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US 5,979,946 AGranted
Snap-in end fitting for pipes
AssigneeBend All Manufacturing Inc.
InventorsHorst Udo Petersen, Alfred D. Napolitano, Jr.
Life of this patent
Estimating the term…
Abstract
An oil-pipe for an auto-engine has a quick-connect coupling. The pipe has a cold-pressed end-shape, which includes a radial flange. A clip abuts the flange, and secures the coupling. The larger the area of the flange, the more secure the clip, and a recess formed into the wall of the pipe immediately behind the flange adds area to the flange without requiring that the flange have a large external diameter. The recess can be rolled in, or can be formed by cold-pressing.
Claims8
A tubular pipe having a formed end-shape at the left-end thereof, wherein:
- the pipe has a metal wall of nominal internal diameter ID and external diameter OD;
- the end-shape includes a flange, in which the metal of the pipe wall is formed to a diameter FD, measured externally, and FD is greater than OD;
- the flange has left and right radially-extending walls;
- the right wall of the flange has a right-facing surface, being a surface of the metal that faces rightwards, away from the left-end of the pipe;
- the end-shape includes a recess, which is formed in the metal of the pipe wall;
- in the recess, the metal of the pipe wall is formed to a diameter RD, measured internally, and RD is less than ID;
- in the end-shape, the recess is positioned immediately to the right of the rightwards-facing surface of the flange;
- the recess has a left extremity and a right extremity, and the arrangement of the end-shape is such that the left extremity of the recess forms a radially-inwards extension of the right-facing surface of the flange.
5 more elements
Dependencies are inferred from the claim text.