House of Doors - Roanoke, VA House of Doors - Roanoke, VA recommends the use of geared aluminum continuous hinges. Geared aluminum continuous hinges are a secure and long-term solution for high-traffic commercial door openings, they reduce maintenance cost while outperforming traditional butt hinges in schools, offices, airports, storefront, hotels and public and industrial buildings! It has been proven that a continuous geared aluminum hinge may last 50+ years and require little to no maintenance, saving you SUBSTANTIALLY over the life of the assembly Geared aluminum continuous hinges have been proven to last over 25,000,000 cycles and are available to hold doors up to 1,000lbs Geared aluminum continuous hinges have a proud history beginning in 1963 with Austin Baer, an MIT -trained engineer, who earned a patent for his design of hinge leaves with intermeshed gears. In 1968, he earned a second patent for adding thrust bearings to the original design. A
