<div id="readability-page-1">Tesla is planning to soon reveal its latest and greatest version of the Optimus humanoid robot, and a series of new patents for the hands and arms, with the former being, admittedly, one of the most challenging parts of developing the project. Two new patents, which were coincidentally filed on the same day as the “We, Robot” event back in October 2024, protect Tesla’s mechanically actuated, tendon-driven architecture. The designs relocate heavy actuators to the forearm, route cables through a sophisticated wrist design, and employ innovative joint assemblies to achieve human-like dexterity while enabling lightweight construction and high-volume manufacturing. <h4>Core Tendon-Driven Hand Architecture</h4> The primary patent, which is titled “Mechanically Actuated Robotic Hand,” details a cable/tendon-driven system. Actuators are positioned in the forearm rather than the hand. Each finger features four degrees of freedom (DoF), while the wrist adds two more. <blockquote> Tesla’s Optimus V3 robot hand looks to have been revealed in a new international patent published today. The patent describes a tendon/cable-driven hand: • Actuators in the forearm • Each finger has 4 degrees of freedom • The wrist has 2 degrees of freedom • Tendon-driven… pic.twitter.com/eE8xLEYSrx — Sawyer Merritt (@SawyerMerritt) April 16, 2026</blockquote> Three thin, flexible control cables (tendons) per finger extend from the forearm actuators, pass through the wrist, and connect to the finger segments. Integrated channels within the finger phalanges guide these cables selectively—routing behind some joints and forward of others—to enable independent bending without unintended motion. Patent diagrams illustrate thick cable bundles emerging from the wrist into the palm and fingers, with labeled pivots and routing guides. This setup closely mirrors human forearm-muscle and tendon anatomy, where most hand control originates proximally. <h4>Advanced Wrist Routing Innovation</h4> One of the standout features is the wrist’s cable transition mechanism. Cables shift from a lateral stack on the forearm side to a vertical stack on the hand side through a specialized transition zone. <blockquote> Boom! @Tesla_Optimus 의 3 세대 구조로 추정되는， 로봇 팔 및 관절에 대한 특허가 공개되었습니다。 아티클 작업에 들어가겠습니다。 1 년 넘게 기다려 온， 정말 귀한 특허인데， 조회수 100 만대로 터져줬으면 좋겠네요. @herbertong @SawyerMerritt@GoingBallistic5 @TheHumanoidHub pic.twitter.com/CCEiIlMFSX — SETI Park (@seti_park) April 16, 2026</blockquote> This geometry significantly reduces cable stretch, torque, friction, and crosstalk during combined yaw and pitch wrist movements — common failure points in simpler tendon systems that cause imprecise or jerky motion. By minimizing these issues, the design supports smoother, more reliable multi-axis wrist operation, essential for complex real-world tasks. <h4>Companion Patents on Appendage and Joint Design</h4> Two supporting patents provide additional depth. “Robotic Appendage” covers the overall forearm-to-palm-to-finger assembly, with a palm body movably coupled to the forearm and finger phalanges linked by tensile cables returning to forearm actuators. Tensioning these cables repositions the phalanges precisely. “Joint Assembly for Robotic Appendage” describes curved contact surfaces on mating structures paired with a composite flexible member. This allows smooth pivoting while maintaining consistent tension, enhancing durability, and simplifying assembly for mass production. <h4>Executive Insights on Hand Development Challenges</h4> Tesla executives have consistently described the hand as the most difficult component of Optimus. Elon Musk has called it “the majority of the engineering difficulty of the entire robot,” emphasizing that human hands possess roughly 27–28 DoF with an intricate tendon network powered largely by forearm muscles. He has likened the challenge to something “harder than Cybertruck or Model X… somewhere between Model X and Starship.” <blockquote>Elon Musk shares ridiculous fact about Optimus’ hand demos</blockquote> In mid-2025, Musk acknowledged that Tesla was “struggling” to finalize the hand and forearm design. By early 2026, he stated that the company had overcome the “hardest” problems, including human-level manual dexterity, real-world AI integration, and volume production scalability. He estimated the electromechanical hand represents about 60 percent of the overall Optimus challenge, compounded by the lack of an existing supply chain for such precision components. These patents directly tackle the acknowledged pain points: relocating actuators reduces hand mass and inertia for better speed and efficiency; advanced wrist routing and joint geometry address friction and crosstalk; and simplified, stackable parts visible in the diagrams indicate readiness for high-volume manufacturing. <h4>Implications for Optimus Production and Leadership</h4> Collectively, the patents portray the Optimus v3 hand not as a mere prototype, but as a production-oriented system engineered from first principles. The 22-DoF architecture, forearm-driven tendons, and crosstalk-minimizing wrist deliver a clear competitive edge in dexterity. They align with Musk’s view that high-volume manufacturing is one of the three critical elements missing from most other humanoid projects. For Optimus to become the most capable humanoid robot, its hand needed to replicate the useful and applicable design of the human counterpart. These filings demonstrate that Tesla has transformed years of engineering challenges into patented, elegant solutions — positioning the company strongly in the race toward general-purpose robotics. The post Tesla Optimus V3 hand and arm details revealed in new patents appeared first on TESLARATI.</div>

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Tesla has revealed new patents for its Optimus V3 humanoid robot, focusing on its hand and arm design. The patents, filed on the same day as the "We, Robot" event in October 2024, detail a tendon-driven architecture with actuators in the forearm, allowing for human-like dexterity. Each finger has four degrees of freedom, and the wrist adds two more. The design aims to enhance manufacturing efficiency and address challenges in achieving human-level dexterity. Elon Musk emphasized the hand's complexity, stating it represents a significant engineering challenge for the robot's development.

- Tesla is preparing to unveil a new version of its Optimus humanoid robot, focusing on advanced hand and arm designs protected by new patents.  
- The primary patent details a tendon-driven hand with actuators located in the forearm and multiple degrees of freedom per finger and wrist, aimed at achieving human-like dexterity.  
- These innovations address key engineering challenges for humanoid robotics, positioning Tesla for a competitive advantage in production-oriented robotic systems.