{"id":8018,"date":"2018-03-30T08:00:42","date_gmt":"2018-03-30T14:00:42","guid":{"rendered":"https:\/\/www.ulprospector.com\/knowledge\/?p=8018"},"modified":"2022-04-18T08:03:12","modified_gmt":"2022-04-18T14:03:12","slug":"pe-mobility-designed-elbow-crutch","status":"publish","type":"post","link":"https:\/\/ulprospector.ul.com\/8018\/pe-mobility-designed-elbow-crutch\/","title":{"rendered":"Mobility Designed elbows its way into the crutch market"},"content":{"rendered":"

Anyone who has ever used crutches knows they can be a real pain. In the armpits. In the wrists. In the forearms and elbows. In the shoulders.<\/p>\n

This became a personal issue for Max Younger after his healthy father had knee surgery, contracted a staph infection and ended up having his leg amputated above the knee in August 2008. Max had just graduated with an industrial design degree from the Savannah College of Art & Design in Georgia, and in December that year married his college sweetheart, Liliana, who also earned a design degree from SCAD.<\/p>\n

He saw his father on crutches constantly and was well aware of the discomfort they caused. It was then that Max decided to try to design a better crutch. The traditional, under-arm crutch technology, after all, has been around since the U.S. Civil War in the 1860s.<\/p>\n

In a phone interview, Max recalled how he secured some studio space and started building prototype after prototype with materials from his garage and basement. \u201cWe got a 3D printer and started doing modeling,\u201d he said.<\/p>\n

Several years later, after the birth of their first child, Liliana told Max that she wanted to help him build a company to realize his dream. She took an entrepreneurship business program at the University of Missouri – Kansas City, and told Max that if he developed the product, she would run the company. And so, Mobility Designed LLC<\/a> was born in 2015, with Liliana as co-founder and CEO. And their latest \u201cbaby\u201d is the M+D Crutch<\/strong>.<\/p>\n

\"\"
Max and Liliana Younger, and son Augusto, show off their handiwork
(All photos courtesy of Mobility Designed LLC)<\/figcaption><\/figure>\n

Though he was a business novice, Max did accrue some early manufacturing experience.<\/p>\n

\u201cWhen I was 14, I started working as an apprentice to a mold maker at a statuary company in Kansas City. For five years, during summers and breaks, I made molds \u2013 multipart molds, they\u2019d have slides on them and the like. I learned about drafts and part lines and flashing. It was all the same principles as with steel tooling, but with fiberglass. Some of the molds were as big as me.\u201d<\/p>\n

As a designer, Younger believes in the maxim that \u201cform follows function.\u201d As a result, all elements of his M+D crutch are there for a reason, not just for style or aesthetics.<\/p>\n

\u201cWe knew we didn\u2019t want to use the armpits. We knew we didn\u2019t want to use the hand rests to support weight. So, how else can we do it?\u201d He estimates the ideation process involved going through 1,200 to 1,500 ideas, over several years. They looked at devices you sit on, or kneel on, and more, but through a \u201cnatural filtration\u201d of design ideas, they gravitated to focusing weight placement on the elbows, which Younger says had not been done before.<\/p>\n

Other crutches may describe themselves as elbow crutches, but they really use the forearm to support the weight, he said. Younger focused on creating support for the elbow. They needed some aspect of shock absorption. The final product\u2019s upside-down question-mark shape helps to absorb some shock, and the rubber feet on the crutch also help in that regard.<\/p>\n

\u201cThe feet were really an important material for us to get right. We test our feet here. We have machines that we engineered and built to test durability and friction \u2013 and our friction is about twice the standard of most crutch tips.\u201d<\/p>\n

\"Rubber
Much work went into developing the crutch\u2019s natural rubber tip, to maximize safety<\/figcaption><\/figure>\n

That was great, but they also had to deal with wear \u2014 if it was too soft, it would wear prematurely; if it was too hard, it wouldn\u2019t grip. And then there was the issue of how to deal with temperature differentiation, with how the tip material would react in both hot and cold environments. And how to deal with water, to avoid hydroplaning.<\/p>\n

The typical plastic crutch foot is round, Younger noted, and when it hits a wet tile floor, for example, it easily can slip out from under, causing the user to fall.<\/p>\n

