Abstract: A suspension system for liftable steerable axles has at least one steering knuckle; at least one pistonless bellows air spring actuator (ie., damper air spring); and a steering axle structure that has, at each end, a kingpin housing boss, a kingpin fixed into the kingpin boss, and a pair of steering knuckles that rotate around the kingpin and are supported by the kingpin housing; wherein the steering knuckles are connected at the bottom of each other side to side by a tie rod assembly that respond to each others rotational inputs. The lift axle suspension system further has x-rod control arms (or that is, the respective upper and lower control arms of each side are relatively X-configured or X-disposed relative each other) for improved lateral stability.

Abstract: A suspension system for liftable steerable axles has at least one steering knuckle; at least one pistonless bellows air spring actuator (ie., damper air spring); and a steering axle structure that has, at each end, a kingpin housing boss, a kingpin fixed into the kingpin boss, and a pair of steering knuckles that rotate around the kingpin and are supported by the kingpin housing; wherein the steering knuckles are connected at the bottom of each other side to side by a tie rod assembly that respond to each others rotational inputs; and further having the damper air spring being connected to the steering knuckle so that, given a supplied pneumatic air force, the damper air spring stabilizes and dampens the steering road inputs when in motion.

Abstract: A leaf spring suspension is provided with an air spring to absorb a percentage of the load.

Abstract: A slipper and/or eyed leaf-spring vehicle suspension system is provided with a compliant oversized pivot bushing and a torque rod or control arm, respectively. Each of the torque rod or control arm are provided with at least one over-sized eye bushing-housing into which the compliant oversized pivot bushing is compressed into. The compliant oversized pivot bushing has an elastomeric annulus mounted on a rigid sleeve wherein compliant oversized pivot bushing has an overall outside diameter that is greater to much greater than its width.

Abstract: A knuckle-boom loader trailer has a trailer frame, a heavy equipment package of a knuckle-boom crane and an operator cab mounted on top of the trailer frame, and a walking-beam suspension propping up the trailer frame.

Abstract: Improvements to a sliding sub-frame for heavy-duty vehicle suspensions include torque boxes, an air slider-pin system, and a heavy-duty shear-off nut. In the prior art, all four sliding pins are linked together with bars so if one sliding pin is stuck they are all stuck. Here, each sliding pin has a dedicated air assist bladder and is independent and can release on its own. That way, if one sliding pin is stuck, it is a much easier job to get it unstuck by moving the vehicle. The torque box relates to stress-relief measures of shear strains at critical fastened (eg., bolted) connections. The shear-off nut has a break-neck flanked between a hex head and collet nut. The clearance between the outside sidewall of the collet nut very nearly fully spans the space between the flats of a hex socket for the hex head, thereby providing light on-axis support.

Abstract: A suspension for vans or semi-trailers has a sliding (or slider) frame that can be slid longitudinally between spaced, left and right trailer stringers. The sliding frame is coupled within the stringers for longitudinal sliding between forward and rearward extremes. The sliding frame is formed by a pair of left and right rails spaced by two or three or more cross members. The sliding frame has an even number of independent air-spring support towers. The support towers are welded to the rails, but the cross members are bolted. The air-spring support towers can take semi-funnel shapes to having a lower narrower end forming an air-spring seat, and flaring upwardly from there to upper ends connected high on the rails to funnel the weight of the van or trailer from over a wider area to more of a pinpoint distribution on the air-spring seat.

Abstract: A trailer suspension system has an axle, a pair of frame hanger brackets, dual trailing arm beams, and a spring. The pair of frame hanger brackets are mounted spaced apart underneath the trailer. The dual trailing arm beams are connected rigidly to the axle at one end and resiliently connected to a respective one of the frame hanger brackets with a pivot means bushing at the other end. The spring intermediate the trailing arm beam and the trailer to support the trailer load. Wherein, the axle connection center is the center of the patch that connects the axle to the longitudinal trailing arm beam, thereby reducing the stress on the axle as well as increasing the stability of the suspension system.

Abstract: A trailer suspension system has an axle, a pair of frame hanger brackets, dual trailing arm beams, and a spring. The pair of frame hanger brackets are mounted spaced apart underneath the trailer. The dual trailing arm beams are connected rigidly to the axle at one end and resiliently connected to a respective one of the frame hanger brackets with a pivot means bushing at the other end. The spring intermediate the trailing arm beam and the trailer to support the trailer load. Wherein, the axle connection center is the center of the patch that connects the axle to the longitudinal trailing arm beam, thereby reducing the stress on the axle as well as increasing the stability of the suspension system.

Abstract: A vehicular suspension system has a hanger to attach beneath a vehicle, a rocker pivoted at a first end to the hanger and attached proximate a second end to an axle, a shock absorber extending between the hanger and an intermediate position on the rocker, as well as likely a spring on the rocker's second end to push up against the overhead vehicle. The suspension system incorporates an axle saddle configured for more strongly welding to the axle, as well as a composite construction for the rocker to make a tube and thereby achieve a more strongly welded connection to the axle saddle. The suspension system further incorporates a rocker-to-hanger rocking axis alignment subsystem as well as a shock-absorber protection subsystem.

Abstract: A vehicle suspension system comprises a beam mounted for pivoting movement to a hanger and securely to a vehicle axle where the beam is constructed with a laterally widening base as it extends longitudinally from the pivot mounting to the vehicle axle and with an axle shell securing the beam to the axle where the shell connection to the axle reduces stress on the vehicle axle.