Abstract: A low profile chassis and suspension system for a road vehicle. The chassis supports a payload section or cargo compartment, such as for a delivery truck, ambulance, or shuttle bus. The chassis includes a largely planar frame having a top surface which is located beneath the rotational axes of the rear wheels. The wheel suspension system is particularly compact and close to the road surface. In some embodiments each wheel is suspended from the vehicle by a pair of pivotal support arms. Preferably, one arm is located above the other arm, and both arms pivot along pivot axes that are generally perpendicular to the rotational axis of the supported wheel. A spring urges one of the arms apart from the frame. In other embodiments, the spring is placed beneath the rotational axis of the wheel. In some embodiments both of the pivoting support arms are located beneath the rotational axis of the wheel.

Abstract: A low profile chassis and suspension system for a road vehicle. The chassis supports a payload section or cargo compartment, such as for a delivery truck, ambulance, or shuttle bus. The chassis includes a largely planar frame having a top surface which is located beneath the rotational axes of the rear wheels. The wheel suspension system is particularly compact and close to the road surface. In some embodiments each wheel is suspended from the vehicle by a pair of pivotal support arms. Preferably, one arm is located above the other arm, and both arms pivot along pivot axes that are generally perpendicular to the rotational axis of the supported wheel. A spring urges one of the arms apart from the frame. In other embodiments, the spring is placed beneath the rotational axis of the wheel. In some embodiments both of the pivoting support arms are located beneath the rotational axis of the wheel.

Abstract: A low profile chassis and suspension system for a road vehicle. The chassis supports a payload section or cargo compartment, such as for a delivery truck, ambulance, or shuttle bus. The chassis includes a largely planar frame having a top surface which is located beneath the rotational axes of the rear wheels. The wheel suspension system is particularly compact and close to the road surface. A trailing arm-type wheel support supports a stub axle in a cantilevered fashion. A spring urges the wheel support apart from the frame. A planar portion of the wheel support, the wheel support pivot joints, and the spring are located beneath the rotational axis of the wheel. In another embodiment, the frame includes a recessed pocket which facilitates use of ramp for wheel chair access.

Abstract: A frame and suspension for a high ground clearance truck trailer. Independently moving suspension arms are suspended outboard and rearward on opposing sides of the frame, and wheel spindles are cantilevered outboard and below the frame so as to provide an unobstructed empty volume underneath the frame.

Abstract: A low profile chassis and suspension system for a road vehicle. The chassis supports a payload section or cargo compartment, such as for a delivery truck, ambulance, or shuttle bus. The chassis includes a largely planar frame having a top surface which is located beneath the rotational axes of the rear wheels. The wheel suspension system is particularly compact and close to the road surface. A trailing arm-type wheel support supports a stub axle in a cantilevered fashion. A spring urges the wheel support apart from the frame. A planar portion of the wheel support, the wheel support pivot joints, and the spring are located beneath the rotational axis of the wheel. In another embodiment, the frame includes a recessed pocket which facilitates use of ramp for wheel chair access.

Abstract: A low profile chassis and suspension system for a road vehicle. The chassis supports a payload section or cargo compartment, such as for a delivery truck, ambulance, or shuttle bus. The chassis includes a largely planar frame having a top surface which is located beneath the rotational axes of the rear wheels. The wheel suspension system is particularly compact and close to the road surface. In some embodiments each wheel is suspended from the vehicle by a pair of pivotal support arms. Preferably, one arm is located above the other arm, and both arms pivot along pivot axes that are generally perpendicular to the rotational axis of the supported wheel. A spring urges one of the arms apart from the frame. In other embodiments, the spring is placed beneath the rotational axis of the wheel. In some embodiments both of the pivoting support arms are located beneath the rotational axis of the wheel.

Abstract: A low profile chassis and suspension system for a road vehicle. The chassis supports a payload section or cargo compartment, such as for a delivery truck, ambulance, or shuttle bus. The chassis includes a largely planar frame having a top surface which is located beneath the rotational axes of the rear wheels. The wheel suspension system is particularly compact and close to the road surface. In some embodiments each wheel is suspended from the vehicle by a pair of pivotal support arms. Preferably, one arm is located above the other arm, and both arms pivot along pivot axes that are generally perpendicular to the rotational axis of the supported wheel. A spring urges one of the arms apart from the frame. In other embodiments, the spring is placed beneath the rotational axis of the wheel. In some embodiments both of the pivoting support arms are located beneath the rotational axis of the wheel.

Abstract: A wheel suspension system including a wheel support pivotally attached to a vehicle frame at two, laterally-spaced locations, the wheel support being pivotal between an uppermost and a lowermost position. The wheel support is biased to a position intermediate of the uppermost and lowermost positions by a spring. The spring urges apart a spring support of the wheel support from the vehicle frame, the spring support being below the rotational axis of the wheel. The pivotal axes of the pivotal attachments are located below the rotational axis of the wheel.

Abstract: A low profile chassis and suspension system for a road vehicle. The chassis supports a payload section or cargo compartment, such as for a delivery truck, ambulance, or shuttle bus. The chassis includes a largely planar frame having a top surface which is located beneath the rotational axes of the rear wheels. The wheel suspension system is particularly compact and close to the road surface. A trailing arm-type wheel support supports a stub axle in a cantilevered fashion. A spring urges the wheel support apart from the frame. A planar portion of the wheel support, the wheel support pivot joints, and the spring are located beneath the rotational axis of the wheel. In another embodiment, the frame includes a recessed pocket which facilitates use of ramp for wheel chair access.

Abstract: A wheel suspension system including a wheel support pivotally attached to a vehicle frame at two, laterally-spaced locations, the wheel support being pivotal between an uppermost and a lowermost position. The wheel support is biased to a position intermediate of the uppermost and lowermost positions by a spring. The spring urges apart a spring support of the wheel support from the vehicle frame, the spring support being below the rotational axis of the wheel. The pivotal axes of the pivotal attachments are located below the rotational axis of the wheel.

Abstract: A low profile chassis and suspension system for a road vehicle. The chassis supports a payload section or cargo compartment, such as for a delivery truck, ambulance, or shuttle bus. The chassis includes a largely planar frame having a top surface which is located beneath the rotational axes of the rear wheels. The wheel suspension system is particularly compact and close to the road surface. A trailing arm-type wheel support supports a stub axle in a cantilevered fashion. A spring urges the wheel support apart from the frame. A planar portion of the wheel support, the wheel support pivot joints, and the spring are located beneath the rotational axis of the wheel. In another embodiment, the frame includes a recessed pocket which facilitates use of ramp for wheel chair access.

Abstract: A wheel suspension system including a wheel support pivotally attached to a vehicle frame at two, laterally-spaced locations, the wheel support being pivotal between an uppermost and a lowermost position. The wheel support is biased to a position intermediate of the uppermost and lowermost positions by a spring. The spring urges apart a spring support of the wheel support from the vehicle frame, the spring support being below the rotational axis of the wheel. The pivotal axes of the pivotal attachments are located below the rotational axis of the wheel.

Abstract: A wheel suspension system including a wheel support pivotally attached to a vehicle frame at two, laterally-spaced locations, the wheel support being pivotal between an uppermost and a lowermost position. The wheel support is biased to a position intermediate of the uppermost and lowermost positions by a spring. The spring urges apart a spring support of the wheel support from the vehicle frame, the spring support being below the rotational axis of the wheel. The pivotal axes of the pivotal attachments are located below the rotational axis of the wheel.