The Boler Company

Robert L Cadden

James L Srch

The invention relates to a suspension system for installation between a chassis and dual axles of a vehicle. The suspension system includes an equalizer beam pivotally linking the axles together. A trailing arm support member is pivotally attached to a hanger bracket on the chassis. A suspension saddle is secured to the trailing arm support member to provide pivotal support for an equalizer beam. Air springs are located between the chassis and the trailing arm support member.

Vehicle suspension systems

The invention provides a suspension system ( ) for installation between a chassis having side rail members ( ) and cross frame members ( ) and an axle ( ) of a vehicle. A step spring ( ) is included having a forward generally horizontal section ( ), a rearward generally horizontal section ( ), and a generally vertical section ( ) between and contiguous with the forward and rearward sections ( ) and displacing the rearward section ( ) below the forward section ( ). The leading end of step spring ( ) is pivotally attached to the chassis with a spring ( ) extending between the chassis and the trailing end of step spring ( ). Axle ( ) is pivotally secured to a mounting ( ) on forward generally horizontal section ( ) with the pivot ( ) above axle ( ).

Vehicle suspension

The invention relates to a suspension system (,) for installation between a chassis (,) and dual axles (,) of a vehicle. The suspension system (,) includes an equalizer beam (,) pivotally linking the axles (,) together. A trailing arm support member (,) is pivotally attached to a hanger bracket (,) on chassis (,). A suspension saddle (,) is secured to trailing arm support (,) to provide pivotal support for equalizer beam (,) and air spring (,) located between chassis (,) and trailing arm support member (,).

Suspension adjustment for a suspension for a vehicle having a chassis frame and at least one pair of opposed transport wheels on opposite sides of the fore-and-aft axis of the vehicle, an axle extending between the wheels of each pair, the suspension including a pair of spring hangers attached to each opposite side of the chassis frame, and a leaf spring assembly on each side of the chassis frame interconnecting each pair of spring hangers with opposite ends of the axle in resilient load transfer relationship, each leaf spring assembly having a leaf spring with a spring eye at one end and a spring pin extending through the spring eye and through an aperture in an aperture providing formation rigidly secured to the one of the spring hangers to which the end of the leaf with the spring eye is interconnected, and mechanism for adjusting the fore-and-aft position of at least one end of an axle, the axle end adjusting mechanism comprising a first fastener adjustably fastening a spring hanger associated with an adjustable axle end in a plurality of fore-and-aft positions on the chassis frame, and/or a second fastener adjustably fastening an aperture-providing formation associated with an adjustable axle end in a plurality of fore-and-aft positions on the spring hanger associated with the adjustable axle end.

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 hangers. Each leaf spring assembly includes a leaf with a spring eye at one end and a spring pin extending through the spring eye and through a transverse aperture in an aperture-providing insert rotatably mounted in the spring hanger to which the end of the leaf spring with the spring eye is interconnected. The spring hanger in which the insert is mounted has an upper portion by which it is attached to the vehicle chassis frame and depending portion having a transverse opening in which the insert is rotatably mounted. The depending portion is transversely bifurcated by a slot extending upwrdly into the transverse opening. A horizontal bolt-receiving opening extends fore-and-aft through the depending portion and fore-and-aft through an upwardly extending fore-and-aft slot in the lower portion of the insert. A clamping bolt extends through the bolt-receiving opening. The fore-and-aft slot in the insert straddles the calmping bolt with sufficient upward clearance to permit the insert to be rotated through a substantial angle. The outboard side of the insert has a tool-engageable formation thereon. Since the aperture in the insert is eccentrically located fore-and-aft adjustment between the leaf spring and the chassis may be obtained by rotating the insert.

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Parkdale, Australia

Robert L Cadden