Tools – Tool jaw – Jaw features
Patent
1985-07-03
1987-06-02
Schmidt, Frederick R.
Tools
Tool jaw
Jaw features
81463, 814245, 814265, 81423, 269 53, B25B 702
Patent
active
046693416
ABSTRACT:
A workpiece to which traction to be applied is firmly held by a gripping device to which is anchored one end of an impacting hammer having a rectilinear guide with a free end directed away from the workpiece. An impact member of high inertia is slidably disposed on the guide for rapid movement toward an impacting engagement with an abutment carried by the guide adjacent its free end, whereby the resulting tensional forces in the form of a sudden impulse are transmitted through the gripping device to the workpiece for use, for example, in withdrawing the workpiece from a member in which it is firmly anchored or embedded. The gripping arrangement of at least one jaw of the gripping device utilizes a single tooth which is harder than the workpiece to be extracted so that such tooth effectively bites into such workpiece to provide a firmer grip. In another embodiment, each jaw may include a tooth each biting into the workpiece in alignment with each other or in staggered alignment. The impacting hammer is designed to provide maximum force during extraction, to reduce operator fatigue, and to be removable so that the gripping device may be used alone or in combination with one or more other tools.
REFERENCES:
patent: 442426 (1890-12-01), Donnelly
patent: 2495308 (1950-01-01), Amigone
patent: 3367703 (1968-02-01), Pittis
patent: 3585704 (1971-06-01), Schroeder
patent: 3597775 (1971-08-01), McCasland
patent: 3791012 (1974-02-01), Jenkin
patent: 4307635 (1981-12-01), Genova
patent: 4386542 (1983-06-01), Verna
patent: 4505011 (1985-03-01), Dupuy
Schmidt Frederick R.
Vaught Bradley I.
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