Mitsubishi Materials has been granted a patent for a cylindrical shaft seal packaging sleeve. The sleeve is designed to be inserted into a shaft seal and features chamfered portions and step portions. The step portions have a larger outer diameter than the chamfered portions and are located deeper inside the sleeve. The minimum diameter of the step portion in the insertion end is smaller than the minimum diameter of the shaft seal. GlobalData’s report on Mitsubishi Materials gives a 360-degree view of the company including its patenting strategy. Buy the report here.
According to GlobalData’s company profile on Mitsubishi Materials, ceramic membrane fuel cells was a key innovation area identified from patents. Mitsubishi Materials's grant share as of June 2023 was 1%. Grant share is based on the ratio of number of grants to total number of patents.
Cylindrical shaft seal packaging sleeve with chamfered and step portions
A recently granted patent (Publication Number: US11685030B2) describes a new design for a shaft seal packaging sleeve. The packaging sleeve is designed to be used in combination with a shaft seal and has several unique features.
The shaft seal packaging sleeve is substantially cylindrical in shape and has an inner peripheral surface that comes into contact with the rotation shaft. It has an insertion end portion that is inserted into the shaft seal, and this end portion has a chamfered portion and a step portion. The mounting end portion of the sleeve, which is located at the opposite end, has a larger outer diameter than the insertion end portion and also features a chamfered portion and a step portion. Importantly, each step portion has a larger outer diameter than the corresponding chamfered portion, and they are positioned more towards the axial inside of the sleeve compared to the chamfered portions. Additionally, the minimum diameter of the step portion in the insertion end portion is smaller than the minimum diameter of the shaft seal.
In claim 2, it is mentioned that the maximum diameter of the mounting end portion, on the opposite side of the insertion end portion, is larger than the minimum diameter of the shaft seal. This ensures a secure fit and proper sealing between the packaging sleeve and the shaft seal.
The patent also mentions that the shaft seal packaging sleeve is formed of a cylindrical resin molded article. This material choice provides durability and flexibility to the sleeve, allowing it to effectively perform its function.
Overall, this patent describes a novel design for a shaft seal packaging sleeve that offers improved functionality and sealing capabilities. The unique combination of chamfered portions, step portions, and the use of a cylindrical resin molded article as the material make this packaging sleeve a valuable addition to the field.