{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9691642","patent":{"patent_number":"US-9691642","title":"Device for measuring undulation of brake disc in railway wheel with brake discs","assignee":null,"inventors":[],"filing_date":"2012-09-14T00:00:00.000Z","publication_date":"2017-06-27T00:00:00.000Z","cpc_codes":["H01L","H01L"],"num_claims":4,"abstract":"A device for measuring undulation of a brake disc in a railway wheel with brake discs includes a wheel support supporting a hub's bore of the railway wheel; a first displacement gauge for measuring a height displacement of the brake disc frictional surface for one round to follow rotation of the wheel support; and a second displacement gauge for measuring a height displacement of a railway wheel rim surface for one round to follow rotation of the wheel support. A computing unit calculates a difference between maximum and minimum values of the height displacement of the frictional surface by acquiring measurement data from the first displacement gauge, calculates a difference between the maximum and minimum values of the height displacement of the rim's surface by acquiring measurement data from the second displacement gauge, and derives a difference between the both calculated differences as brake disc undulation."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Device for measuring undulation of brake disc in railway wheel with brake discs","description":"A device for measuring undulation of a brake disc in a railway wheel with brake discs includes a wheel support supporting a hub's bore of the railway wheel; a first displacement gauge for measuring a ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9691642","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9691642","citation_suggestion":"Patentable. \"Device for measuring undulation of brake disc in railway wheel with brake discs\" (US-9691642). https://patentable.app/patents/US-9691642","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9691642","json":"https://patentable.app/api/llm-context/US-9691642","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T10:58:01.367Z"}