Compensating for the elongation of large chain or belt drives generally requires installation of two or more tensioning elements on the slack side of the chain. This is no longer necessary with the "Boomerang" tensioner. Because of its bent double arm equipped with two chain wheels or a combination of belt pulleys/flat rollers, the simple design triple compensates for chain or belt elongation caused by aging.
Due to the loop guiding of the chain, elongation is compensated three times.
Key to the Boomerang's success is a ROSTA rubber suspension element. Constructed of four pre-tensioned rubber inserts between the outer housing and the inner square-section tube, offset at an angle of 45º, the suspension element combines the functions of a torsion spring, a pivot bearing, and vibration damper—all in one. The element has no metal-to-metal contacts or friction, so operation is silent and maintenance-free.
Rich Kasprzyk, ROSTA LLC, 2655 Wisconsin Ave., Downers Grove, IL 60515; Tel: (630) 852-7762; Fax: (630) 852-1641; E-mail: email@example.com
There is currently much discussion around the term "platform," which may be preceded by the adjectives "mobile," "wearable," "medical," "healthcare," etc. However, regardless of the platform being discussed, they usually have one key aspect in common: They tend to be wireless. So, why is this one aspect so fairly universal? The answer is convenience.
Everyone has a MEMS story. For most of us it’s probably the airbag that saved our lives or the life of a loved one. Perhaps it’s the tire pressure sensor that alerted us about deflation before we were stranded alone on a dark muddy road.
Bioimimicry is not merely a helpful design tool -- it also encourages designers to think not only about how to solve design problems by imitating nature, but how to make the products, materials, and systems they design more ecologically sound and nature-friendly.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.