Ultrasonic Assisted Machining Patents 2026 | PatSnap Eureka
Ultrasonic Assisted Machining Technology Landscape 2026
Ultrasonic assisted machining superimposes 20–40 kHz vibrations onto cutting tools to reduce cutting forces by 10–80% and enable precision machining of nickel superalloys, titanium alloys, and ceramic matrix composites. Active patent filing spans turning, milling, drilling, grinding, and hybrid electro-machining architectures.
UAM: Six Process Categories Unified by Ultrasonic Energy
Ultrasonic assisted machining (UAM) encompasses six distinct process categories in this dataset: ultrasonic vibration-assisted turning (UAT/UVAT), ultrasonic vibration-assisted milling (UVAM), rotary ultrasonic machining (RUM), ultrasonic-assisted drilling (UAD), ultrasonic-assisted grinding, and hybrid electro-discharge/electrochemical variants — all unified by piezoelectric transducer-generated vibrations applied to modify cutting mechanics.
Three core physical mechanisms underpin UAM performance across all process variants: periodic tool-workpiece separation creating an intermittent cutting regime, reduction of friction and heat at the cutting interface through high-frequency micro-oscillations, and enhanced cutting fluid penetration facilitated by ultrasonic cavitation effects. These mechanisms collectively enable sub-micrometer surface finish on materials previously considered extremely difficult to machine.
Core system architecture consistently involves an ultrasonic generator, a piezoelectric Langevin-type transducer, a booster and acoustic horn/sonotrode for amplitude amplification, and a cutting tool or workpiece fixture. Vibration modes include 1D (axial, radial, or tangential), 2D elliptical, and emerging 3D configurations operating at frequencies of 20–40 kHz and amplitudes of 10–20 µm, with high-frequency variants reaching up to 104 kHz.
The dataset spans 45+ years of innovation from 1980 to 2025, with the preponderance of active, enforceable patents concentrated in the 2020–2025 window. In this dataset, RTX Corporation is the most prolific industrial filer, holding at least five active patents, while Indian academic assignees account for four records in the IN jurisdiction filed between 2021 and 2025, signaling growing institutional IP activity in retrieved records.
Filing Activity, Jurisdictions, and Assignee Concentration
Analysis of retrieved patent records reveals US jurisdiction dominance with 10+ records, followed by India (4 records) and EP (4 records). Active enforceable patents are concentrated in the 2020–2025 window, with foundational Inoue-Japax patents from 1980–1982 now fully lapsed.
Patent Records by Jurisdiction — UAM Dataset Snapshot
In this dataset, the US jurisdiction accounts for the largest share of retrieved UAM patent records (10+), followed by India (4) and EP (4), with GB (2 historical), AU (2), and WO (1) comprising the remainder.
↗ Click bars to exploreUAM Patent Filing Activity by Era — Retrieved Records
In this dataset, the 2020–2025 maturity era contains the highest concentration of active enforceable patents, while the 2012–2019 growth era dominates literature publications; the pre-2000 foundational patents are fully lapsed.
↗ Click bars to exploreKey UAM Application Sectors: Aerospace to Nanomachining
Retrieved records identify six principal application domains for ultrasonic assisted machining, spanning high-value aerospace components, precision optical surfaces, medical devices, oil and gas drilling, gear manufacturing, and nanoscale surface texturing — each presenting distinct material challenges that UAM directly addresses.
Aerospace & Defense Components
The dominant application sector in this dataset by citation volume, targeting Ni-based superalloys (Inconel 718, 625, 738LC, Nimonic-90), titanium alloys (Ti-6Al-4V, β-Ti), and ceramic matrix composites in hot-section turbine components. RTX Corporation holds multiple active US and EP patents on ultrasonic aperture machining with closed-loop slurry delivery feedback control (2023–2025). Honeycomb core cutting for aerospace structural panels is specifically addressed in two studies in this dataset.
