Title: Coldwork system with delay split sleeve

Abstract: A method of coldworking a hole through a work piece which includes the steps of placing a seamless tubular member through the hole in the work piece, passing a mandrel through the tubular member so that the tubular member is expanded radially and circumferentially sufficiently to expand the material in the work piece about the hole beyond its elastic limit, and longitudinally fracturing the tubular member after substantially maximum expansion of the tubular member. The application also contemplates a tubular member construction for use in the method and a tool for performing the method.

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Inventors: King, Jr., John O. (Atlanta, GA, US)

Application Number: 489253
Filing Date: 1974-07-17
Publication_date: 1976-03-16
Assignee:
Primary Class(es): 72/393 29/446, 72/324, 72/370.07
Other Classes:
US Patent Ref:

2411246	Nov, 1946	Clapper	29/157.
2502711	Apr, 1950	Evans	30/92.
2507201	May, 1950	Evans	30/92.
3566662	Mar, 1971	Champoux	29/446.
3628246	Dec, 1971	Bronne	29/427.

Other Refs:
Primary Examiner: Lanham, C. W.
Assistant Examiner: Duzan, James R.
Attorney: Powell; B. J.