\u201cOur tips are designed not to do that,\u201d he said. By using a tread pattern of various circles on the foot\u2019s surface, the water is dispersed, which minimizes any hydroplaning. Each foot contains a thick piece of natural vulcanized rubber, with additives compounded in to help with abrasion resistance, and continued grip throughout the wear.<\/p>\n

The rest of the elbow crutch also involved a number of key material decisions. It features an aluminum leg and a stainless steel handle tube. For the foam forearm pads, Younger and his team worked with a shoe insole company that works with Nike. The foam incorporates an antimicrobial additive (similar to a silver nanoparticle, but not quite as pricey), he said. But, still, the foam pad is quite an expensive component. It provides not only some shock absorption, but also provides good abrasion resistance, doesn\u2019t slip and doesn\u2019t sweat.<\/p>\n

\"Armpad
The hand grip can swing down and out of the way if not needed<\/figcaption><\/figure>\n

\u201cFiguring out the foam was really a headache for me. Do you want hydrophobic or hydrophilic, open cell or closed cell? If you use hydrophobic, you get a pool of water; if you use hydrophilic, then it absorbs, and you get bacteria issues,\u201d he explained.<\/span><\/p>\n

They ended up using a fabric pattern on the surface that helps with friction and which allows the arm to naturally disperse the moisture.<\/p>\n

The elbow crutch\u2019s arms come in either black or white color, and are molded from glass-filled nylon in Taiwan, where their production tooling also was made. The design team did a lot of finite element analysis on these parts during development to test strength, flexibility and breakage limits. That resulted in them adding much more ribbing to prevent unwanted bending.<\/p>\n

\u201cWe learned in our testing that we needed to have a cradle that raised up. The hinged cradle allows you to raise your hand up to your face, to talk on the phone, or brush your teeth, etc.\u201d<\/p>\n

\"Man
The forearm cradle is hinged and can raise up, giving the user greater functionality<\/figcaption><\/figure>\n

One of the bigger challenges for us was the armbands \u2014 both in terms of materials and in transferring into production.<\/p>\n

\u201cThe glass-filled nylon clips that we\u2019d CNC [computer numerical control \u2013 a cutting machine with a router] would hold up fairly well in our tests, but in our first production runs, we had to replace most of those armbands because they would pop off.\u201d<\/p>\n

The armbands endure a lot of stresses \u2014 impact stresses and the stress of arms being taken in and out repeatedly. A texture on the bands reduces sweating, and helps to facilitate the in-and-out motion by minimizing contact with skin or clothing.<\/p>\n

\u201cWe engineered and built a machine to test both the tensile strength and the shear of the armbands. We literally pulled them apart until they would tear.\u201d<\/p>\n

Getting the durometer exactly right on the flexible bands was a challenge. The team began by using an ethylene-vinyl acetate\u00a0(EVA) resin for the armbands (like that used in mouth guards). But when they switched to nylon for more durable clips, they had to abandon the EVA since it doesn\u2019t bond to nylon. They ended up using an undisclosed thermoplastic rubber for the armbands.<\/p>\n

Shrink rates of materials also proved to be a problem \u2013 at least for a design student who was a neophyte embarking on a manufacturing project. He learned the hard way you couldn\u2019t just swap out one material for another<\/a>.<\/p>\n

Like many entrepreneurs, Younger also learned that designing a good product is perhaps only 10 percent of what\u2019s involved in creating a successful company.<\/p>\n

\u201cBack then,\u201d Younger admits, \u201cI knew design really well, but I didn\u2019t know marketing.\u201d<\/p>\n

In mid-2016 a video of the M+D Crutch went viral, and it altered the arc of the company, which had to begin thinking globally a lot sooner than had been planned.<\/p>\n

\u201cWe didn’t even have a website that could take orders at that time,\u201d Max said, and so they had to build an e-commerce-ready website over the weekend.<\/p>\n

They sold out their first two modest production runs before they had manufactured a single product, and shipped their first crutches in January 2017. Mobility Designed now holds three design patents, and has three pending utility patents, along with foreign filings in several countries, he said.<\/p>\n

Younger said Mobility Designed is busy working on future versions of the product. For instance, they have received a lot of enquiries for crutches to fit young children (6 to 8 years old), and so have been developing a scaled-down version. There also is demand for a number of accessories, such as different feet attachments (e.g., an ice foot, a beach foot, etc.).<\/p>\n

