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| Number | Title | Issue Date |
| 8141896 | Tandem suspension for a vehicle A pivot assembly for a tandem suspension is provided which includes a balancer and an elastomeric assembly operable to allow the balancer to rotate about a vehicle chassis. In addition, an elastomeric assembly for a suspension system is provided which includes an el... | 03/27/2012 |
| 7296821 | Equalizer for a suspension system An equalizer for a suspension system for a trailer is configured to absorb or dampen the harsh shocks or vibrations coming off of the leaf springs proximate to a center frame hangar, thus allowing for a “softer” ride. The equalizer utilizes two independent equal... | 11/20/2007 |
| 7249780 | Air assist adaptation for leaf spring suspension systems An air spring and a linear guide are used to boost the effectiveness of a leaf spring suspension system for a motor vehicle. The air spring mounts between the axle and the vehicle frame. The aft end of the leaf spring mounts to the linear guide to allow the leaf spr... | 07/31/2007 |
| 7246808 | Wheel suspension for vehicles A wheel suspension for vehicles that includes leaf spring assemblies mounted in pairs on each side of the vehicle in the longitudinal direction of the vehicle and also at least one damper device mounted on the vehicle in conjunction with at least one wheel axle. The... | 07/24/2007 |
| 7234723 | Bolster spring suspension assembly A bolster spring assembly is adapted for securement to a vehicle having a primary suspension system for securing an axle to the vehicle. The bolster spring assembly is located and secured between the leaf spring over the axle and the undercarriage of the vehicle as ... | 06/26/2007 |
| 7229088 | Shackle assembly A shackle assembly is shown to include a shackle bracket, wear pads, a shackle stop, shackle plates and elastomer bushings. The shackle bracket includes legs forming portions thereof, which serve as contact surfaces for the wear pads and the shackle plates. By provi... | 06/12/2007 |
| 7195272 | Front-axle spring pivot suspension and steering apparatus A vehicle suspension has axle end portions each pivotally coupled to an associated leaf spring and thereby to an associated supporting vehicle frame rail. Control rods are pivotally coupled to the axle at locations below the leaf spring pivots. Desirably, one of suc... | 03/27/2007 |
| 7144031 | Suspension isolator equalizer An isolator for use in a suspension system includes a front shaft and a rear shaft. A front spring arm and a front transitional arm are mounted to the front shaft. A rear spring arm and a rear transitional arm are mounted to the rear shaft. A resilient member is mou... | 12/05/2006 |
| 7144041 | Aluminum hanger and hanger assembly A hanger assembly comprises a pair of hangers; a pair of trailer attachment plates, each attachment plate attached to one of the pair of hangers; and a transverse support member having a first end attached to one of the pair of hangers and a second end attached to t... | 12/05/2006 |
| 7111850 | Wheeled vehicle provided with an oscillating axle and a pair of cylinders for blocking the axle A wheeled vehicle including a chassis; an axle coupled to the chassis to oscillate about a longitudinal axis parallel to a direction of advance of the vehicle; a pair of cylinders disposed between the axle and the chassis for blocking oscillation of the axle; and a ... | 09/26/2006 |
| 6679517 | Retrofit suspension system for a vehicle The present invention is a suspension system for use with a trailer or truck having a frame and front and rear axles. In one embodiment, the suspension system comprises a front hangar having a lower portion, a bearing portion, and an upper portion engaged... | 01/20/2004 |
| 6533299 | Drive axle air suspension A lightweight vehicle suspension which is particularly useful for a drive axle uses V-shaped suspension members mounted vertically above the drive axle. The V-shaped members are pivotally connected to the vehicle frame, and an apex of the a-shape is conne... | 03/18/2003 |
| 6382659 | Load distributing tandem suspension assembly A load distributing tandem suspension assembly for supporting a chassis of a vehicle. Front and rear elongated spring arrangements are connected to each other through an intermediate equalizer arrangement. The front spring arrangement has a leaf spring pi... | 05/07/2002 |
