Abstract:
An improved tilting trailer suspension is disclosed, including hitch means for attachment to a tow vehicle, comprising generally a main frame including a tongue portion, having left and right side swingarms pivotally mounted to main frame, said swingarms providing a pair of forwardly mounted stub axles oriented outwardly for wheel attachment. A second frame is provided consisting of parallel frame members pivotally mounted to the rearward end of said swingarms, extending forward over the swingarms and providing latch means for detachable connection to the tongue of the main frame. A spring device is provided above the stub axles between the swingarm and the second frame members to provide resilient support to the load through the wheels. Tilting is accomplished by unlatching the secondary frame from the tongue portion of the main frame allowing the swingarm to pivot about its connection to the main frame. The rearward end of the load-carrying deck drops to the ground, while the secondary frame pivots about the axis of the wheels and assumes an upwardly extending attitude.
Abstract:
A leveling valve (30) is provided, of the type that lets air flow from a pressured source (40) into an airbag (24) and that lets air flow from the airbag to the atmosphere, to maintain a predetermined airbag height, which avoids jacking wherein the height of the airbag repeatedly increases as the vehicle moves over a rough road. A pair of inserts in the leveling valve are selected so the passage of the insert that passes pressured air to the airbag is made significantly smaller in diameter than the passage of the insert that passes air from the airbag to the atmosphere.
Abstract:
A pneumatic suspension system for a vehicle providing minimum pneumatic spring stiffness to minimize frame beaming in the vehicle frame. In one embodiment of the invention, the pneumatic suspension system has a first pneumatic spring connected to a first axle and to the frame. A second pneumatic spring is connected to the second axle and to the frame. The first and second pneumatic springs contain pneumatic fluid. A conduit containing pneumatic fluid is in fluid communication with the first and second pneumatic springs. The conduit allows the fluid to move between the first and second pneumatic springs. The pneumatic fluid in the conduit has a fluid resonant frequency. The first and second pneumatic springs and the conduit define a system having a variable stiffness dependent upon an input vibration frequency. The input vibration frequency is a predetermined fraction of the fluid resonant frequency. The pneumatic conduit is sized so the predetermined fraction of the fluid resonant frequency corresponds to the frame beaming frequency, thereby providing minimum stiffness of the system at the frame beaming frequency.
Abstract:
A tandem wheeled carriage of heavy, very strong steel construction capable of lifting 5 to 30 or more tons of load and transporting the same over difficult roadways, wherein a laterally spaced pair of lift devices is provided on the carriage and adapted to be connected to laterally spaced supporting beams of the load, wherein each lift device is operable independently of the other to selectively lift or lower either or both sides of the load to avoid obstacles, and wherein a steering mechanism is provided to synchronously pivot all wheels of the tandem thru a steering angle whereby the rear of the load can be steered straight ahead or also in lateral directions to avoid obstacles and to allow maneuvering of a long load around corners which are too sharp for conventional transport devices.
Abstract:
A vehicle suspension system having a central beam formed with a mounting flange on each side thereof. The beam is pivotally mounted to a suspension frame at one end, and rigidly attached to an axle at another end along substantially the entire length of the axle. A control arm is pivotally mounted to each mounting flange at one end, and to the suspension frame at another end whereby the pivot axis of the center beam and the control arms are axially aligned. Additionally, the pivot connection of the central beam provides one or two bushings which may have a constant spring rate, or which may include a spring rate which varies in the vertical and horizontal direction. In a second and third embodiment, a lift mechanism is provided for raising the axle from a ground engaging to a non-ground engaging position.
Abstract:
A retractable and extendable wheel assembly for mounting to a vehicle at wheel positions of the vehicle. The assembly comprises an axle shaft on which a wheel having a central axis can rotate, and a strut having a first end pivotally mounted at a first strut mount site to the axle shaft and a second end pivotally mountable at a second strut mount site to the vehicle. Additionally, the assembly includes an inflatable and deflatable air ram having a first end pivotally mounted to the first end of the strut and a second end pivotally mountable to the vehicle at an upper ram mount site substantially directly above the axle shaft. The second strut mount site is situated forward or rearward from the upper ram mount site. Release of air from an inflated air ram results in a retraction of the ram and the vehicle descends. Simultaneously, the strut pivots to thereby allow the vehicle to descend preferably a distance sufficient to bring the base of the vehicle at a level substantially equal to the center axis of the wheel. Inflation of the air rams restores the vehicle to its original height for road travel. Thus, cargo can be safely loaded and unloaded since ramps or other devices for vertically raising or lowering such cargo can be eliminated.
Abstract:
A vehicle suspension system having a pair of hanger brackets and a pair of beams. A first end of each beam is attached, via a bushing sleeve to each hanger bracket, and an axle is rigidly attached to the second end of each beam. Each beam is manufactured from a plurality of layers of laminate material which extend circumferentially around the axle and the bushing sleeve. An adhesive layer extends between the bushing sleeve and axle, and the layers of laminate material, for securing the bushing sleeve and axle to the beam. Inasmuch as the laminate material and adhesive have a relatively low modulus of elasticity, these materials flex in response to movement of the axle, thereby assuring that the connection between the laminate beam and the axle remains stable, even as the axle moves in response to forces acting thereon. In another embodiment of the invention, each beam is integrally formed with an air spring piston. In another embodiment of the invention, a parallelogram suspension is provided with a pair of parallel and spaced-apart control arms manufactured of laminate material. Alternatively, the control arms of the parallelogram-type suspension may be integrally formed with a stabilizer bar extending therebetween. In alternative embodiments, a pair of air spring pistons may be mounted on the stabilizer bar, substantially reducing the weight and cost associated with the manufacture and operation of air spring suspension systems.
Abstract:
A frameless end dump trailer has one or more rotating structures placed in its subframe and suspension area in order to permit the use of a single point suspension in a tandem axle configuration in an unrestricted rotation mode with the option to engage the rotating structure to severely limit the rotation of the single point suspension.
Abstract:
A vehicle suspension system having a central beam formed with a mounting flange on each side thereof. The beam is pivotally mounted to a suspension frame at one end, and rigidly attached to an axle at another end along substantially the entire length of the axle. A control arm is pivotally mounted to each mounting flange at one end, and to the suspension frame at another end whereby the pivot axis of the center beam and the control arms are axially aligned. Additionally, the pivot connection of the central beam provides one or two bushings which may have a constant spring rate, or which may include a spring rate which varies in the vertical and horizontal direction. In a second and third embodiment, a lift mechanism is provided for raising the axle from a ground engaging to a non-ground engaging position.
Abstract:
A shock absorbing auxiliary wheel for a mobile home with a set of wheels positioned on a lower surface thereof. Further provided is at least one auxiliary wheel assembly positioned behind the wheels of the mobile home. The wheel assembly is adapted to engage the ground and absorb any shock associated with such engagement.