Tools – Wrench – screwdriver – or driver therefor – Slidable jaw adjustments
81167, 81175, B25B 1316
An adjustable wrench utilizes a drive member housed in a wrench body. The drive member has a cylindrical drive element having external male threads formed thereon, onto which a guide block is mounted by means of a bore, within which female threads, complementary to the male threads, are formed extending longitudinally through the guide block, so that the drive element extends through the bore with the male and female threads in engagement with one another, whereby rotation of the drive element is operable to move the guide block longitudinally along the drive element. A drive knob is fixed to and manually operable for selectively rotating the drive element. A pair of alignment arms connect a movable jaw element to the guide block so that the movable jaw element faces and is displaced from the drive block in longitudinal alignment with the bore and is separated from the drive knob by the drive block. The drive knob is rotated to move the movable jaw toward and away from a fixed jaw element formed on the wrench body so as to be in longitudinal alignment with the movable jaw element and fixed in position in the wrench housing between the movable jaw and the guide block.
patent: 2001789 (1935-05-01), Leaveck
patent: 4967613 (1990-11-01), Cone
patent: 5860336 (1999-01-01), Chen
Meislin D. S.
Thornton Robert R.
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