International Paper has been granted a patent for a seal assembly designed to prevent contamination in a sealed chamber. The assembly features a collar with helical threads and a method that utilizes annular rotor and stator members to create dual rotary pumps, facilitating controlled material flow. GlobalData’s report on International Paper gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on International Paper, Fiber-reinforced material joining techniques was a key innovation area identified from patents. International Paper's grant share as of July 2024 was 73%. Grant share is based on the ratio of number of grants to total number of patents.
Seal assembly for preventing contamination in a sealed chamber
The patent US12066109B2 outlines a method designed to prevent contamination within a sealed chamber through a sophisticated mechanical arrangement involving rotatable and fixed components. The method includes the fixed coupling of two annular rotor members to a rotatable shaft, ensuring that both rotational and axial movements are restricted. Each rotor member features helical threads on their outer surfaces, which interact with corresponding stator members fixed to a housing. This configuration creates a sealed chamber and facilitates the operation of two rotary pumps: one associated with the first rotor member and the other with the second. These pumps are engineered to direct materials in opposite flow directions along the rotation axis of the shaft, enhancing the efficiency of material movement while maintaining the integrity of the sealed environment.
Further specifications of the method include the design of the helical threads, which can be either right-handed or left-handed, and the potential for multi-start threads to be utilized. The housing is structured to define the stator members, and the rotor members are designed with openings of differing diameters to accommodate various portions of the rotatable shaft. Each rotor member is equipped with O-rings that create seals against the shaft's outer surfaces, effectively preventing contaminants from entering the sealed chamber at the interfaces. This innovative design not only addresses contamination concerns but also optimizes the functionality of the rotary pumps, making it a significant advancement in the field of sealed chamber technology.
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