Patent ID: 9523225
Filing Date: 2016-12-20
CPC Classification: E05D,E05Y,Y10T

Claim Text:
1. A concealed hinge, comprising: a first housing, wherein the first housing holds a first pin and a second pin in a fixed position; a second housing; wherein the second housing holds a third pin and a fourth pin in a fixed position; a linkage, the linkage comprises a central link, an upper link, and a lower link; the central link includes an inner end and an outer end, wherein the inner end of the central link transitions into a first curved portion; the upper link includes an inner end, a middle portion, and an outer end, the lower link includes an inner end, a middle portion, and an outer end, wherein, in a closed position of the concealed hinge, the inner ends of the upper and lower links angle away inwardly from an opening in the first housing and then curve back outwardly toward the opening and then transition into the middle portions; and, wherein the first pin and the second pin engage the first housing to the linkage, and the third pin and the fourth pin engage the second housing to the linkage, and wherein the linkage rotates relative to the first pin, the second pin, the third pin, and the fourth pin.