# US 4,391,426 A · Support strip with U-shaped cross-section of plastic material for supporting conduits, cables and the like

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- Number: US 4,391,426 A
- Document ID: US4391426A
- Status: Granted
- Kind: A
- Application number: 06/337,260
- Filed: 1982-01-05
- Granted: 1983-07-05
- Earliest claimed: 1981-01-08
- Inventors: Owe Gothberg
- Web page: https://patentgrep.com/patent/US4391426A

## CPC

- H02G 3/0431: {Wall trunking}
- H02G: INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES

## Abstract

A support strip (FIG. 2) of plastic material with U-shaped cross-section and for supporting conduits, cables etc. has a substantially plane bottom (2) and side walls (3), which support strip (1) in its bottom surface close to the longitudinal edges of the support strip has a groove (5) extending along the entire length of the support strip with opposed grip edges (6,7). The free outer edge of each side wall (3) is formed along its entire length with a substantially cylindric bead (8), the diameter of which is slightly smaller than the width of the groove (5) and greater than the distance between the grip edges. Both beads (8) are located at the same distance from the bottom (2) and in a plane (x) extending perpendicularly to the bottom and in the central longitudinal line of the respective groove. The support strip (1) further comprises two internal support walls (10) spaced from each other and in parallel with the side walls (3), which support walls (10) at their outer end are formed with stop strips (11) for retaining conduits, cables etc. placed in the support strip. The mutual distance between the grooves (5) and, respectively, beads (8) of the support strips is equal, so that two or more support strips can be coupled together, in that the beads (8) of one support strip are pressed into the grooves (5) of the other support strip whereby a snap connection between the support strips is formed.

## Claims

### Claim 1

A support strip of plastic material with substantially U-shaped cross-section for supporting conduits, cables etc. and comprising a substantially plane bottom (2) and side walls (3), characterized in that the support strip (1,15) in its bottom surface at each of its longitudinal outer portions is provided with a groove (5), which extends along the entire support strip (1,15) and along its entire length is formed with opposed grip edges (6,7), that the free outer edge of each side wall (3,16) along its entire length is formed with a bead (8) constituting in cross-section almost a whole circle area, the diameter of which is slightly smaller than the width of the groove (5) and slightly greater than the distance between the grip edges (6,7), and that the beads (8) of the support strip (1,15) are located at equal distance from the bottom (2) of the support strip and in a plane (x) extending perpendicularly to the bottom (2) and in the central longitudinal line of the groove (5).

### Claim 2 (depends on 1)

A support strip as defined in claim 1, characterized in that from the inside of the bottom (2) one or more support walls (10) project in parallel with the side walls (3,16) and spaced from each other, of which support walls the outer edge is formed with stop strips (11) projecting on each side of the respective wall (10), that the side walls (3,16) each have their stop edge or stop strip (12,17) flushing with said stop strips on the support walls, and that all stop strips (11) and stop edges (12,17) have a slightly shorter distance to the bottom (2) of the support strip than the beads (8).

### Claim 3 (depends on 1, 2)

A support strip as defined in claim 1 or 2, characterized in that the support strips (1,15) have the same mutual distance between their grooves (5) and between their beads (8), so that the support strips can be coupled together optionally one adjacent the other, with their grooves and beads engaging with each other.