Wheel chock device

A wheel chock device for stopping a wheel of a vehicle from rolling on a ground surface, said device comprising:

• a profile including a generally flat bottom surface for being in contact with a ground surface and extending between a first end and a second end;
• and
• a top surface for being in contact with the wheel, the top surface extending over the bottom surface, the top surface having a contact surface being able to support the wheel simultaneously over at most two points of contact thereof;
• the top surface including a first segment adjacent the first end and a second segment extending from the first segment and continuing the first segment away from the first end, the first and second segments defining a contact surface, the first segment being able to support the wheel and forming a generally flat first plane defining a first angle (ϕ1) relative to the bottom surface, a tangent of the first angle (ϕ1) being equal to or smaller than a minimum static coefficient of friction (μmin) between the bottom surface and the ground surface;
• and
• the first segment including a first contact point (P1) adjacent the first end and located at a first height (hR) relative to the bottom surface to allow the wheel to engage the chock device, the first height (hR), relative to a radius (r) of the wheel and the minimum static coefficient of friction (μmin), being obtained from the equation:
• h
• R
• <
• r
• (
• 1
• -
• 1
• 1
• +
• μ
• min
• 2
• )
• the second segment including a second contact point (P2) being adjacent the second end and closer to the second end than the first contact point (P1) is;
• the second segment, at the second contact point (P2), defining a tangent having a second angle (ϕ2) relative to the bottom surface, a tangent of the second angle (ϕ2) being equal to or smaller than a maximum static coefficient of friction (μmax) between the bottom surface and the ground surface, and larger than the tangent of the first angle (ϕ1);
• wherein a perpendicular projection of the first contact point (P1) on the bottom surface intersects the bottom surface at a first intersection (R) adjacent the first end, wherein the tangent of the second angle (ϕ2) intersects the bottom surface at a second intersection (B), and wherein the first segment has a rolling length (AA′), starting at the first point of contact (P1), ensuring the wheel to roll on the first segment and be entirely supported thereon before contacting the second segment;
• a minimum distance (BRmin) between the first and second intersections, relative to the radius (r) of the wheel, the rolling length (AA′), and both the minimum (μmin) and maximum (μmax) static coefficients of friction, is obtained by the equation:
• BR
• min
• =
• r
• (
• μ
• max
• 1
• +
• μ
• max
• 2
• -
• μ
• min
• 1
• +
• μ
• min
• 2
• -
• 1
• μ
• max
• +
• 1
• μ
• max
• ⁢
• 1
• +
• μ
• max
• 2
• )
• +
• AA
• ′
• (
• 1
• 1
• +
• μ
• min
• 2
• -
• μ
• min
• μ
• max
• ⁢
• 1
• 1
• +
• μ
• min
• 2
• )
• .