Adjustable open-end wrench

An adjustable size, open-end wrench comprising a roughly C-shaped base jaw member having an upper portion forming a base grip, a lower portion forming a substantially flat, plate-like tongue having an exposed, upper, straight, horizontally elongated edge, and a narrow center portion interconnecting the upper and lower portions and forming a guide;

• a roughly L-shaped sliding jaw member having an upright portion forming a movable grip positioned oppositely to said base grip, and having a generally horizontal leg which is notched to slidably receive and fit around the opposite sides of the base grip center portion and which is slidably engaged with the exposed upper edge of the base jaw member lower portion for slidably moving the movable grip towards and away from the base grip;
• an elongated, upright handle having its upper end bifurcated to form a pair of parallel, spaced apart legs arranged on opposite sides of the base jaw member tongue which is closely fitted between said legs;
• pivot means pivotally interconnecting said spaced apart legs and the tongue;
• at least one of said handle legs having a saw tooth-like locking formation formed on its upper edge for releasably interengaging with a corresponding saw tooth-like formation formed on the lower edge of the sliding jaw horizontal leg;
• a spring means normally spring-urging the movable grip towards the base grip;
• whereby the handle may be pivoted relative to the base jaw member in a direction to separate the interengaged sliding jaw leg and handle leg saw tooth locking formations so that the sliding jaw member may be slid endwise relative to the base jaw member for moving the movable grip towards and away from the base grip for adjusting the distance therebetween, and the movable jaw may be immobilized relative to the base jaw grip by pivoting the handle in the opposite direction to again interengage the saw tooth-like locking formations.