Five-point harness

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A 5-point harness in a racing car. Lotus 22 inside detail.jpg
A 5-point harness in a racing car.
Child held in a car seat by a five-point harness Safeseat.jpg
Child held in a car seat by a five-point harness

A five-point harness is a form of seat belt that contains five straps that are mounted to the car frame. It has been engineered for an increase of safety in the occurrence of an automobile accident. As a result, this form of seat belt has been mandated in the race car competition of NASCAR. [1] This was an invention made mandatory to have due to the high velocities involved in the sport. Along with the design of the seat belt, helmet straps have been designed to increase the safety of the driver. This invention has also been used to secure infants and young children in child safety seats.

Contents

Structure

The five-point harness is preferred as a safety mechanism for its high amount of safety compared to other designs. [2] The five-point harness consists of five straps. Two are located at the shoulders, two at the hips, and one at the crotch that all come to connect to a buckle release mechanism. [3] [4] This way of buckling up holds the driver's body tight in the seat, which in turn protects the upper body from injury. The only downside to this seat belt mechanism is the insecurity of the driver's head. [4]

Helmet

There have been different models of helmets designed to hold the drivers head in place. A helmet restraint is equipped in some five-point harness seats to prevent brain and neck injury. For example, in NASCAR, it protects the driver in case of a car crash or an immediate change of velocity where the driver has limited control of his momentum. [4] The apparatus consists of a strap that runs from both of the sides of the helmet to the vehicle; or a strap connected to the vehicle from both sides of the driver that runs across the front of the helmet, instead of two independent straps on each side attached to the helmet. The mechanism is called a HANS (head and neck support) device [4]

Helmet straps

To prevent the helmet straps from impairing the drivers vision, there is a design where the straps are held horizontal to prevent the straps from sagging. [5] There are also designs in which no apparatus is needed to keep straps out of the drivers sight. [4] Helmet straps are made up of shock absorbing material used while climbing or for security when working at high elevations. The straps include a woven nylon that requires up to 475 lbs. of force to cause the straps to tear. [5] Straps that are stretchable allow the drivers brain to slow down to avoid brain damage caused from the brain slamming into the skull; but the straps do not let the head move too far forward to cause neck injuries.

Child seats

The five-point harness is also used to buckle up children in forward-facing and rear-facing seats. It is designed with the same concept of tightly holding the passenger to the seat with the use of five different straps but built for the young children. This form of seat harness for young children "should be a default standard" when children are present in a motor vehicle according to Phil Wilson. [6] The reason there have been a number of injured young children and infants in survivable accidents is due to incorrect use of the Child Safety Seat (CSS). [3]

To assist caregivers in the safe transportation of children, the USA National Child Passenger Safety Board maintains the quality and integrity of the National Child Passenger Safety Certification Training Program. [7] The program is used to train and certify child passenger safety technicians and instructors. Three of the most common issues that put children at risk: improperly used or installed safety seats, children left in hot cars, and teen drivers. [8]

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A seat belt, also known as a safety belt or spelled seatbelt, is a vehicle safety device designed to secure the driver or a passenger of a vehicle against harmful movement that may result during a collision or a sudden stop. A seat belt reduces the likelihood of death or serious injury in a traffic collision by reducing the force of secondary impacts with interior strike hazards, by keeping occupants positioned correctly for maximum effectiveness of the airbag, and by preventing occupants being ejected from the vehicle in a crash or if the vehicle rolls over.

<span class="mw-page-title-main">Airbag</span> Vehicle safety device

An airbag is a vehicle occupant-restraint system using a bag designed to inflate extremely quickly, then quickly deflate during a collision. It consists of the airbag cushion, a flexible fabric bag, an inflation module, and an impact sensor. The purpose of the airbag is to provide a vehicle occupant with soft cushioning and restraint during a collision. It can reduce injuries between the flailing occupant and the interior of the vehicle.

