Title: Tool for forming necks on circumferential surfaces of pipes

Abstract: A necking-out tool for forming projecting cylindrical nipples or necks on the circumferential wall of a pipe container or the like. The tool has a screw plug having a hook-shaped forming head and a thrust sleeve provided with a coaxial downholder flange for cooperation with the forming head and the screw plug. The thrust sleeve also has a hollow cylindrical interior corresponding to the contour of the forming head for the reception of the formed nipple or neck. A non-rotatable, telescopic guide means is associated with the thrust sleeve for mounting a torque converter on the screw plug.

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Other info:

Inventors: Rothenberger, Gunter (von der Hohe, DT)

Application Number: 666117
Filing Date: 1976-03-11
Publication_date: 1978-04-04
Assignee: Rothenberger GmbH & Co. Werkzeugeuge-Maschinen (Frankfurt am Main, DT)
Primary Class(es): 72/117 72/125
Other Classes:
US Patent Ref:

245678	Aug, 1881	Weaver	72/115.
1573397	Feb, 1926	Grenier	254/67.
1985454	Dec, 1934	McCabe	72/117.
2120497	Jun, 1938	Heinrich	254/67.
2511836	Jun, 1950	Cullen	29/157.
3050102	Aug, 1962	Hock	72/117.
3817071	Jun, 1974	Chalvignac	29/157.

Other Refs:
Primary Examiner: Larson, Lowell A.
Assistant Examiner:
Attorney: Burgess, Dinklage & Sprung