公开(公告)号：WO1993009557A1

公开(公告)日：1993-05-13

申请号：PCT/US1992009407

申请日：1992-11-03

Applicant: ILLINOIS TOOL WORKS INC.

Inventor： ILLINOIS TOOL WORKS INC. ,  RUEHL, William, E. ,  FREDERIKSEN, Bjarne ,  ALICE, John ,  SWICK, E., Grant

IPC: H01H85/38

CPC classification number: H01H85/1755 ,  H01H85/0056 ,  H01H85/0082 ,  H01H85/38 ,  H01H2085/383

Abstract: A fuse comprises a body (12) having a blow chamber (32). A fusible element (14) is contained within the body and extends through the blow chamber. A contact (20) is disposed on the body electrically connected to the fusible element. The blow chamber (32) is sealed around the fusible element so that thermal energy in the fusible element can increase within the blow chamber for causing the element to open when an elevated current is applied to the element. The blow chamber is sufficiently sealed around the element for retaining a pressure created therewithin by vaporization of a portion of the element; that pressure is sufficient to cause an arc produced by fusion of the element to extinguish. Thermal conductive cement (36) is disposed about the entire fusible element without the blow chamber for preventing the fusible element from opening without the blow chamber before opening within the blow chamber.