Patent ID: 7011470

Claim:
A speed control device for controlling the speed of a vehicle, the speed control device comprising: a housing having a top with an opening, a bottom, and a hollow interior; a plate having an upper surface and a lower surface, the plate slidably disposed within the interior of the housing; a bump canister disposed within the interior of the housing and capable of protruding through the opening; a spring disposed within the interior of the housing and having a first end abutting the top of the housing and a second end abutting the upper surface of the plate; and a pressure source connected to the housing and capable of placing pressure, either hydraulic or pneumatic, on the lower surface of the plate such that when the pressure source places pressure onto the plate, the plate slides upwardly toward the top of the housing causing the bump canister to protrude through the opening and when the pressure source is not placing pressure onto the plate, the plate slides downwardly toward the bottom of the housing through the biasing action of the spring on the plate, causing the bump canister to retract back into the housing.