Expandable element for holding a workpiece to be tooled

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Description

FIG. 1 is a perspective view of an expandable element for holding a workpiece to be tooled, showing my new design, shown in the extended position;

FIG. 2 is an enlarged perspective view thereof, shown in the retracted position.

Referenced Cited
U.S. Patent Documents
4084803 April 18, 1978 Beekenkamp
4155542 May 22, 1979 Jansson
Patent History
Patent number: D256021
Type: Grant
Filed: Dec 29, 1977
Date of Patent: Jul 22, 1980
Inventor: Sixten Jansson (950 10 Lulea)
Primary Examiner: Wallace R. Burke
Assistant Examiner: B. J. Bullock
Attorney: Nelson Littell
Application Number: 5/865,888
Classifications
Current U.S. Class: Tool Or Work Holder (D15/140)
International Classification: D1509;