A hopper bottom and a belly dump. One trailer.
Hopper-bottom work needs a narrow, controlled stream onto a conveyor or into a pit. Belly-dump work needs a wide-open gate to lay down a windrow. Today that takes two trailers. The DMB-23 is one aluminum hopper with four sliding gates that set the opening, so the same trailer runs as a hopper bottom or a belly dump.
Concept visualization. Geometry is illustrative and not for fabrication.
Two pairs of gates. Any opening in between.
Four rigid sliding leaves sit on two levels under a single hopper, so one trailer works as a hopper bottom or a belly dump. One opposed pair adjusts the width of the opening, the other adjusts its length. Because the leaves move symmetrically, the stream always lands in the same place.
- Hopper bottom for the beltSet the width to the conveyor receiver, then meter the feed by opening length, like a hopper bottom.
- Belly dump for the windrowOpen progressively to a full belly-dump footprint for aggregate, base and rock.
- Sealed separatelyA dedicated sealing step after the gates close, with replaceable wear covers on each leaf.
The problem is the gate.
A hopper bottom meters sand onto a belt but can’t spread a windrow. A belly dump spreads rock but weeps fine frac sand through its clamshell gates and can’t feed a conveyor. So most fleets need both, plus pneumatics and boxes for the sand.
When the sand market slows, the hoppers sit. When paving slows, the belly dumps sit. Fix the gate, and one trailer does both jobs.
Keep the trailer working when the market shifts.
Frac sand, aggregate and construction work rise and fall on different cycles. A trailer that can qualify for more kinds of work spends less time parked.
Belt-ready discharge
A narrow, centered stream for conveyor receivers at transloads and on location, and for dry bulk unloading.
Windrow spread
Open wide for road base, gravel and aggregate laid down in a windrow.
Powered gates, electric tarp
Baseline objectives, so the driver controls the load without climbing on the trailer.
The DMB-23 at work on a DLSAPEX pad.
One trailer, two jobs at once: in hopper-bottom mode it meters onto the DLSAPEX receiving belt, and in belly-dump mode it drops straight onto the pile. Designed alongside our sand system, one company from the truck to the blender.
Both DMB-23 deliveries run at once. Use Pile delivery or Our DMB-23 rigs for a close-up. Concept visualization. Explore the DLSAPEX Sand Solution →
Prove the gate, then build the trailer.
Build it with us.
We’re talking with trailer engineers, fabricators and development partners. Let’s compare notes.
Patent pending. The DMB-23 is a concept in development and is not available for sale. The 3D model and animation show geometric motion only; openings, payload and clearances are design objectives subject to engineering, testing, and legal axle and route limits. No load capacity, flow rate or sealing performance is claimed.