US 2026/0257523 A1Published application

Trailer coupler lock system with interchangeable adapter and gravity-actuated coupler engagement

AssigneeDynamic Manufacturing Group LLC

InventorsRonald Lee, II, Anthony Sansone, Bradly Martin

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Abstract

A trailer coupler lock system includes an outer shell, an interchangeable adapter received in an adapter slot, and a receptacle-engaging device movable within a vertical plug channel. In the locked state, the device extends through an opening in the adapter base and into the coupler’s ball-shaped cavity, preventing removal of both the adapter and shell without requiring them to be fastened together. The engaging device may be a gravity-actuated plug with an elongated slot and locking recess, or a spring-biased pin assembly with a pin body, coaxial neck, compression spring, and slidable cap. Both embodiments require key actuation to unlock. The spring-biased version further allows tool-free adapter exchange by simple digital depression of the cap. The shell exterior incorporates hexagonal prism bosses in a honeycomb pattern to resist angle-grinder attack.

Claims20

Dependent claims

A trailer coupler lock comprising:

a shell, the shell including a front, a back, a bottom and a top,
a cove formed in the back of the shell, the cove comprising a concave recess into which a receptacle portion of a coupler may be received,
an adapter engagement slot formed in the back of the shell at the cove, and
a first channel extending from the bottom of the shell to the cove;
and
an adapter removably received in the adapter engagement slot,
the adapter including a base and a coupler flange engagement slot;
and
a receptacle engaging device, the receptacle engaging device being movable in the first channel from an unlocked position to a locked position, and in the locked position extending into a ball-shaped cavity on the bottom of the coupler receptacle, thereby preventing the shell and adapter from being removed from the coupler, and in the unlocked position the receptacle engaging device not extending into the cove;
wherein the adapter and the shell are not required to be mechanically fastened to one another, and the prevention of removal of the shell from the coupler is achieved through the cooperative engagement of the shell, the adapter, and the receptacle engaging device with the coupler.

7 more elements

A security device for a trailer coupler comprising:

a unitary shell body defining a central cavity configured to receive a receptacle portion of a trailer coupler;
the shell body comprising an exterior surface formed with a plurality of contiguous hexagonal prism bosses arranged in a honeycomb pattern;
wherein a distance between opposite corners of each hexagonal prism boss is between 2.0 and 2.75 inches;
and
wherein each hexagonal prism boss extends from a core of the shell body by a depth sufficient to present at least two angled projecting surfaces to a tangential cutting disc having a diameter of 4.5 inches, thereby preventing the cutting disc from maintaining continuous cutting contact with the exterior surface of the shell body.

2 more elements

Dependencies are inferred from the claim text.