Truck cab suspension unit

A truck cab suspension unit, comprising:

• a truck cab;
• a truck chassis;
• a first yoke having a bridge portion and a pair of laterally spaced arms extending in the same direction from said bridge portion;
• a second yoke having a bridge portion and a pair of laterally spaced arms extending in the same direction from said bridge portion, the arms of said second yoke fitting inside of and adjacent to the arms of the first yoke in sliding contact, one arm of each yoke cooperating with the corresponding arm of the other yoke to define the corresponding lateral side of the unit and the bridge portions of said yokes defining the top and bottom sides of said unit;
• an elongated slot formed in one of the arms on each lateral side of the unit, said slots extending in the direction from one bridge portion to the other bridge portion;
• a bearing secured to the other of the arms on each lateral side of the unit, said bearing being received in the elongated slot of the adjacent arm;
• a spring;
• means for mounting said spring between the bridge portions;
• means for mounting one of said yokes to said truck cab and the other of said yokes to said truck chassis;
• and
• stop means secured to one of the arms on each lateral side of the unit to abut the end of the other arm on the same lateral side at a fully compressed limit of travel of one yoke relative to the other;
• wherein said stop means comprises a rib formed on one arm on each lateral side of the unit.

A truck cab suspension unit, comprising:

• a first yoke having a bridge portion and a pair of laterally spaced arms extending in the same direction from said bridge portion;
• a second yoke having a bridge portion and a pair of laterally spaced arms extending in the same direction from said bridge portion, the arms of said second yoke fitting inside of and adjacent to the arms of the first yoke in sliding contact, one arm of each yoke cooperating with the corresponding arm of the other yoke to define the corresponding lateral side of the unit and the bridge portions of said yokes defining the top and bottom sides of said unit;
• an elongated slot formed in one of the arms on each lateral side of the unit, said slots extending in the direction from one bridge portion to the other bridge portion;
• a bearing secured to the other of the arms on each lateral side of the unit, said bearing being received in the elongated slot of the adjacent arm;
• means for mounting a spring between the bridge portions;
• means for mounting one of said yokes to a truck cab and the other of said yokes to a truck chassis;
• and
• stop means secured to one of the arms on each lateral side of the unit to abut the end of the other arm on the same lateral side at a fully compressed limit of travel of one yoke relative to the other, said stop means comprising a rib formed on one arm on each lateral side of the unit;
• wherein a guideway is formed on one of the arms on each lateral side of the unit and the other arm on the same lateral side is received in a sliding fit within said guideway.

A truck cab suspension unit, comprising:

• a first yoke having a bridge portion and a pair of laterally spaced arms extending in the same direction from said bridge portion;
• a second yoke having a bridge portion and a pair of laterally spaced arms extending in the same direction from said bridge portion, the arms of said second yoke fitting inside of and adjacent to the arms of the first yoke in sliding contact, one arm of each yoke cooperating with the corresponding arm of the other yoke to define the corresponding lateral side of the unit and the bridge portions of said yokes defining the top and bottom sides of said unit;
• an elongated slot formed in one of the arms on each lateral side of the unit, said slots extending in the direction from one bridge portion to the other bridge portion;
• a bearing secured to the other of the arms on each lateral side of the unit, said bearing being received in the elongated slot of the adjacent arm and permitting rotation of said yokes relative to one another about an axis of said bearing;
• means for mounting a spring between the bridge portions;
• and
• means for mounting one of said yokes to a truck cab and the other of said yokes to a truck chassis with one lateral side of the unit substantially fore and the other lateral side of the unit substantially aft with respect to the fore and aft directions defined by the truck.