Invalidity dossier
US 10814398
Controller for chip cutting when processing a rotating workpiece
Current assignee: Fanuc Corp
Added 9/21/2026, 9:35:57 AM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US10814398B2
Title: Controller for chip cutting when processing a rotating workpiece
Patent number: US10814398B2
Assignee: Fanuc Corp (original assignee FANUC CORPORATION; inventor Masashi Yasuda)
Key dates (as listed): Prior art date 2018-02-27; filing date 2019-02-21; publication of US20190265677A1 on 2019-08-29; granted/publication of US10814398B2 on 2020-10-27; anticipated expiration 2039-02-21. Legal status listed as "Expired - Fee Related." Google Patents notes legal status and dates are assumptions, not legal conclusions.
Purpose: The patent addresses a problem in thread cutting where the tool and workpiece remain continuously in contact, preventing efficient coolant circulation and potentially reducing tool life through friction, or degrading machining accuracy through heat-induced deformation of the cutting edge. It also notes drawbacks of vibration-based chip separation, including mechanical damage, noise, accuracy loss, and difficulty of setup. The stated object is to provide a controller having a function of performing thread cutting while cutting chips into pieces.
Plain-language scope: The controller controls a machine tool performing thread cutting on a rotating workpiece by moving a cutting tool pressed against the workpiece according to a machining program. It comprises a cutting-up/cutting-in motion operating condition analysis unit that analyzes operating conditions of a cutting-up/cutting-in motion commanded in the machining program, and a cutting-up/cutting-in motion insertion unit that inserts a motion created from those analyzed conditions into the thread cutting. The insertion unit repeatedly performs, along the thread groove cutting direction, a cycle mainly comprising a cutting-in operation, a cutting-up operation that raises the tool radially to cut chips into pieces, and an operation bringing the tool toward the start position of the immediately preceding cutting-up operation without interfering with the workpiece. Dependent aspects mention constant cutting amount over a path, path-length limits, and handling of a non-interference area.
Source: https://patents.google.com/patent/[US10814398](/patent/US10814398)/en
What the excerpt does not establish: It does not provide full claim text, the complete description, drawing details, or examination history. It does not establish validity, enforceability, claim scope, or the content of cited prior art beyond the names mentioned (e.g., International Publication No. 2016/056526; Japanese Patent Application Laid-Open No. 2015-225518).
Generated 10/1/2026, 10:02:03 PM
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Litigation summary
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PTAB challenges
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Assignment history
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Prior art
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Obviousness
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Extensions
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Derivative works
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