beneath the machine, and
• control means to control the height adjustment means in response to signals from the detection means, wherein said ultrasonic detection means includes means for sensing information about the location of steel reinforcements within a concrete floor.

A floor milling machine comprising:

• a chassis structure supported by a plurality of ground-engaging wheels,
• rotatable milling means mounted on the chassis structure and engageable with a floor surface to remove material from the floor surface,
• height adjustment means to adjust the level of one or more of the wheels relative to the milling means,
• detection means to sense information about the floor surface beneath the machine,
• control means to control the detection means in response to signals from the detection means,
• storage means mounted on the chassis structure to receive material such as dust and debris removed from the floor surface as the milling means passes over and engages the floor surface, and
• vacuum means to transfer the material removed from the floor surface from adjacent the milling means to the storage means.