Consumer Products

"Deadman Controls on Lawn Mowers and Snowblowers"
Triodyne Safety Brief
v. 5 #2 (July 1988)

Ralph L. Barnett and Dennis B. Brickman

Consumer Product Safety Commission injury data are examined, and associated failure modes and effects verify the predictions contained in the literature. All failure modes involved ergonomic considerations. Zero mechanical state and its relationship with the current approach to lawn mower and snowblower maintenance are discussed.

"Changing World of Products Liability Law"
Triodyne Safety Brief
v. 6 #1 (March 1990)

Kenneth W. Clarkson and Francisco O. Loriga

This paper highlights changes in products liability law in the fifty states over the last decade.

"Automatic Garage Door Child Entrapment Hazards"
ASME 91-WA-DE-12
. New York, American Society of Mechanical Engineers, 1991

Michael A. Dilich and Gene D. Litwin

The hazard of child entrapment injury sustained under a closing automatic garage door is discussed and a brief history of standards development addressing the hazard is presented. Although safety door reversal systems are provided to protect against entrapment, they sometimes fail to perform properly, usually due to improper installation or maintenance. Two new design concepts are presented which offer improved protection from entrapment injury.

"Friction Sled"
Triodyne Safety Bulletin v. 2 #1 (September 1995)

Claudine P. Giebs, Ralph L. Barnett, and Peter J. Poczynok

Describes the Triodyne Friction Tester, a new device for measuring the slip resistance of footwear against compliant surfaces, as opposed to other slip resistance test devices which measure slip resistance on hard surfaces.

"Portable Luggage Cart Safety: An Application of the Safety Hierarchy"
SME 95-WA/DE 22
. New York, American Society of Mechanical Engineers, 1995

Dennis B. Brickman

Portable luggage carts accommodate large payloads using lightweight structures. Most current designs adopt the bungee cord for rapidly securing and unfastening the load. This element is the primary source of luggage cart injuries because it produces impact hazards that strike the eye. Various countermeasures appear throughout the family of luggage carts. Use of the Safety Hierarchy imposes a discipline for the systematic evaluation and application of safety strategies for mitigating the impact danger.

"Portable Luggage Cart Safety: An Application of the Safety Hierarchy"
Triodyne Safety Abstract v. 1 #1 (September 1995)

Dennis B. Brickman

A summarized version of the preceding paper.

"Extension Ladders: Going Out on a Limb"
Triodyne Safety Bulletin v. 3 #1 (February 1996)

Ralph L. Barnett and Andrew H. Tudor

Sawing off a tree limb in front of you does not conjure up the slightest portent of danger. However, this activity performed while standing on an extension ladder can and has led to the telescoping collapse of the ladder.

"Fall Protection: Minimum Weight Lanyards for Bowhunters"
Triodyne Safety Bulletin v. 4 # 1 (August 1996)

Ralph L. Barnett

Bowhunters wear a safety belt for fall protection when climbing to or hunting from a tree stand. This bulletin focuses on the minimum weight design of the safety lanyard.

"Ladder Slide Out - First Order Analysis"
Triodyne Safety Brief v. 12 # 1 (November 1996)

Ralph L. Barnett

One of the more important collapse modes for straight, combination, and extension ladders is base slide out; the top of the ladder slides down the support wall as the base slips away from it. Various fundamental models have been used to study this behavior. This paper revisits the analytical solutions associated with these models and describes their implications for the analysis, design, and testing of ladders.

"Bungee Cord Danger Analysis"
Triodyne Safety Brief v. 12 # 3 (June 1997)

Dennis B. Brickman, Ralph L. Barnett and Harry R. Smith

The utility of bungee cords is so persistently attractive that they continue to gain popularity. Unfortunately, one of the characteristics of bungee cords is the sudden release of stored energy which results from opening of hooks, failure of the bungee cord and hook connection, inadvertent release of the bungee cord during application, and failure of the structure receiving the hook. The design of personal protection equipment and the evaluation of the danger level related to a released bungee cord require information on hook speed. This paper presents a first order analysis of the maximum attainable speed.

"Infant Crib Failure Analysis,"
Triodyne Safety Abstract v. 2 # 3 (May 1997)

Dennis B. Brickman and Ralph L. Barnett

The full text of this paper was published at the 51st Meeting of the Society for Machinery Failure Prevention Technology and the 12th Biennial Conference on Reliability, Stress Analysis and Failure Prevention in April 1997 and is available from Triodyne Inc. at no cost.

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