Archive for the ‘Recreation’ Category

Ski Binding Safety Part III

3rd September 2010 by John Sedgewick Comments Off

The bones of the leg can take high levels of force without breaking as long as those force levels are applied over a very short period of time. The longer the leg is exposed to an injurious level of force, the more likely it is to break. During a downhill ski run, the legs encounter [...]

Ski Binding Safety – Part II

12th August 2010 by John Sedgewick Comments Off

Exploring how elasticity is a factor in alpine ski binding design and performance is not easy because there is very little written about it, and because few people outside of the ski binding manufacturers have studied it. The very concept of elasticity in ski bindings is unknown to most skiers. To understand it, you must [...]

Ski Binding Safety Part I

9th August 2010 by John Sedgewick Comments Off

Alpine ski binding technology has improved steadily since downhill skiing became a recreational sport after World War II. Bindings quickly went from “bear trap” designs that did not release at all to “safety bindings” that released when the skier fell forward, to bindings intended to release with twisting to the left and right and falls [...]

Rivet Failure Leading to Fall and Personal Injury

5th June 2010 by John Sedgewick Comments Off

Rivets are metal fasteners used to hold things, often other metal parts, together.  Generally, rivets have a head and a shaft. The shaft is passed through pre-drilled holes in the parts to be connected until the underside of the head stops against one of the parts to be connected. The shaft is then “upset” or [...]

Plastic Chair Failure

1st May 2010 by John Sedgewick Comments Off

Molded plastic chairs sell for low prices for a reason: they are not very durable. The points of highest stress, and thus the points of most frequent failure, are where the legs meet the seat and where the back or arms meet the seat. Lawyers and forensic engineers get involved in analyzing plastic chair failure [...]

Six Sigma, Quality Control, and Proving Product Defect

15th April 2010 by John Sedgewick Comments Off

Six Sigma is the most powerful quality control tool ever employed in industry. Developed at Motorola in 1986, this rigorous approach to quality engineering led to rapid improvement in the company’s products. It is believed to have been a major factor in Motorola’s being awarded the inaugural Malcolm Baldridge National Quality Award. Because of the [...]

Post-Sale Duty to Warn and the Subsequent Remedial Measures Rule

6th March 2010 by John Sedgewick Comments Off

A Pennsylvania jury has returned a verdict of $13.5 million in a case involving the death of a child caused by a defective electric fan motor. The motor, which was sold as part of an inexpensive household fan,  overheated and caused a fire. Several years after the fan was made and sold, Lasko Products, Inc., [...]

Toyota Problems Reflect the Limits of Government’s Power to Regulate

1st February 2010 by John Sedgewick Comments Off

The Toyota recall related to sudden acceleration problems is further evidence of the limits of the power of government to regulate big business. According to a recent New York Times story, the National Highway Transportation Safety Administration conducted six different investigations into complaints of sudden and unexpected acceleration in Toyota vehicles, and closed them all with no [...]

Product Defect Verdicts Bigger in 2009

23rd January 2010 by John Sedgewick Comments Off

The Chicago Sun Times and Bloomberg News have reported that the top 5 product liability verdicts returned in 2009 were more than 50% greater than the top 5 in 2008.  Leading the way in size were verdicts against cigarette makers and drug companies. The tension in product liability trials is often around the public perception [...]

Defective Gas Grill

15th January 2010 by John Sedgewick Comments Off

There has been a recall of 10,000 gas grills due to the risk that the rubber hose connecting the gas supply to the burner will melt and rupture. This is a danger in these grills because the hose is too close to the burner. When the hose gets hot, it melts,  gas leaks out creating [...]