DIMINISHING ARM TOGGLE LINKAGE

摘要

A diminishing arm toggle linkage has the work site (26, 28) within the toggle geometry (11, 17) and thereby provides exponential force enhancement. In preferred embodiments the mode of operation shifts on demand from a light-load-pivoting mode to a heavy-load-rolling element mode thereby easing operation and reducing friction and wear so as to provide prolonged durability and continuing dimensional accuracy. When the togle linkage is embodied in a crimping tool (51) an optional anti-reversing ratchet assembly (165) prevents the tool from opening during use until a crimp is completed.