Aerospace ManufacturingOptical Mould & Precision Surfaces
High-frequency ultrasonic vibration-assisted cutting (UVAC) at frequencies up to 104 kHz enables optical-quality surface finish on hardened steel moulds, infrared materials, and tungsten carbide. Applications documented in 2021 and 2022 publications include spherical optical mould fabrication and quadrilateral microlens array production, representing a shift from standard 20 kHz systems to high-frequency architectures that reduce unwanted vibration coupling.
Precision OpticsMedical & Biomedical Devices
Two distinct sub-applications appear in this dataset: ultrasonic machining for fabricating tissue scaffolds and guided tissue generation surfaces (Rhoades WO patent, 2007), and ultrasonic system integration into surgical instruments including blade resonance frequency control documented in Ethicon Endo-Surgery AU patents from 2002 and 2005. Medical polymer micro-molding via ultrasonic injection molding is also documented in a 2019 academic review covering potential applications in the medical industry.
Medical DevicesNano & Micro Surface Texturing
Ultrasonic vibration-assisted AFM nanomachining on monocrystalline silicon is documented using an integrated quartz crystal microbalance platform (2019). Rotary ultrasonic texturing (RUT) for micro/nano surface texture fabrication on aluminum alloys demonstrates friction coefficient reduction of approximately 20% and oil film bearing capacity increase of approximately 140%, as documented in a 2017 academic review. These results establish UAM as a viable route for tribological surface engineering.
Surface EngineeringKey Patent Assignees in Ultrasonic Assisted Machining (Retrieved Records)
In this dataset, RTX Corporation accounts for the highest concentration of active industrial patents, holding at least five records across US and EP jurisdictions filed between 2023 and 2025. Indian academic assignees — including Saveetha Institute, Guru Nanak Dev Engineering College, and Sanjay Adsul — collectively account for four IN-jurisdiction records in retrieved records, reflecting a distinct academic IP cluster.
Top Assignees by Patent Record Count — UAM Dataset Snapshot (Retrieved Records)
↗ Click bars to exploreRTX Corporation
RTX Corporation is the most active industrial patent filer in this dataset, holding at least 5 active patents across US (multiple filings: 2023 granted, 2025 pending) and EP (2023 pending) jurisdictions. All patents focus on ultrasonic machining of apertures in workpieces with closed-loop slurry delivery feedback control, targeting precision hole drilling in aerospace superalloy components for jet engine and turbine cooling hole applications. The 2025 US pending patent introduces real-time feedback parameter monitoring, representing a move toward sensor-driven adaptive UAM process management.
United StatesIndian Academic Assignees (IN)
Four patent records from IN-jurisdiction assignees filed between 2021 and 2025 in this dataset include Saveetha Institute of Medical and Technical Sciences (2025 pending patent on UVAM for ceramics, glass, and composites), Guru Nanak Dev Engineering College (2021 active patent on modified ultrasonic machining process), and Sanjay Adsul (2022 inactive patent on UVAT tooling fixture for hard machining). This cluster reflects India’s growing academic IP infrastructure in advanced machining tooling, hybrid UAM processes, and vibration-assisted turning fixture design.
India — INFive Innovation Signals Shaping UAM Through 2025
The most recent filings and publications in this dataset (2021–2025) reveal five directional signals: closed-loop adaptive control, UAM of additive manufactured workpieces, high-frequency optical surface generation, UAM for ultra-high-temperature CMCs, and multi-energy hybrid architectures.
Closed-Loop Adaptive UAM Control Systems
RTX Corporation’s 2025 US pending patent introduces real-time feedback parameter monitoring with adaptive slurry delivery control during aperture formation, representing a move from open-loop vibration superposition to closed-loop, sensor-driven process management. The corresponding EP filing (2023) confirms international pursuit of this architecture. This direction addresses the core limitation of conventional UAM — inability to respond dynamically to workpiece material variation or tool wear during machining.
UAM of Additive Manufactured Workpieces
Two 2022 studies document UAM as a post-process or in-process finishing step for AM parts: ultrasonic elliptical vibration-assisted cutting of SLM AlSi10Mg alloy and Ohio University’s 2023 patent on ultrasonic microstructure control during powder-bed fusion. This AM + UAM workflow addresses the well-documented surface quality gap in AM-produced metal parts and has strategic value in aerospace and medical device sectors where AM adoption is growing but surface finish requirements remain a barrier.
