Internal and external extruded nipples or nozzles in pipe header

Details Internal and external extruded nipples or nozzles in pipe header Internal and external extruded nipples or nozzles in pipe header

1978-01-26

1979-07-24

Keenan, Michael J.

Metal deforming

With cutting

29157C, 291574, B21D 2828

Patent

active

041618734

ABSTRACT:
Nipples are extruded on metal parts around holes therethrough by providing an initial hole having a wide portion and a narrower portion, the wide portion having the diameter desired in the finished hole. A tapered mandrel is forced through the initial hole, extruding a nipple and resulting in a hole of the desired diameter.

REFERENCES:
patent: 1243005 (1917-10-01), Taylor
patent: 2058064 (1936-10-01), Culbertson
patent: 2157354 (1939-05-01), Sherman
patent: 2383584 (1945-08-01), Beishline et al.
patent: 2632511 (1953-03-01), Hamilton
patent: 2859870 (1958-11-01), Hitz
patent: 3141358 (1964-07-01), Burke, Jr. et al.
patent: 3415101 (1968-12-01), Reincke

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