Paul L Toth

US Patent:

42156050, Aug 5, 1980

Filed:

Nov 3, 1978

Appl. No.:

5/957470

Inventors:

Paul Toth - Allen Park MI
Kenneth O. Cross - Northville MI

Assignee:

N. A. Woodworth Company - Detroit MI

International Classification:

B23B 3130
B23B 3300

US Classification:

82 40R

Abstract:

A work driver chuck having face and actuator plates interconnected by the pivot shafts of work holding cam jaws carried by and journaled for rotative movement in the face plate. Although normally centered on the rotational axis of the chuck, the assembly of plates and jaws is released for limited universal free floating movement during the actual work clamping operation to compensate for eccentricity of or surface irregularities in the workpiece. The actuator plate is slidable relative to the face plate and is operative as it moves to turn the jaws angularly into or out of engagement with the work.

US Patent:

51352427, Aug 4, 1992

Filed:

May 21, 1991

Appl. No.:

7/703405

Inventors:

Paul Toth - Allen Park MI

Assignee:

Illinois Tool Works Inc. - Glenview IL

International Classification:

B23B 3124

US Classification:

279 402

Abstract:

In an adjustable chuck for gripping workpieces of different sizes, three jaws are mounted for relative movement. A hydraulically driven mechanism is operable selectively for closing the jaws to grip a workpiece and for opening the jaws to free the workpiece. Two strain gauges on one of the jaws sense the gripping force applied by the jaws to the workpiece. A computer, which responds to the strain gauges, coacts with a control relay and with hydraulic valves to control flow of hydraulic fluid into and from the closing and opening mechanism. A system comprising a plurality of such chucks is contemplated, in which one computer coacts therewith to control the closing and opening mechanism of any selected chuck of the system, and which adjusts itself for minor variations among the system chucks.