| 6364340 | Wheel lifting method and apparatus A truck trailer having a pair of tandem spaced apart rear axles and a suspension system for supporting the axles from the chassis of the trailer having a pivot member intermediate the axles about which the axles may pivot relatively to one another, the ax... | 04/02/2002 |
| 6206407 | Vehicle suspension system A vehicle suspension system is provided for coupling elongated frame rails to first and second axles, the axles extending in a direction transverse to the frame rails. Each axle has opposed outer end portions projecting outwardly beyond the frame rails. A... | 03/27/2001 |
| 6019384 | Leaf spring suspension system A suspension system for a vehicle includes a frame, a wheel support member, a leaf spring secured to the wheel support member, a first connector for first pivotally connecting one end of the leaf spring to the frame, a torsion spring having a central shaf... | 02/01/2000 |
| 5971654 | Full floating axle rotating caps A device for mounting a leaf spring to an axle housing of a vehicle, in which a cap device receives the axle housing of the vehicle. A liner is positioned inside the cap to permit rotational movement of the axle housing. A pair of U-bolts is mounted on th... | 10/26/1999 |
| 5839750 | Leaf spring wheel suspension system A wheel suspension including a wheel support pivotally attached to a vehicle frame at two, laterally-spaced locations, the wheel support being pivotable between uppermost and lowermost positions, a wheel rotatably mounted to the wheel support, a leaf spri... | 11/24/1998 |
| 5615906 | Tandem axle suspension with leaf spring guided forward axle suspension and torque and torque beam guided rear axle suspension connected by a load equalizing bolster beam The present invention provides a tandem axle suspension of the type disclosed in U.S. Pat. No. 4,741,553, for use with trailer tag axles with structural modifications being made thereto adapting the tandem axle suspension of the present invention for use ... | 04/01/1997 |
| 5522469 | Vehicle traction enhancement device A vehicle traction enhancement device is formed of a suspension attached to a frame of a vehicle, a drive axle mounted on the frame through the suspension, a driven axle mounted on frame, a bracket mounted on the drive axle substantially parallel to the f... | 06/04/1996 |
| 5458360 | Tandem axle suspension with leaf spring guided forward axle suspension and torque beam guided rear axle suspension connected by a load equalizing bolster beam The present invention provides a tandem axle suspension of the type disclosed in U.S. Pat. No. 4,741,553, for use with trailer tag axles with structural modifications being made thereto adapting the tandem axle suspension of the present invention for use ... | 10/17/1995 |
| 5366035 | Rear wheel steering device and method for rear wheel steering A rear wheel steering device is provided in a vehicle with a simple structure in which rear wheels are supported at both end portions of a rear axle housing along a width direction of a chassis in order to drive the vehicle more stably at high speeds. The... | 11/22/1994 |
| 5354091 | Wheeled vehicle suspensions Air-ride suspensions for vehicles include composite leaf springs having fibers embedded in a resin matrix. Air springs are interposed between the leaf springs and the vehicle adjacent free ends of the leaf springs.... | 10/11/1994 |
| 5335934 | Spring hanger assembly for trailer frame A trailer frame comprised of a tongue and longitudinal side frame members extending rearwardly from the tongue. The side frame members are formed of hollow tubing having top, bottom and side surfaces. Cross bar members are positioned between the longitudi... | 08/09/1994 |
| 5092623 | Heavy duty easy loading trailer A trailer is provided having a frame (2) upon which a bed (3) slides. The frame (2) has a wheel and axle assembly (1) and (5) disposed thereon which is connected thereto by a spring hanger assembly (6). The spring hanger assembly (6) is comprised of a spr... | 03/03/1992 |
| 5078420 | Tandem wheel and axle suspension In a tandem wheel and axle suspension for suspending a vehicle chassis, a flexible joint assembly for connecting the underside of each distal end of a fore-and-aft leaf spring equalizer beam to the subadjacent end of a transverse axle comprising a downwar... | 01/07/1992 |