1D UAT vs. 2D Elliptical UVAM: Process Architecture Comparison
Click any row to explore further.
| Dimension | 1D Vibration-Assisted Turning (UAT) | 2D Elliptical Vibration-Assisted Milling (UVAM) |
|---|---|---|
| Vibration Axes | Single axis: axial, radial, or tangential | Dual axis: elliptical trajectory via two Langevin transducers phase-shifted 90° |
| Frequency Range | 20–40 kHz standard; up to 104 kHz for HFUVAS variants | 20–40 kHz; dual-transducer phase-locked systems |
| Amplitude | 10–20 µm typical | 10–20 µm per axis; resultant elliptical amplitude varies by phase offset |
| Primary Materials | Inconel 718, Ti-6Al-4V, β-Ti alloys, stainless steel, aluminum alloys | Inconel 718 (micromilling), aluminum alloys, AM AlSi10Mg |
| Cutting Force Reduction | 10–80% depending on material and process parameters | 10–25% in radial milling documented in retrieved records |
| Patent Status | Extensive active patent coverage; RTX holds US+EP cluster (2023–2025) | Under-patented relative to academic literature in this dataset; filing window open |
| Key Application | Turbine cooling hole drilling, deep aperture machining, optical mould turning | Micro-milling, honeycomb core cutting, AM part finishing |
| System Complexity | Single transducer; commercially mature sonotrode designs available | Dual transducer with phase control electronics; higher integration complexity |
Frequently Asked Questions: Ultrasonic Assisted Machining Patents
Standard UAM systems operate at 20–40 kHz with amplitudes of 10–20 µm. High-frequency variants documented in 2021 and 2022 publications reach approximately 104 kHz (HFUVAS), enabling optical-quality surface finish on hard materials such as hardened steel moulds and tungsten carbide while reducing unwanted vibration coupling compared to standard frequency systems.
Retrieved records document cutting force reductions of 10–80% depending on material and process parameters. For radial milling specifically, 2D UVAM achieves 10–25% force reduction. In hybrid US-EDM, a 58% machining time reduction was reported for a 1 mm diameter, aspect ratio 14 horizontal blind hole compared to conventional EDM.
In this dataset, RTX Corporation (United States) is the most prolific industrial filer, holding at least five active patents across US and EP jurisdictions (2023–2025) focused on ultrasonic aperture machining with closed-loop slurry feedback control. Indian academic assignees — Saveetha Institute, Guru Nanak Dev Engineering College, and Sanjay Adsul — collectively hold four IN-jurisdiction records filed between 2021 and 2025.
UAM is applied to nickel-based superalloys (Inconel 718, 625, 738LC, Nimonic-90), titanium alloys (Ti-6Al-4V, Ti-15333, β-Ti alloys), stainless steels, aluminum alloys (including SLM AlSi10Mg), ceramics (Al₂O₃), silicon carbide ceramic matrix composites (SiCf/SiC CMC), hardened steel optical moulds, tungsten carbide, and monocrystalline silicon.
No. The earliest UAM patents in this dataset — held by Inoue-Japax Research Inc. (Japan), filed in GB in 1980 and 1982 — are fully lapsed and inactive. This means the basic principle of superimposing ultrasonic vibration on machining is in the public domain. Active, enforceable IP in this dataset is concentrated in the 2020–2025 window.
RTX Corporation’s 2025 US pending patent introduces real-time feedback parameter monitoring with adaptive slurry delivery control during aperture formation, supported by a 2023 EP filing in the same direction. This multi-jurisdiction active cluster (US + EP) covering adaptive closed-loop ultrasonic aperture machining means any R&D program targeting precision hole drilling in aerospace superalloy components via ultrasonic machining should conduct detailed freedom-to-operate analysis against this portfolio before commercial deployment.
Data and insights on this page are based on a limited patent and literature dataset and are for reference only. Figures may not represent the complete technology landscape.