The firm, meanwhile, is touting its product\u2019s performance, based on a user survey it conducted last summer. It claims that 71 percent\u00a0of M+D Crutch users reported that they “do not hurt at all” in their hands\/wrists when using the product compared to only 15 percent reporting\u00a0the same result with other crutches (including both traditional and forearm crutches). M+D Crutch users also reported a decrease in pain in the forearm\/elbow and the shoulders compared to that with other crutches.<\/p>\n

Last summer, Liliana stepped aside as the firm\u2019s start-up CEO (while remaining on the board), in favor of an experienced executive, Dan Alcazar, whose role is to serve as a growth catalyst.<\/p>\n

It appears to be working. M+D Crutches cost $250 a pair; single crutches \u2013 billed as a \u201ccane alternative\u201d \u2013 are priced at $125 each. The firm is selling product now in the U.S., Canada, Mexico, United Kingdom, United Arab Emirates, Australia, Romania, Japan and several European Union countries, including Italy and Germany.<\/p>\n

—–<\/p>\n

See a brief promo video of M+D Crutch in action at http:\/\/bit.ly\/MDCrutch_video<\/a> or a June 2017 Kansas City television interview with Max and Liliana at http:\/\/bit.ly\/KCL_interview<\/a>.<\/p>\n

\n

Did you know you can use Prospector\u00ae<\/sup> to search for medical plastics?<\/strong><\/h3>\n

The Unlimited subscription plan gives you access to specialty material filters for 3D printing materials, biopolymers, medical plastics, and more.<\/p>\n

Subscribe today!<\/strong><\/a><\/h3>\n
\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Anyone who has ever used crutches knows they can be a real pain. In the armpits. In the wrists. In the forearms and elbows. In the shoulders. 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He has broad global experience and for more than 35 years has worked as a journalist, editor-in-chief, publishing executive and key connector of like-minded parties. He has launched successful publications and C-level events on three continents. While with Crain Communications Inc., he oversaw the relaunch of the 100-year-old European Rubber Journal in London and helped to start Urethanes Technology magazine there. \u00a0In 1988 Bob returned to Akron, Ohio, to serve as founding editor of Plastics News, an award-winning, weekly business newspaper. In 2005 he oversaw the editorial launch of the bilingual (Chinese and English) PN China e-newsletter and website. For more than a decade at PN he also held the titles of associate publisher, editorial director and conference director, and most recently served as business development director. A long-time affiliate member of the Industrial Designers Society of America, Bob has organized numerous design-focused events, earned a Personal Recognition Award from IDSA in 2013, and constantly strives to help bridge the gap between the design and manufacturing communities. In 2014 he left Crain and created RC Grace LLC in Akron, Ohio, as a consultancy that aims to help companies to enhance their branding and market presence, find business partners, connect with design resources (here or in Asia), secure funding and advance their growth initiatives. Email Bob or visit his website at www.rcgrace.com to learn more about how he can help you.","sameAs":["http:\/\/ulprospector.com"],"url":"https:\/\/ulprospector.ul.com\/author\/robert-grace\/"}]}},"authors":[{"term_id":1244,"user_id":23,"is_guest":0,"slug":"robert-grace","display_name":"Bob Grace","avatar_url":"https:\/\/ulprospector.ul.com\/media\/2017\/10\/Robert-Grace_avatar_1508791447-96x96.jpg","0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""}],"_links":{"self":[{"href":"https:\/\/ulprospector.ul.com\/wp-json\/wp\/v2\/posts\/8018","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ulprospector.ul.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ulprospector.ul.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ulprospector.ul.com\/wp-json\/wp\/v2\/users\/23"}],"replies":[{"embeddable":true,"href":"https:\/\/ulprospector.ul.com\/wp-json\/wp\/v2\/comments?post=8018"}],"version-history":[{"count":0,"href":"https:\/\/ulprospector.ul.com\/wp-json\/wp\/v2\/posts\/8018\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ulprospector.ul.com\/wp-json\/wp\/v2\/media\/8021"}],"wp:attachment":[{"href":"https:\/\/ulprospector.ul.com\/wp-json\/wp\/v2\/media?parent=8018"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ulprospector.ul.com\/wp-json\/wp\/v2\/categories?post=8018"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ulprospector.ul.com\/wp-json\/wp\/v2\/tags?post=8018"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/ulprospector.ul.com\/wp-json\/wp\/v2\/ppma_author?post=8018"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}