| 5046756 | Wheel axle adjustment assembly A wheel axle adjustment assembly is provided to allow a wheel axle to be adjusted at a plurality of positions. The assembly includes a pair of bearing plates which are advantageously provided with corrugations. The corrugations allow the bearing plate to ... | 09/10/1991 |
| 5037125 | Fully articulated suspension of tandem axles of a vehicle A fully articulated suspension is adapted for linking a frame of a vehicle to axles. To facilitate assembly a C-shaped spring in the form of a plate located in the plane of bending is hinged to axles inside its midmost portion and to the frame through its... | 08/06/1991 |
| 5020824 | Device for mounting a composite material leaf spring A suspension for a vehicle having tandem axles includes a composite leaf spring connected between the axles. The leaf spring is constrained to bend about a transverse axis by a fixed elastic support having a concave, arcuate bottom surface whose center co... | 06/04/1991 |
| 5016906 | Suspension adjustment A tandem axle suspension wherein alignment of one axle relative to the other may be adjusted. The suspension includes a pair of spring hangers attached to each side of the chassis frame and a leaf spring assembly interconnecting each pair of spring hanger... | 05/21/1991 |
| 4995634 | Equalizing suspension arrangement for tandem steering axles with coordinated geometry control of no. 2 steering axle An equalizing suspension arrangement for tandem steering axles. An extended shackle is provided for supporting the forward end of the rear spring (that is the spring supporting the rear steering axle), and this extended shackle is connected at one end to ... | 02/26/1991 |
| 4984817 | Fully articulated suspension of tandem wheels of a transport vehicle A fully articulated suspension of tandem wheels of a transport vehicle having a frame (1) with axles (2) has torque reaction rods (17, 18, 19, 20) linked with the axles, at least one pair of double-arm levers (3), each linked mechanically with the frame (... | 01/15/1991 |
| 4907814 | Self-adjusting bearing A self-adjusting bearing comprises an elongate body portion of compressible, resilient material of truncated conical shape with a central cylindrical bore formed therethrough. A plurality of independent segments of wear-resistant material are secured to t... | 03/13/1990 |
| 4889361 | Composite tractor/trailer beam spring suspension system A suspension system for supporting the body of a heavy-duty vehicle on an axle and wheel assembly comprises a first suspension hanger for attachment to a longitudinally extending vehicle frame, a second suspension hanger for attachment to the vehicle fram... | 12/26/1989 |
| 4886292 | Elastic suspension of a wheeled vehicle An elastic suspension of a vehicle having a frame with at least one axle includes a lamination (3) of leaf springs interposed between the frame (1) and axle (2) and mechanically connected thereto. A plate bracelike spring (4) extends lengthwise of the lam... | 12/12/1989 |
| 4871188 | Wheeled vehicle suspension A suspension for tandem axles of a vehicle comprising a pair of walking beams, one for the right side and the other for the left side of the vehicle, each comprising a composite leaf spring comprising fibers embedded in a resin matrix, the fibers extendin... | 10/03/1989 |
| 4842302 | Lifting bogie for a vehicle The invention relates to a lifting bogie for a vehicle, comprising on both sides of the vehicle a rocker arm (4) which is journalled on a shaft (5) and in one end of which an auxiliary shaft (6) is journalled for a bogie wheel (12). When the bogie is lift... | 06/27/1989 |
| 4813695 | Multi-axle vehicle suspension A multi-axle road vehicle has an equalizing resilient suspension for equalizing the load over the axles of a multi-axle set. The suspension is itself carried on a suspension subframe that is in turn mounted on the vehicle to pivot about a transverse, hori... | 03/21/1989 |
| 4804205 | Vehicle suspension assembly A suspension system for a wheeled vehicle, particularly for off road use, the suspension system comprising a plurality of axle assemblies (26, 35, 44), each carrying wheels (27, 36, 48) at either end with a leaf spring suspension element (28, 37, 45) loca... | 02/14/1989 |
| 4743044 | Dual axle stabilizing device A vehicle suspension system of the type having a load-bearing axial support. The suspension system is provided with leaf-springs coupling the support to wheel axles of the vehicle such that in normal operation the suspension means are pivotable about the ... | 05/10/1988 |
