Patent ID: 7418891
Filing Date: 2008-09-02
Classification: B25B

Abstract:
1. A spanner comprising: a lever; a first jaw and a second jaw respectively extending from both sides of a lead end of the lever and forming a gripping space therebetween for gripping a bolt; a toggle bar installed on a lead end of the second jaw so as to be allowed to be rotated only to the outward of the gripping space; a tension spring installed in a long hole formed longitudinally through the bottom side of the second jaw and having a lead end connected to the inner side of the toggle bar so as to elastically support the toggle bar to the inward of the gripping space; a tension adjustment bolt engaged with the long hole from the outer surface of the second jaw to be adjustable movable in an axial direction; a tension adjustment nut being threadly engaged with the tension adjustment bolt in a state of the axial movement being limited; and an elastic support plate made of elastic material connected to the first jaw and having a lead end extruding from the lead end of the first jaw diagonally toward the second jaw so as to elastically support a bolt head or nut gripped in the gripping space.