Work holders – Relatively movable jaws – Means to actuate jaw
Patent
1998-09-08
2000-06-27
Scherbel, David A.
Work holders
Relatively movable jaws
Means to actuate jaw
269 43, 269195, 269279, B25B 110
Patent
active
060797045
ABSTRACT:
A workholding apparatus has an improved positioning assembly centering top jaw members grippingly supporting a workpiece. The workholding apparatus includes a base member defining a horizontally elongate guide channel which opens upwardly through a top surface to form a guide passage. At least first and second jaw assemblies are disposed in longitudinally spaced relation along the respective guide passage, the first and second jaw assemblies each including a bottom jaw element which is slidably positioned for longitudinal displacement within the guide passage, and a top jaw member releasably mounted on the bottom jaw element. The workholding apparatus includes an actuator assembly for effecting movement of the movable jaw members longitudinally along a path formed by the guide passage. The bottom jaw elements each include a push plate element mounted in the guide passage on the inner side thereof. The positioning assembly includes a rotating member mounted to the base member and first and second pin elements in slots in the respective push plate elements connecting the plate elements to the rotating member. The rotating member controls the relative positions of the first and second push plate elements such that the movable jaw members close on a workpiece at a precise self-centering location.
REFERENCES:
patent: 805013 (1905-11-01), Hanimann
patent: 2605660 (1952-08-01), Firth
patent: 5649694 (1997-07-01), Buck
patent: 5735513 (1998-04-01), Toffolon
patent: 5954320 (1999-09-01), Bohler
patent: 5984290 (1999-11-01), Durfee, Jr.
Scherbel David A.
Wilson Lee
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