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Retractable energy absorbing webbing and method of manufacturing same

a technology of energy absorption and webbing, which is applied in the direction of safety belts, weaving, transportation and packaging, etc., can solve the problems of people's forward movement, people's risk of falling and injury, and people at elevated positions above a floor or other relatively lower surface,

Inactive Publication Date: 2013-09-19
YKK CORP OF AMERICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

People at elevated positions above a floor or other relatively lower surface are at risk of falling and injury.
For example, workers and other personnel who have occupations that require them to be at elevated positions, such as on scaffolding, are at risk of falling and injury.
If a person is subjected to inertia due to a vehicle's sudden stop, the load limiter limits the person's forward movement when the load limiter is straightened.
With typical retractable lanyards devices, however, the person's movement is stopped rather abruptly and the person is subjected to the shock force of the abrupt stop.
Moreover, existing retractable lanyard devices are bulky, heavy, and costly.

Method used

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  • Retractable energy absorbing webbing and method of manufacturing same
  • Retractable energy absorbing webbing and method of manufacturing same
  • Retractable energy absorbing webbing and method of manufacturing same

Examples

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Embodiment Construction

[0014]Certain embodiments of the invention provide webbings 10 that are suitable for use in retractors, such as retractor 12 shown in FIG. 1. As illustrated in FIG. 1, because webbing 10 is generally flat, webbing 10 is capable of being received within retractor 12 and of being retracted in and out of retractor 12.

[0015]As shown in FIG. 2, webbing 10 comprises elongation yarns 14 and ground yarns 16 that are interwoven together. In some embodiments, ground yarns 16 are nylon, polyester, Kevlar, or any other high modulus, high tenacity yarn or other suitable materials that are relatively higher strength and that do not shrink or shrink substantially less than the elongation yarns 14 during heat treatment. For example, in some embodiments, the ground yarns 16 have a strength of at least 5,000 pounds tensile strength. In other embodiments, the ground yarns have a nominal breaking strength of greater than 5,400 pounds and, in some embodiments, have a nominal breaking strength exceeding ...

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Abstract

Energy absorbing webbings that are generally flat and that have a controllable elongation distance are provided. The webbings are comprised of elongation yarns, such as partially oriented yarns (POY), and ground yarns. In certain embodiments, because they are generally flat, the energy absorbing webbings are suitable for use in retractors. Also provided are processes of manufacturing generally flat, energy absorbing webbings. In certain embodiments, the webbings are subjected to heat using first and second set of rollers with various feed ratios.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application is a divisional application of U.S. patent application Ser. No. 12 / 855,341 titled “Retractable Energy Absorbing Webbing and Method of Manufacturing Same” filed Aug. 12, 2010, the contents of which are incorporated herein by this reference.BACKGROUND OF THE INVENTION[0002]People at elevated positions above a floor or other relatively lower surface are at risk of falling and injury. For example, workers and other personnel who have occupations that require them to be at elevated positions, such as on scaffolding, are at risk of falling and injury. Safety harnesses are often worn to stop a person's fall and prevent or reduce injury.[0003]Safety harnesses typically have a harness portion worn by the user and a tether or lanyard extending from the harness portion. The lanyard connects the harness portion to a secure structure. If a person falls from the elevated position the safety harness stops the person's fall when the lanya...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D06C3/06D06C27/00D06C15/02D06C7/00D03D15/56D03D15/567
CPCD03D1/0005D06C27/00D10B2331/02D10B2331/04D10B2401/06A62B35/04D03D15/04D10B2505/122A62B35/0075A62B35/0093D10B2331/021D06C3/06D06C7/00D06C15/02D03D15/08D03D15/567D03D15/56
Inventor RUSSELL, TIMOTHY M.
Owner YKK CORP OF AMERICA
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