Patent ID: 8371562

Claim:
A cab mounting assembly for a vehicle, the cab mounting assembly comprising: a shock absorber having a pressure tube and a piston rod movable in an axial direction with respect to said pressure tube; an air spring assembly attached to said shock absorber; and a double path top mount attached to both said shock absorber and said air spring assembly, said double path top mount comprising: a bearing assembly attached to said air spring assembly, said bearing assembly including a cylindrical first inner metal adapted to be attached to a cab of the vehicle, a first cylindrical outer metal fixedly attached to said air spring assembly and surrounding said first inner metal and a first cylindrical elastomeric member disposed between said first cylindrical outer metal and said first cylindrical inner metal, said first cylindrical elastomeric member having a first hardness; an elastomeric mount disposed between said bearing assembly and said shock absorber, said elastomeric mount including a second cylindrical inner metal surrounding and directly engaging said first cylindrical outer metal of said bearing assembly, a second cylindrical outer metal surrounding said second cylindrical inner metal and fixedly attached to said shock absorber and a second cylindrical elastomeric member disposed between said second cylindrical outer metal and said second cylindrical inner metal, said second cylindrical elastomeric member having a second hardness; and a dynamic air seal sealing a chamber of said air spring assembly, said dynamic air seal having a rigid inner member secured to said shock absorber, a rigid outer member secured to said air spring assembly and an elastomeric member separate from said elastomeric mount disposed between said rigid inner member and said rigid outer member; movement of said piston rod of shock absorber in the axial direction with respect to said air spring assembly being allowed by said elastomeric member; wherein said second cylindrical elastomeric member deflects in a radial direction when said piston rod moves in said first axial direction; and deflection of said second elastomeric member is independent from deflection of said first elastomeric member.