| 主权项 |
1. A concealed hinge, comprising:
a first housing, wherein the first housing holds a first pin and a second pin; a second housing; wherein the second housing holds a third pin and a fourth pin; 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 and lower links include inner ends, middle portions, and outer ends, wherein the inner ends angle away from an opening in the first housing and then curve back 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. |
