Siemens Energy has filed a patent for a pin locking device used to assemble sealing components of a seal cartridge. The device includes a pin body with a longitudinal bore and fixing means for an extraction tool. The pin body has two parts, one for fitting a pin cavity of the first sealing component and the other for fitting a locking cavity of the second sealing component. A spring exerts a force to move the pin body from a withdrawn position to a locked position, maintaining the second part within the locking cavity while the first part remains in the pin cavity. GlobalData’s report on Siemens Energy 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 Siemens Energy, ceramic composite hollow blades was a key innovation area identified from patents. Siemens Energy'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.

A pin locking device for sealing components in a cartridge

Source: United States Patent and Trademark Office (USPTO). Credit: Siemens Energy AG

A recently filed patent (Publication Number: US20230184335A1) describes a pin locking device for sealing components in a seal cartridge. The pin locking device consists of a pin body with a longitudinal bore and fixing means for cooperating with an extraction tool. The pin body is divided into two parts, with the first part fitting into a pin cavity of the first sealing component and the second part fitting into a locking cavity of the second sealing component. A spring exerts a force on the pin body, moving it from a withdrawn position to a locked position.

The fixing means of the pin locking device interact with an extraction tool to compress the spring and keep the pin body in the withdrawn position during assembly. When the interaction is released, the spring moves the pin body to the locked position. The second part of the pin body is smaller in cross-section than the first part, ensuring a secure fit within the locking cavity. The fixing means is a screw thread formed around the inner wall of the pin body.

The patent also describes a seal cartridge designed to provide a seal between a rotatable shaft and a shaft casing. The seal cartridge consists of a set of sealing components that can be assembled and disassembled. The first sealing component, which includes the pin cavity, is secured to the second sealing component using the pin locking device described earlier. The first sealing component can either remain stationary during rotation or rotate with the rotatable shaft.

A method for assembling the seal cartridge is also outlined in the patent. The method involves assembling the sealing components to form a stack and then coupling and locking the first sealing component to the second sealing component using the pin locking device. The pin body is initially locked in the withdrawn position within the pin cavity and is released to move to the locked position, with the first part remaining in the pin cavity and the second part fitted into the locking cavity.

Overall, this patent describes a pin locking device and a seal cartridge that provide a secure and efficient sealing mechanism for a rotatable shaft and a shaft casing. The pin locking device ensures proper alignment and locking of the sealing components, while the seal cartridge allows for easy assembly and disassembly.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies