Tools – Wrench – screwdriver – or driver therefor – Handle clutched to head
Patent
1992-09-11
1993-03-30
Swann, J. J.
Tools
Wrench, screwdriver, or driver therefor
Handle clutched to head
B25B 1346
Patent
active
051973588
ABSTRACT:
A socket wrench has a box end which confines an internal wall therein. A pair of rollers are connected rigidly by an eccentric shaft and are received in the box end. A pair of retaining plates are provided in the box end on both sides of the box end so as to retain the rollers therein. A resilient plate is provided between the rollers adjacent to the eccentric shaft. An inverted V-shaped rigid pawl member is provided around the eccentric shaft and includes a first and second section. The first section includes a curved first side formed adjacent to the internal wall of the box end, a straight second side forming a first clearance with the eccentric shaft and a free end interconnecting the curved first and straight second sides and which is biased by the resilient plate so that at least a portion of the curved first side adjacent to the resilient member frictionally abuts with the internal wall. The second section includes a third straight side connected to the curved first side and forming a second clearance between the internal wall and the third straight side, a curved fourth side spaced from the eccentric shaft and a free end interconnecting the straight third and fourth curved sides. A protrusion is formed between and interconnects the straight second side and the curved fourth side and pivotally abuts the eccentric shaft.
REFERENCES:
patent: 1157427 (1915-10-01), Seivert
patent: 2898790 (1959-08-01), Lazar et al.
patent: 2982161 (1961-05-01), Angquist et al.
patent: 3019682 (1962-02-01), Hare
patent: 4515044 (1985-05-01), Harstad
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