Abstract: An adjustable wrench includes an elongated member including a first handle end and a second end. The second end includes a fixed jaw and an engaging section formed thereon. The fixed jaw has a first clamping section. A movable jaw has a second clamping section formed on a first end thereof and a second end pivotally connected to the engaging section of the elongated member. An adjusting device is mounted between the second end of the elongated member and the movable jaw to urge the movable jaw to pivot relative to the fixed jaw. A fine adjusting device is provided for actuating the adjusting device to urge the second clamping section of the movable jaw to move slightly away from the first clamping section of the fixed jaw. An elastic device is provided for retaining the adjusting device in position.

Abstract: An adjustable sliding jaw wrench is disclosed which has a sliding jaw adjustment mechanism operated by a worm gear rotatably mounted in an opening in the wrench head, the worm gear driving a rack member to which the sliding jaw is attached. The worm gear is substantially shorter than the width of the opening in the wrench head in which it is mounted, and is spring biased into an operating position. A sliding locking member is movable between a locked position which will mechanically maintain the worm gear in its operating position, and an unlocked position in which the worm gear will be permitted to move in a direction opposing the biasing spring.

Abstract: An adjustable wrench having locked and unlocked conditions is provided. The wrench includes a wrench body including a fixed jaw, and a movable jaw slidably mounted on the wrench body. The wrench body includes first and second contact walls, the second contact wall having a wall cam surface. The wrench also includes an adjuster assembly including a worm gear on the body between the contact walls and threadedly engaged with the movable jaw for moving the movable jaw toward and away from the fixed jaw, and a locking disc disposed between the worm gear and the second contact wall and having a disc cam surface engagable with the wall cam surface of the second contact wall.

Abstract: An adjustable wrench having selectable lockable positions. Selectable locking positions are obtained using a pair of locking ball bearings that engage a plurality of recesses located on both ends of the thumb wheel. The recesses on the end are offset to the recesses on the other end. The width of the recesses on one end is greater than the width of the recesses on the other end. The wrench retains its "locked" position even when jarred, yet can be easily moved to a new set position by rotating the thumb wheel to the next selectable notch.

Abstract: A lock for an adjustable wrench to lock the adjustable jaw of the wrench in adjusted position. The lock includes a slide mounted on the wrench handle adjacent the head of the wrench for longitudinal slidable and guided movement with a thumb receiving member at the end of the slide remote from the wrench head and an arcuately curved recess on the inner surface of the slide engaging with the rotatable worm wheel used to adjust the adjustable jaw of the wrench thereby retaining the worm wheel and adjustable jaw in adjusted position by frictional engagement between the slide and worm wheel.

Abstract: An adjustable, self-locking crow foot wrench comprises a support member having a pair of movable jaws. A worm adjustment member is rotatably journaled on the support member and engages rack teeth on the jaws to adjust their spacing for different size bolts. A locking element, guided for movement between the worm adjustment member and a drive-stud-receiving recess, is movable into locking engagement with the worm adjustment member in response to insertion of a drive stud into the recess. A spring moves it out of locking engagement in response to removal of the drive stud. In a two-piece embodiment, the support member is a portion of one of the jaws; in a three-piece embodiment, it is a third part.

Abstract: A combination adjustable/lockable/measuring wrench which enables the user of the wrench to operate, with the same hand that is holding the wrench, a push button for selectively locking and unlocking the wrench jaws in any desired position. The push button controls an over center linkage which controls the legs of a U-shaped brake shoe for selectively gripping and ungripping the wrench worm gear shaft. On one side of the wrench jaws there is provided an inch scale for measuring various bolts and nuts. On the opposite surface of the wrench jaws there is a metric scale for similarly measuring such bolts and nuts but on a metric scale, rather than on an inch scale.