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A Drive Nut For Moving A Platform Of A Platform Elevator - EP4232391
The patent EP4232391 was granted to Swift Home Lifts Sweden on Nov 20, 2024. The application was originally filed on Oct 22, 2021 under application number EP21799222A. The patent is currently recorded with a legal status of "Granted And Under Opposition".
EP4232391
- Application Number
- EP21799222A
- Filing Date
- Oct 22, 2021
- Status
- Granted And Under Opposition
- Oct 18, 2024
- Publication Date
- Nov 20, 2024
- External Links
- Slate, Register, Google Patents
Patent Summary
A drive nut for platform elevators that eliminates noise and wear caused by thread misalignment between screw sections. The nut features a specially designed thread profile with a decreasing width lower flank that extends along a controlled portion of the circumference. This design enables smooth passage over the interface between screw sections, preventing chocks and unpleasant noise. The nut is adapted through a controlled wear process that involves multiple passages over the interface, allowing it to conform to the screw thread irregularities.
Patent Family
Patent Oppositions
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Patent Citations (8) New
Patent citations refer to prior patents cited during different phases such as opposition or international search.
Dossier Documents
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
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