How Far Are We from Baymax? Insights from Patent Analysis

Caregiving robots are not a new concept. As early as October 2011, the Nara Institute of Science and Technology in Japan demonstrated a robot capable of assisting elderly individuals with dressing. Yet, despite also being a caregiving robot, Baymax, the medical assistant from *Big Hero 6*, seems strangely like something from another world.

Figure 1: Baymax from Big Hero 6 Subverts the Traditional Image of Caregiving Robots

Scientific Basis of the Inflatable Design

Traditionally, robots have always appeared in settings far removed from people’s daily lives, serving merely to handle heavy, repetitive, and monotonous tasks—such as assembling machinery on production lines or performing emergency rescue operations during disasters. The closest robots have come to our daily lives is vacuuming rooms. Therefore, although Japan’s dressing robot directly participates in people’s daily routines, its implementation still inherits the industrial robot’s image of being built with steel bones and iron frames, invincible and unbreakable.

The traditional image of a steel warrior certainly does not align with Baymax’s positioning as a “gentle caregiver.” The creation of his final soft, warm, and ultra-cute design is thanks to a technological innovation from Harvard University. According to director Don Hall, the team discovered an inflatable robotic arm during their visit to Harvard.

A patent submitted by Harvard University in 2010 introduced the structure of this robotic arm. This is a robot design with a very simple principle. Inflatable channels are formed within an elastomeric body; changing the air pressure in these channels causes the elastomer to deform. When the side walls of the elastomer are made from materials with different deformation coefficients, the direction and magnitude of the deformation can be controlled. Connecting a series of such elastomeric bodies and attaching an air tube that communicates with the inflatable channels creates a complete functional module. This functional module, primarily composed of silicone, serves as the design prototype for Baymax.

(Figure 2: Schematic diagram of the structure from U.S. Patent Application No. 13/885,967 filed by Harvard University)

The advantage of inflatable robots is their ability to provide gentle manipulation, making them suitable for handling delicate objects. Furthermore, they can adjust their volume through inflation and deflation, allowing them to adapt to work environments with varying shapes. In the experimental images provided in the patent, we can see an inflatable robotic hand with a diameter of approximately 14 centimeters gently grasping a small white mouse and lifting it into mid-air. In the movie, Baymax embraces Hiro in his arms, closely resembling the small white mouse held aloft.

(Figure 3: The character design of Baymax is well-grounded in science)

The advantages of the inflatable design in terms of materials and structure enable Baymax to avoid the risk of causing harm to humans during contact and care. In this light, Disney’s understanding of caregiving robots is well-founded in both scientific evidence and practical reality.

How Far Is the Path of AI in Healthcare?

Since the release of Big Hero 6, the heated discussion surrounding Baymax has quickly extended from the entertainment industry to the tech sector, a trend undoubtedly closely tied to two prevailing technological concepts: intelligent machines and mobile healthcare. Given that Baymax’s inflatable structure is feasible, how promising are its prospects in terms of intelligence and medical applications?

Technical statistics are typically derived from patent analysis. However, since disease treatment technologies cannot be patented and thus elude such statistical tracking, we adopt an alternative comparative approach by focusing on measurement technologies for human physiological data—including temperature, heart rate, blood pressure, respiration, blood flow, as well as the shape, dimensions, or motion characteristics of bodily organs.

A statistical analysis of granted invention patents in the United States, Europe, and China reveals that over the past two decades, only 1.74% of all patented technologies in the medical field have involved the use of robots for statistical analysis of physiological parameters. Although this figure reached nearly 3% among patents granted in 2014—representing an increase of more than 70% compared to the average—the absolute proportion remains negligible. This indicates that limited R&D resources have been allocated to the robot industry with medical functionalities. Without the support of patented technologies, the path toward industrialization for this high-tech sector will be exceedingly long.

In the realm of intelligent machines, Gartner’s mid-2014 forecast projected that the industrialization of technologies such as intelligent machines, natural language understanding, intelligent advisory systems, and mobile health monitoring would require at least another 5 to 10 years. These technologies are essential for enabling the perceptual, cognitive, and motor capabilities of caregiving robots.

Apple Watch and Google Glass Pave the Way for Nursing Robots

Technical obstacles can always be overcome; the more insurmountable challenge is likely the psychological barrier. Guided by traditional lifestyle habits, people tend to preserve their privacy and are unaccustomed to prolonged exposure under surveillance cameras. As the “eyes” of caregiving robots, cameras continuously scan, analyze, and record their users’ activities, thereby significantly challenging conventional ways of life.

In addressing these issues, wearable devices can pave the way for care robots to enter ordinary households, as exemplified by Apple’s smartwatch. Unlike traditional electronic products, smartwatches maintain closer physical contact with users, yielding more sensitive information—including human physiological data—and providing lifestyle recommendations such as health analyses. This will alter public acceptance of machines, thereby accelerating the integration of care robots into daily life. Meanwhile, products like smart glasses can help people gradually become accustomed to being under constant camera surveillance. (For the latest updates on internet healthcare startups, please follow the VCBeat WeChat official account: vcbeat. We also welcome interactions on topics of interest, or you may contact us via WeChat to share your startup projects or related research insights.)

This article is published on VCBeat with authorization from the author, Jia Jun, Chief Patent Analyst at PatSnap. The views expressed are those of the author alone and do not represent the position of VCBeat.