prosthetic
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Rocket-powered mechanical arm might boost prosthetic tech
A group of researchers at Vanderbilt have built a mechanical arm that outperforms traditional battery-powered prosthetics the old-fashioned way: by strapping on a couple rocket motors. The arm, which the team built for DARPA's Revolutionizing Prosthetics 2009 program, relies on a modified miniature version of the same rocket motors the space shuttle uses to reposition itself in space: hydrogen peroxide is burned in the presence of a catalyst to produce pure steam, which is then used to move the arm. Unlike the batteries in traditional arms, which die quickly, a small canister of hydrogen peroxide concealed in the arm can last up to 18 hours, and provides about the same power and functionality of a human arm. Cooler still is the method the arm deals with waste heat and steam: just like a regular arm, it's allowed to filter up through a permeable skin, producing "sweat" -- the same amount of perspiration you'd get on a warm summer day, according to the team. Check a video of the arm in action at the read link -- it's even niftier than it sounds.
iWalk to release PowerFoot One prosthetic foot
It looks like some researchers at MIT and Brown University are about to see the fruits of their labor become commercially available, with upstart iWalk set to release the PowerFoot One prosthetic foot jointly developed by the two. Unlike similar devices, the PowerFoot One uses "tendon-like" springs and an electric motor to help propel the person forward, which supposedly reduces fatigue, improves balance and gives the wearer with a more fluid gait. A mix of sensors and specialized control algorithms also ensure that the person stays balanced while walking on slopes or stairs. While there's no word on what it'll cost, it should be commercially available sometime next summer.[Via Gadget Lab]
UK canine equipped with prosthetic paw
Although we've certainly come across prosthetics with names similar to that of a fun-loving canine, we don't believe we've ever seen a pup actually become the receipiant of one. Nevertheless, the Surrey-based Belgian Shepherd (named Storm) had to undergo a leg amputation due to an agreesive tumor, but rather than allowing it to live out its life minus a limb, Noel Fitzpatrick decided to operate further. Now, Storm has reportedly become the "world's first pet to be fitted with a prosthetic paw," and moreover, the device has actually been installed in a manner that will allow skin to "grow into the metal." Best of all, the veterianarian hopes that "it will act as a model for human amputees," and if this approach gains traction, it could provide hope for humans in the future "without feet or hands."[Via Shiny Shiny]
Otto Bock's prosthetic C-Leg cleared for battle
It's been quite a while since we've heard anything new on the C-Leg, but German firm Otto Bock has now unveiled a sleeker, stronger, and more military-approved version for those in need of a new leg. The microprocessor-controlled knee joint is "the standard prosthesis issued to US fighters who have lost a leg above the knee," offers up a number of "modes" to best suit your current activity, and includes a wireless remote for switching between those modes. The intelligent system within takes data samples of your gait 50 times per second in order to best adapt to your needs, and the internal hydraulics promise "optimal response" no matter how strenuous or demanding the chore. Of course, buying a leg that seemingly puts these natural ones to shame won't run you cheap, as the newest C-Leg will reportedly cost somewhere in the $30,000 to $40,000 range to have it delivered and fitted.[Via Wired]Read - C-Leg used on American soldiersRead - Product Page
Non-robotic "X-Finger" replaces lost digits
An inventor with no medical background looks to have already made quite a name for himself with his X-Finger prosthetic device, which gives folks that have lost fingers a full range of motion without relying on robotics. To control the device, the wearer simply pushes against a lever with the remaining portion of their finger, which sets the knuckles into motion, apparently providing enough force to hold a coffee cup or clutch a golf club. While inventor Dan Didrick's already churning out 100 fingers every 45 days, according to The Naples Daily News, he's apparently far from meeting the demand, for which he says he needs about $11 million in funding. Presumably, that'd also help reduce the cost of the mechanical digits, which currently run a cool $10,000 per finger.[Photo courtesy of Lexey Swall / Naples Daily News]
Dean Kamen's robotic prosthetic arm gets detailed on video
While you'd heard the whispers of a robotic prosthetic arm being crafted by Dean Kamen and his engineering colleagues, very little details have since surfaced on the project. Thankfully, a video was captured during a recent conference in Honolulu, Hawaii where Dean was addressing the FIRST Robotics competition. During the speech, however, he segued (ahem) into a brief glimpse at what's been going on behind the scenes with the device. Shown as "Gen X - Separate Exo Control," the robotic arm was seen demonstrated by team members grasping a water bottle from a friend, picking up an ink pen and turning the wrist over in order to write, and even scratching his nose. Kamen explained that haptic response was paramount, and the "fully completed" prototype sports 14 degrees of freedom (and actuators) and weighs less than nine pounds. Click on through for the captured demonstration.[Via BoingBoing]
MIT gurus developing bionic feet / ankles
Leave it to the brilliant minds at MIT's Biomechatronics Lab to crank out yet another bionic limb, as a newfangled mechanical foot / ankle combo is apparently on the minds of more than a few of its researchers. In a recent patent application, the team describes an "artificial foot and ankle joint" consisting of a "leaf spring foot member," flexible elastic ankle, and an actuator motor that applies force to the ankle. Aside from sporting a fairly intelligent system to improving one's gait, it also boasts a built-in safety feature that prevents foot rotation beyond a specified angle, and the internal sensors can also activate the motors at different intervals depending on the surface in which one is walking. The prosthetic feet join a horde of other bionic limbs and appendages meant to make life as an amputee a fair bit easier, and as terrific as this here invention sounds, we're betting the Olympic committee dashes your hopes of illegally obliterating a few running records by barring these from basic competitions.[Via NewScientistTech]
Bionic hand touts can-crushing abilities
Joining the arm, eye, ear, and dolphin (saywha?), the latest bionic creation to come from the doors of the Tokyo Institute of Technology boasts some 33-pounds of crushing power, which could make the Power Glove look a bit weak in comparison. Touted as the "world's first electromechanical prosthetic hand with a grip strong enough to crush an empty beverage can," the creation reportedly weighs a hair over 300-grams and features about half the strength found in the average male hand, but it can extend and flex its fingers in around one second, making sure that the wearer is still a formidible opponent in thumb wars. Unlike similar iterations, however, this rendition utilizes a system of pulleyed cables that run through the fingers, and if all goes as planned, eventual wearers will be able to control the machine by flexing other muscles via "myoelectric control technology." Click on through for a video demonstration.[Via Pink Tentacle]
