Flexible metal conduit and method of making the same

Details Flexible metal conduit and method of making the same Flexible metal conduit and method of making the same

1991-04-04

1992-10-27

Robinson, Ellis P.

Stock material or miscellaneous articles

All metal or with adjacent metals

Helical or with helical component

428 341, 428 353, 428 57, 428222, 428182, 428184, 428603, 428586, 428595, 138122, 138129, 138135, B21C 1106

Patent

active

051588145

ABSTRACT:
A flexible metal conduit and fabrication method where a thin metal ribbon is arranged in a helix about a central axis. The ribbon defines helically extending corrugated inwardly and outwardly facing conduit surfaces formed by alternating ridges and valleys extending parallel to the ribbon edges. Ribbon edge locking structure secures abutting ribbon convolutions together and comprises first and second confronting parallel ribbon edge flanges extending at least a substantial length of the ribbon. The flanges are lapped and tightly rolled together to form a two ply spirally curved wall defining a tube whose central core has a generally circular cross sectional shape. The tube is disposed adjacent a convolution surface and extends along a helical path parallel to the abutting convolutions.

REFERENCES:
patent: 3331400 (1967-07-01), Vilkaitis
patent: 3340901 (1967-09-01), Lombardi
patent: 3435852 (1969-04-01), Trihey
patent: 3815639 (1974-06-01), Westerbarkey
patent: 3938558 (1976-02-01), Anderson
patent: 4141385 (1979-02-01), Siegwart
patent: 4197728 (1980-04-01), McGowen
patent: 4220181 (1980-09-01), Nyssen
patent: 4377188 (1983-03-01), Siegwart
patent: 4435460 (1984-03-01), Menzel
patent: 4486484 (1984-12-01), Schafer
patent: 4838317 (1989-06-01), Andre et al.
patent: 4977931 (1990-12-01), Menzel

Affiliated with

Also associated with

Rating

Flexible metal conduit and method of making the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Flexible metal conduit and method of making the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flexible metal conduit and method of making the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-904722