Patent ID: 6817424
Filing Date: 2004-11-16
Classification: B25F

Abstract:
An adjustable housing for a hand tool comprising:a head with a proximal end, a distal end and composed of two halfcasings combined with each other, and each half casing comprising a first adjusting base formed on the half casing at the proximal end of the head; and a recess with an inner surface defined in the first adjusting base; a handle with a proximal end pivotally attached to the proximal end of the head, a distal end and composed of two half casings combined with each other, and each half casing of the handle comprising a second adjusting base formed on the half casing at the proximal end of the handle and corresponding to the first adjusting base on a corresponding one of the half casings of the head; and a recess with an inner surface defined in the second adjusting base and facing with the recess in the corresponding first adjusting base; a pivot extending through the adjusting bases on the head and the handle to pivotally connect the head with the handle; and two positioning devices respectively mounted between the facing recesses of the first and second adjusting bases on the head and the handle and each positioning device comprising a pressing disk non-rotatably received in the recess in a corresponding one of the second adjusting bases on the handle and having a central hole defined through the pressing disk for the pivot extending through the central hole; a guiding block formed on the pressing disk at a side far away from the corresponding half casing of the handle and having two curved guiding edges formed respectively on two ends of the guiding block; and a positioning block formed on the pressing disk at a side far away from the corresponding half casing of the handle and having two ends; a pressed disk non-rotatably received in the corresponding first adjusting base and having a central hole defined through the pressed disk for the pivot extending through the central hole a guiding block formed on the pressed disk at a side far away from the corresponding half casing of the head and having two curved guiding edges formed respectively on two ends of the guiding block and selectively abutting against one end of the positioning block on the pressing disk; and a positioning block formed on the pressing disk at a side far away from the corresponding half casing of the handle and having two ends selectively abutting against one of the guiding edges of the guiding block on the pressing disk; and a biasing member abutting against one of the pressing disk and the pressed disk to provide a restituted force to the abutting disk so as to make the pressing disk abut against the pressed disk.