Patent ID: 9700404
Date: 2017-07-11
CPC Classifications: A61B,A61F,B29C

Claim:
1. A tissue expander comprising: an outer shell configured to retain a fluid; an injection dome comprising a self-sealing septum region arranged through said outer shell, said injection dome adapted to accept a hypodermic needle to fill said outer shell with fluid; a self-sealing patch arranged around said injection dome and along said outer shell, said self-sealing patch consisting of: a first sheet having a first sheet outer perimeter and a first sheet inner edge defining a first sheet central opening; a second sheet having a second sheet outer perimeter aligned with said first sheet outer perimeter and a second sheet inner edge defining a second sheet central opening aligned with said first sheet central opening; an outer washer captured between said first and second sheets at said first sheet outer perimeter and said second sheet outer perimeter; and, an inner washer captured between said first and second sheets at said first sheet central opening and said second sheet central opening; wherein said first sheet and said second sheet are attached to one another using said outer and inner washers to form a sealed annular space between an inner perimeter of said outer washer and an outer perimeter of said inner washer, said sealed annular space being filled with a self-sealing material.