4 types of car seat belts what makes them different

3 point retractable seat belt
Make Your Seat Belt Work for You: Customize It
January 28, 2019

4 types of car seat belts what makes them different

seat belts

4 Types of Car Seat Belts – What Makes Them Different?


seat belts



Seat belts are responsible for saving 15,000 lives in the U.S. each year. In fact, wearing a safety belt reduces a user’s risk of dying in a car accident by 45%. As a result of wearing a custom seat belt, the likelihood of suffering a serious injury is reduced by 50%. Similarly, people who do not wear a seat belt are 30 times more likely to be thrown from the vehicle during an accident.

Furthermore, as the law now mandates the regular use of safety belts, the number of car crash fatalities drops each year.



The Function of a Seat Belt and How They Save Lives


  • Function

A seat belt is a safety device designed to prevent severe injuries from occurring to drivers and passengers in vehicles.


  • Design

The typical modern seat belt has a strip of webbing that fastens around the individual. It is connected to a retractor. The retractor is designed with a spool that the webbing winds around. When the user pulls on the webbing, the spool then turns counter clockwise and feeds webbing off of it. Upon release, the webbing winds back up on the spool. This rewinding action is due to a spring that provides the rotation force to the webbing spool.


The retractor also has a mechanism designed to lock the belt into place if the car comes to a sudden stop, which causes the webbing to hold firmly against the wearer. Consequently, this prevents uncontrolled movement inside the vehicle during an accident. Seat belt safety is therefore provided when properly fitting devices are used every time the vehicle is in motion.



Benefits of a Custom Seat Belt

seat belt accessories

  • Restraining the user from uncontrolled movements inside the vehicle
  • Preventing the user from propelling forward, causing potential head injury
  • Protecting the user from impact with the windshield
  • Confining the user from ejection from the vehicle
  • Allowing the most stable areas of the body to absorb the most force of an impact



What are 2-Point Seat Belts?


  • Function and Design

A 2-point seat belt is also referred to as a lap belt. The belt goes directly across  the user’s lap to connect with the buckling mechanism, and has no shoulder harnesses.


  • History

Invented in the early 1900s, the 2-point seat belt was the first type of safety belt installed in passenger vehicles. Before 1964, safety belts were an optional, but not required feature in vehicles. Granted, this model was very helpful, but, after a few years, auto manufacturers started to put in shoulder harnesses for added safety.


  • 2-Point Seat Belts and Antique Vehicles

Ordinarily, people who purchase antique vehicles want them refurbished to their original condition. For this reason, new owners do not usually add safety belts if they are not standard issue for that model, and the law does not require them to be installed. Seat belts, however, improve the safety of both the driver and passengers. One should also ensure that their antique vehicle can be driven without safety belts in place before doing so. Restrictions on how far they can be driven without these devices may apply. In addition, if the vehicle came with safety restraints, one should try to replace the restraints with exact replicas of the originals.



What are 3-Point Seat Belts?

3 point seat belt


  • Design

A 3-point seat belt has a sash that goes over the shoulder of the user, then crosses their lap.

  • History

First produced in 1959 by the car company, Volvo, the belts were initially considered luxury accessories; other car manufacturers, therefore, did not install them.

  • Benefits

These seat belts distribute the force of an impact across the chest, pelvis, and shoulders, decreasing the risk of injury for users in an accident. The design prevents more injury than the lap belt alone. As a result, the 3-point belt is the type most commonly used. As the law now mandates that all motor vehicles have seat belts, the 3-point belt is the one predominantly installed by auto manufacturers.



What is a 4-Point Seat Belt?


  • Design

A 4-point seat belt has two shoulder straps instead of one. This custom style belt is also known as a racing car seat belt. They are similar to those found in a child’s car seat. The difference between them is that the car seat has a strap that goes between the legs; the racing car seat belt does not.


  • Safety Considerations

These seat belts cannot be installed on seats with adjustable head rests. Additionally, they cannot be installed on seats that have sectional or integrated head rests.


One should never cut or alter car seats to install a seat belt. They are crash-tested and rated with the original manufacturer’s seat belt in place. When cut or altered, it may change the way the seat works in the event of a crash. Moreover, altering the seat or seat belt of the vehicle may also violate insurance conditions.


  • Installation Considerations

When installing a racing harness, read the manufacturer installation manual carefully. Never take installation short cuts or change any of the seat belt components, and never install the seat belt connections directly onto the floor between the front and back seats.


Child Safety Seats

child car seat belt

As a result of the use of child safety seats, more than 85% of children in automobile accidents are not harmed. Carefully reading of installation instructions allow one install these items properly. Local law enforcement agencies and hospitals are usually glad to instruct new users how to properly install them.



Warning Triangles and Other Safety Accessories


  • Warning Triangles

The warning triangle is a highly reflective triangle meant to signal when a car is broken down. It warns other motorists that a car is stationary.


  • Other Safety Accessories

Seat belt suppliers and seat belt manufacturers often make and sell additional accessories which include:


  • Seat belt extensions to ensure proper fit
  • Buckle extenders to make the belts easier to connect to the buckle
  • Child safety seats
  • Booster seats that make a child tall enough for a normal seat belt assembly
  • Padded shoulder protectors for additional comfort


Of note, accessories to the safety belts should enhance safety without altering the functions of the safety belt.



How to Select the Best Seat Belt Supplier for Your Needs


Seat belt manufacturers make many different types of seat belts and safety equipment. Seat belt manufacturers usually sell to suppliers, or straight to car manufacturers. To replace a seat belt component, one must locate a seat belt supplier.


Consider the following when are selecting which a seat belt supplier:

  • Price

First, consider the cost of the belts. Shop with several different suppliers to determine which one has the best price for the best product. Make sure to compare quality and features against cost to avoid purchasing for a lesser device.


  • Certification

Second, a supplier should have at least one of these three major types of certifications:

SGS certification, Emark, or Federal Motor Vehicle Safety Standards (FMVSS).

Seat-Belt-Emark-Certification Seat-Belt-FMVSS-Certification Seat-Belt-SGS-Certification

A supplier with all three certifications, however, is preferred.


  • Quality

Third, the quality of the safety devices used will determine their safety. Never buy any products that are not made from quality materials, or those without proof of seat belt safety testing.


  • Customization

Finally, shop with a supplier that can create customized safety belts for better protection. It should be long enough to fasten easily, and it should be comfortable enough to wear it every time a user drives. The customization should retain the safety of the belt and should not interfere with belt performance.


In summary, when one rides in a vehicle without fastening the safety belt, they risk injury or death.


The following tips and facts are a reminder to remember to buckle up:

  • Buckle the safety belt before starting at the engine.
  • Do not drive any distance without wearing a safety belt.
  • Most car accidents happen within twenty five miles of home.
  • Never pin or alter the safety belt to make it fit loosely. Do not place a pillow between your body and the safety belt.
  • Always place children in car safety seats. Make sure the car safety seat is right for the age, weight, and height of the child using it.