The OmniTread can also drive over sand and rocks. It can pass through small holes and climb over tall obstacles.

Innovations:

• Use of pneumatic bellows for joint actuation. Bellows are powerful, naturally compliant, and take up minimal space.

• Maximal coverage of all sides of all segments with extra wide moving tracks.

• Unique pneumatic control method allows simultaneous proportional control of stiffness and joint angles.

• The "drive shaft spine" is powered by a single electric motor in the center segment. The spine runs through the center of all segments and provides torque to all tracks.

The OmniTread Model OT-4 fits through a 4-inch diameter hole. It weighs 9 pounds.

The OT-4 has all the innovative design feature of the OT-8, and in addition:

• OT-4 is designed to carry onboard electric energy sources for up to 75 minutes of continuous operation.

• Onboard pneumatic power is  provided by two micro-compressors.

• Innovative micro-clutches allow selective engagement or disengagement of each individual track, for maximal power savings.