Emergency inflatable signal locator

What is this patent about?

’500 is related to the field of emergency signaling and search-and-rescue equipment. It specifically addresses the limitations of ground-based signals, such as flares or flashlights, which are often obscured by terrain, vegetation, or weather conditions. The invention provides a portable, aerial solution designed to be deployed by individuals in distress to increase their visibility to rescue teams from significant distances.

The underlying idea behind ’500 is to utilize a high-altitude, light-emitting marker that functions as a dual-purpose optical and radar signal. By combining a lighter-than-air balloon with a specific geometric profile, the inventor realized that a signal could be maintained at the eye level of search aircraft. The core innovation lies in the balloon's shape, which is engineered to act as a parabolic reflector to amplify the reach of an integrated light source and improve radar cross-section.

The claims of ’500 focus on a self-contained emergency kit that integrates an inflatable reflective body with a specialized concave geometry. The independent claim specifies a balloon having a concave medial depression on its sides, covered by a flexible reflective membrane. This structure houses a light source that generates pulses designed to reflect off the body, all of which is managed by a tether and reel system stored alongside a gas canister within a single carrying case.

In practice, the system functions as a rapidly deployable beacon. When a user is lost or injured, they inflate the balloon using the included helium canister and activate the strobe-type LED. As the balloon ascends to approximately 500 feet, the tether is managed by a reel, which allows the user to retract the device to avoid entanglement in trees or to redeploy it if weather conditions change. The use of a swivel at the tether connection ensures the balloon can oscillate in the wind without tangling the line.

This approach differs from prior art by solving the weight and visibility issues common in spherical balloons. Traditional round balloons often lack sufficient surface area for reflection and tend to be pushed toward the ground by wind drag. By contrast, the rectilinear profile and concave depressions of this invention create a more stable aerial platform that maximizes light and radar return. Furthermore, the integration of the reel into the carrying case provides a level of mechanical control and reusability not found in simple disposable signal balloons.