Mac Trailer Manufacturing, Inc.

Trailstar International, Inc.

Michael A Conny

Scott A Kibler

James A Maiorana

John Morgan

James S Arnold

Dump body with access door

Dump body with angled corner

A dump body apparatus including a dump body having an exterior wall defining a compartment for carrying a load. The exterior wall includes a front wall and first and second sidewalls. A first corner wall extends between the front wall and the first sidewall. The first corner wall is oriented at an obtuse angle relative to one or both of the front wall and the first sidewall. An opening is defined in the first corner wall and is in communication with the compartment. A door selectively closes off access to the compartment and a step may be provided below the door. An angled second corner wall may be provided between the front wall and the second sidewall. The angles of the first and second corner walls provide relatively unobstructed lines of sight for a driver seated in a cab of a vehicle that includes the dump body.

Dump body with included access door

An aerodynamic device includes an inflatable member convertible between a deflated position and an inflated position at a speed certain. When in the inflated position, the inflatable member on the aerodynamic device extends between the cabin wall on a vehicle and a leading wall on a container supported by a trailer towed by the vehicle. The inflatable member fills a gap ordinarily between the cabin wall and trailer to encourage laminar flow as truck hauls trailer through an air stream. The encouragement of laminar flow reduces drag which results in increase fuel economy for the truck's engine, amongst other advantages.

Aerodynamic device for a vehicle

An aerodynamic device for a trailer includes an inflatable member coupled to a rear wall on a trailer adapted to inflate rearwardly therefrom to reduce drag as the trailer is towed forwardly. The aerodynamic device further includes an air intake scoop mounted beneath the rear wall of the trailer in fluid communication the inflatable member for filling the inflatable member with air as the trailer moves forward.

Aerodynamic device for the rear of a trailer

A locking assembly and method of securing a dump truck tailgate to a sidewall of the dump truck, and a truck incorporating the same. The locking assembly includes a pressurized pin mechanism mounted on one of tailgate and the sidewall; and a spool mounted on the other of the tailgate and the sidewall. The spool is engageable with the pin mechanism to lock the locking assembly and secure the tailgate to the sidewall, and is disengageable from the pin mechanism to unlock the locking assembly and release the tailgate from its securement to the sidewall. A hinge assembly is provided on an opposite side of the tailgate from the locking assembly. The tailgate is selectively pivotable relative to the truck bed about a vertical axis extending through the hinge assembly or about a horizontal axis extending through both of the locking assembly and the hinge assembly.

Locking assembly for a side-swing tailgate

A trailer having an enclosed area with an integral toolbox is presented. The trailer includes a bulk tank with at least a first hopper and a second hopper. The first hopper has a first discharge port and the second hopper has a second discharge port. A discharge pipe is connected to the first and second discharge ports. A storage box is formed between and integral with the first hopper and the second hopper to define a storage chamber. A door is mounted on the storage box having open and close positions for respectively providing access to and blocking access to the storage chamber.

Trailer having an enclosed tank area with integral toolbox

Pressurized locking assembly for a side-swing tailgate and a tailgate incorporating the same

Toolbox door and mounting panel

A handrail assembly for a tank trailer and a yoke assembly for the same. Handrail assembly provides a safety device for an operator walking along a top wall of the tank trailer. The handrail assembly includes a top rail, a plurality of vertical members, a safety wire and, sometimes, a bottom rail. Each yoke assembly secures one of the top and bottom ends of the vertical members to either of the top and bottom rails or to a mounting bracket on the tank. Each yoke assembly includes a base member engaged partially in a bore of the vertical member, and a cradle member engaged with an exterior wall of the top or bottom rails or mounting bracket. Base and cradle members are secured together by a pivot pin. Fluid-actuated cylinders extending between the vertical members and the tank move the handrail assembly between collapsed and expanded positions.

Tank trailer having an air actuated handrail assembly

An open-top cargo box for a truck trailer that is selectively coverable with bow-supported tarpaulin system. The cargo box has an interior cavity defined by front and rear walls connected together by a pair of longitudinally extending side walls. Each side wall has an upper horizontal surface defining a plurality of spaced-apart apertures therein. Each aperture has a first cross-sectional shape and a first size. The bows that support the tarpaulin include vertically oriented ends, each of which has a second cross-sectional shape and a second size. The second shape and size of the ends of the bows is smaller than the first shape and size of the apertures. Consequently, if the side walls of the cargo box spread apart under pressure exerted by a load carried in the cavity, the ends of the bows slidably move within the apertures in the side walls in a direction substantially perpendicular to the longitudinal axes of the side walls. The side walls may be reinforced proximate the apertures. Alternatively, each aperture is formed as a bore of an insert that is tightly received in any one of a plurality of holes in the upper surface of the side walls. The inserts may include markers on an outer surface thereof to enable the bore to be correctly aligned relative to the longitudinal axis of the side wall. Preferably, the apertures are oblong or elliptical in shape and the ends of the bows are circular in cross-section so that the ends may move from side to side within the apertures.

Growing community of inventors

Beloit, OH, United States of America

Michael A Conny