Automatic adjustable wrench

Wrench, comprising body means having a fixed jaw having an inwardly facing face at one end, a movable jaw on said body means having a face parallely facing said face of said fixed jaw, said movable jaw having an angular outer side parallely disposed and freely movable along an angular support surface of said body means, said angular outer side of said movable jaw and said angular support surface having mutually releasably engageable tooth formations therealong, first spring means engaging said body means and said movable jaw and biasing said movable jaw toward said fixed jaw, second spring means engaging said body means and said movable jaw and biasing said movable jaw away from said angular support surface whereby said tooth formations are maintained disengaged, said movable jaw including control means for moving said movable jaw away from said fixed jaw against the pressure of said first spring means whereby said jaws may be disposed at opposite sides of an object, said first spring means closing said movable jaw against said object upon release of said control means, rotation of said body means in a direction whereby said object forces said movable jaw against said support surface to overcome the bias of said second spring means causing engagement of said tooth formations whereby said movable jaw becomes fixed against movement away from said fixed jaw whereby said wrench is fixedly engaged with said object.