Portable Cushion And Method Of Use

What is this patent about?

’687 is related to the field of inflatable cushions, specifically those designed to prevent pressure ulcers (bedsores). These ulcers are a significant problem for individuals with limited mobility, such as paraplegics or bedridden patients, and arise from prolonged pressure on bony prominences. The background involves the need for solutions that relieve pressure on the skin to maintain adequate blood perfusion and prevent tissue breakdown.

The underlying idea behind ’687 is to create a dynamic seating surface that actively redistributes pressure. This is achieved by using a network of inflatable bladder pods , each with its own pressure sensor. A microcontroller monitors these sensors and controls a system of valves and a pump to selectively inflate or deflate individual pods, thereby shifting pressure away from areas of high load.

The claims of ’687 focus on an inflatable cushion with non-uniform pressure, comprising a cover, a top layer, a base, a communication device, a microcontroller, a portable power source, a gas pump, a primary tube, a blow off valve, a plurality of two-way valves, a plurality of secondary tubes, a plurality of pressure sensors, and a plurality of bladder pods. The claims specify the fluid communication between these components and the microcontroller's ability to control the valves and pump based on sensor readings.

In practice, the cushion works by continuously monitoring the pressure distribution across its surface. The pressure sensors provide real-time feedback to the microcontroller, which then activates the gas pump and the appropriate two-way valves to inflate specific bladder pods. Simultaneously, the blow-off valve may be opened to deflate other pods, reducing pressure in those areas. This creates a constantly shifting pressure map that prevents prolonged pressure on any single point.

This approach differs from prior solutions in several ways. Unlike cushions with static pressure distribution or simple alternating inflation/deflation cycles, ’687 uses a closed-loop feedback system to dynamically adjust the pressure profile based on real-time sensor data. This allows for a more personalized and effective pressure relief strategy, potentially reducing the risk of pressure ulcers compared to prior art that lacks such dynamic, sensor-driven control .