Patent ID: 8800622

Claim:
A tire friction device, comprising: a sub-frame assembly comprising a rigid length adjustment assembly with a fixed end component and an adjustable end component, a first grip member and a second grip member; and wherein the first grip member is fixedly attached to the distal end of the fixed end component and the second grip member is fixedly attached to the distal end of the adjustable end component; wherein said grip members engage a tire having a tread surface and inner and an outer sidewalls; wherein said fixed end and adjustment end components are joined such that they are adjustable for length; wherein said adjustment assembly locks said adjustable end component to said fixed end component to maintain said sub-frame assembly at a desired length; whereby when in use, the length adjustment assembly in a tire gripping position is approximately parallel to a tire's rotational plane; whereby when in use, the first grip member and the second grip member are approximately perpendicular to a tire's rotational plane in the tire gripping position; whereby when in use, the adjusting mechanism is adjusted to non-fixedly clamp the tire in the tire gripping position or release the tire friction device from the tire; whereby when in use, the length adjustment assembly is located proximate to the tire outer sidewall when non-fixedly clamping the tire in the tire gripping position, and wherein said grip members increase traction between the tire and a driving surface.