Outdoor junction box

What is this patent about?

’227 is related to the field of outdoor junction boxes, specifically those used for routing electrical cables from external rooftop devices, such as solar panels, into the interior of a structure. Traditional exterior boxes often suffer from poor integration with roofing materials, leading to water pooling, leaks, and complex installation requirements. These legacy systems frequently rely on fixed conduit locations or pre-punched knock-outs that limit placement flexibility and require installers to navigate around structural rafters blindly.

The underlying idea behind ’227 is to provide a highly adaptable, weather-resistant enclosure that simplifies the alignment between the rooftop entry point and the internal structural layout. By utilizing a system of concentric circular grooves on both the flashing and the internal floor of the housing, the invention provides a visual and physical guide for drilling entry holes anywhere within a safe, designated zone. This allows the installer to shift the penetration point to avoid rafters without moving the entire junction box, while ensuring the exterior seal remains intact.

The claims of ’227 focus on a junction box assembly featuring a flashing and a housing where the bottom portion of the housing and the flashing define aligned, concentric circular grooves of substantially similar diameters. These grooves serve as indicators for suitable hole positions and fastener locations. The independent claims further specify a housing geometry with a pointed first end oriented toward the flashing edge to divert fluid, and the use of pre-marked dimples on the sidewalls to guide the drilling of lateral cable entries.

In practice, the junction box is often manufactured as a non-conductive unibody piece, which eliminates the need for electrical grounding and prevents corrosion. The housing is designed with a pentagonal or similar multi-sided profile, where the leading 'v-shaped' end acts as a prow to shed rain and snow melt. To further enhance weatherproofing, some embodiments include eaves that extend from the sidewalls to direct water away from the housing's base and onto the surrounding shingles.

This approach differs from prior solutions by moving away from restrictive, pre-determined knock-outs in favor of a universal drilling zone defined by the circular grooves. While conventional boxes often have lids that overlap the base in a way that traps debris or allows wind-driven rain to enter, ’227 utilizes a top-mounted opening with a threaded or gasketed lid. This configuration, combined with the specific angular orientation of the sidewalls, ensures that the box remains environmentally sealed while offering significantly more mounting flexibility on uneven or obstructed roof surfaces.