Adjustable spanner has lower section of movable clamping jaw as projecting running rail complementary to slide passages of main body and lower face of running rail has concave surface interacting with semi-circular slot in slide block

摘要

A lower section of the spanner's movable clamping jaw(3) is a projecting running rail(31) complementary to the slide passages(14) of the main body. A lower face of the running rail has a concave surface(32) which interacts with a semi-circular slot in the slide block. The concave surface with a thread, the projecting running rail and a projecting section(21) of the slide block together create a form complementary to the form of the slide passages of the main body.