Patent ID: 7805810

Claim:
A multi leaf extendable gear hinge comprising: an inner leaf; a middle leaf; an outer leaf; a mounting assembly; and a load mounting plate; wherein said inner leaf has a vertical cylinder with a vertical bore therethrough, located thereon at a distal end and a segmented first knuckle located thereon with first vertical bore therethrough, located at a proximate end thereof; said middle leaf has a second cylindrical knuckle with a second vertical bore therethrough, located thereon at a distal end and a third cylindrical knuckle with a third vertical bore therethrough, located thereon at a proximate end and a bore therethrough said middle leaf; said outer leaf has a segmented fourth cylindrical knuckle with a fourth vertical bore therethrough, located thereon at a distal end and said load mounting plate affixed to a proximate end thereof; wherein said vertical cylinder is pivotally mounted within said mounting assembly by a pin; and wherein said first knuckle and said second knuckle are held in an interleaved configuration by a fixed first upper stub shaft and a fixed first lower stub shaft and said third knuckle and said fourth knuckle are held in an interleaved configuration by a fixed second upper stub shaft and a fixed second lower stub shaft; and further comprising six substantially similar bevel gears wherein a first bevel gear is affixed to said first upper stub shaft, a second bevel gear is affixed to said first lower stub shaft, a third bevel gear is affixed to a first end of said pivot shaft, a fourth bevel gear is affixed to a second end of said pivot shaft, a fifth bevel gear is affixed to said second upper stub shaft, and a sixth bevel gear is affixed to said second lower stub shaft.