Vehicle Rear Bumpers
A rear bumper is used on the back of a vehicle,in order to increase passenger safety,in the event of a rear end collision. Rear bumpers were first used in the 1960’s, and they became mandatory in 1971 when a law was passed, which required them to be installed on all new vehicles. This law required the bumpers to ward of an impact at 5 miles per hour but the speed was later reduced to 2.5 miles per hour to take some of the heavy burden of the manufactures. Over the years, rear bumpers have evolved from a large piece of metal, to plastic materials, which can be concealed.
The rear bumpers that are commonly found on older vehicles and trucks are large steel bumpers that connect to the frame with steel brackets. This type of bumper is still used on modern trucks because it is strong enough to attach a towing ball. Metal bumpers are typically finished in chrome, which enhances the vehicles appearance, while preventing corrosion. Metal bumpers have seen less use over the years, because they don’t absorb impact as well as some of the newer bumper designs.
Modern vehicles have started using rear bumpers that have many different components in them which will help absorb the impact. The internal components on these modern rear bumpers which adds protection is a strip of rubber or foam. These materials are designed to dampen an impact so that the full force isn’t directed strait into the vehicles frame. An outer shell called the bumper cover is used over this material to increase looks and protect the foam or rubber from deteriorating in the harsh elements. This cover can be molded into many shapes which is why many modern rear bumpers will blend in with the rest of the vehicles body styling so well.
When a vehicle is rear-ended by another vehicle, a modern rear bumper is designed to bend or crack depending on how hard the hit is. This means that a plastic bumper will most likely be able to escape a light collision with little, to no damage. After a collision, this type of rear bumper can be easily replaced because the cover is only held in place with some screws, bolts, or clips. Because of all these advantages, even trucks are starting to use this style of bumper because manufactures have created a hitch that is built into the bumper so that the truck can still perform all of its heavy duty functions.