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<span class="mw-page-title-main">Automotive safety</span> Study and practice to minimize the occurrence and consequences of motor vehicle accidents

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<span class="mw-page-title-main">Webbing</span> Strong fabric woven as a flat strip or tube used instead of rope

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<span class="mw-page-title-main">Car seat</span> Seat used in automobiles

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<span class="mw-page-title-main">Pet harness</span>

A pet harness is equipment consisting of straps of webbing that loop nearly around—that fasten together using side release buckles—the torso of an animal.

<span class="mw-page-title-main">Hutchens device</span> Safety device for race car drivers

A Hutchens device is used for protecting race car drivers in the event of an accident by controlling head movement, reducing head and neck injuries due to whiplash. It consists of a series of straps, attached to the helmet and connected across the chest and at the waist, depending on the lap belt for anchoring. The device was developed beginning in 2000.

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<span class="mw-page-title-main">Child safety seat</span> Seat designed to protect children during traffic collisions

A child safety seat, sometimes called an infant safety seat, child restraint system, child seat, baby seat, car seat, or a booster seat, is a seat designed specifically to protect children from injury or death during vehicle collisions. Most commonly these seats are purchased and installed by car owners, but car manufacturers may integrate them directly into their vehicle's design and generally are required to provide anchors and ensure seat belt compatibility. Many jurisdictions require children defined by age, weight, and/or height to use a government-approved child safety seat when riding in a vehicle. Child safety seats provide passive restraints and must be properly used to be effective. However, research indicates that many child safety restraints are often not installed or used properly. To tackle this negative trend, health officials and child safety experts produce child safety videos to teach proper car seat installation to parents and caregivers.

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<span class="mw-page-title-main">Safety harness</span> Equipment designed to protect from falling

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<span class="mw-page-title-main">Head restraint</span> Automotive safety feature

Head restraints are an automotive safety feature, attached or integrated into the top of each seat to limit the rearward movement of the adult occupant's head, relative to the torso, in a collision — to prevent or mitigate whiplash or injury to the cervical vertebrae. Since their mandatory introduction in some countries beginning in the late 1960s, head restraints have prevented or mitigated thousands of serious injuries.

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Simpson Performance Products is an American motorsports parts supplier that manufactures safety products such as gloves, helmets, harness systems, driver's suits, head restraints, and shoes. It is marketed to racers ranging from participants at local track days to international Formula One and NASCAR teams. It was started by Bill Simpson as Simpson Drag Chutes.

<span class="mw-page-title-main">Safety in NASCAR</span> Car racing safety

Safety in NASCAR has evolved into one of the biggest concerns in stock car racing's largest sanctioning body. Mainly after the death of Dale Earnhardt, a seven time Winston Cup Series champion, NASCAR has decided to change all of their safety policies, such as the use of the HANS device. Since 2001, NASCAR has also changed the cars for the NASCAR Cup Series and the Xfinity Series. NASCAR's safety policy includes the racing fire suit, carbon fiber seating, and roof flaps.

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References

  1. Bonsor, Kevin (2001-02-23). "How NASCAR Safety Works". Auto.howstuffworks.com. Retrieved 2013-10-13.
  2. Speck, Shane (2003-07-04). "How Child Car Seats Work". Auto.howstuffworks.com. Retrieved 2013-10-13.
  3. 1 2 Winston, Flaura K.; Durbin, Dennis R. (9 June 1999). "Buckle Up! Is Not Enough: Enhancing Protection of the Restrained Child". JAMA. 281 (22): 2070–2072. doi:10.1001/jama.281.22.2070. PMID   10367804.
  4. 1 2 3 4 5 USpatent 6381758B1,Lyman J. Roberts, II; Asif A. Lala& Panasarn Aim Jirut,"Head Restraint System for Racecar Drivers",published 7 May 2002
  5. 1 2 USpatent 2002043831A1,Andrew Jackson Aslup,"Driver Head Restraint",published 18 April 2002
  6. Wilson, Phil (September 2007). "Fasten their seatbelts: legal restraint of children in car seats and road ambulances". Nursing Children and Young People. 19 (7): 14–18. doi:10.7748/paed2007.09.19.7.14.c4451. PMID   17926766.
  7. "National Child Passenger Safety Board". March 3, 2013.
  8. "National Safety Council".