Electricity: conductors and insulators – Overhead – Towers – poles or posts
Reexamination Certificate
1998-10-07
2001-04-24
Reichard, Dean A. (Department: 2831)
Electricity: conductors and insulators
Overhead
Towers, poles or posts
C174S068100, C220S004020
Reexamination Certificate
active
06222120
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention concerns an accessory for electrical wiring conduit, typically a conduit comprising a channel section made of a relatively soft semi-rigid material, for example an extruded plastics material; the invention is more particularly concerned with an accessory that is useful or necessary at certain locations on the conduit and can be mounted on and fixed to the channel section automatically “from the front” without using any additional fixing means implying the use of glue or screws, for example.
In terms of its application, the accessory may consist in a conduit end-piece intended to close off the end of a conduit, a conduit cover joint for covering two adjacent ends of two lengths of a section constituting the cover of the channel section or a conduit corner covering device used at locations where the conduit changes direction.
2. Description of the Prior Art
In the remainder of the description the accessory to which the description more particularly applies is an end-piece adapted to be fixed to one end of a conduit of the above kind. One end-piece of the above type for closing off the end of a conduit when wiring is completed known in itself is shaped and sized to engage axially within the conduit consisting of the channel section and its cover. To resist impacts and other loads the accessory is screwed or glued to the wall and/or to the conduit. It must be engaged from the end.
In the most usual situation the cover is fitted after fixing the end-piece. In the case of a cover end-piece, the cover must be engaged under the end-piece before it is clipped to the back. If the end of the conduit is near a corner, mounting is complicated because the end-piece must be fixed to the back of the conduit before fixing the back to the wall.
The invention avoids these complicated and tiresome operations by proposing an accessory (typically an end-piece) that can be mounted from the front, i.e. in a direction perpendicular to the axis of the conduit and fixed and immobilized by simple forcible nesting perpendicular to the longitudinal direction of said channel section.
SUMMARY OF THE INVENTION
To be more precise, the invention consists in an electrical wiring conduit accessory, said conduit including a channel section made of a relatively soft material, for example an extruded plastics material, having a back in the form of a strip and two longitudinal flanges extending from respective edges of said strip, which accessory includes a covering part shaped and sized to be able to cap a portion of a channel section of the above kind by nesting over it and said covering part includes internally at least one lateral groove defined and located so that one of the aforementioned flanges of said channel section engages therein during mounting of said accessory, said lateral groove containing relatively sharp ribs adapted to be become embedded in at least one flange of a channel section of the above kind during mounting of said accessory perpendicularly to the longitudinal direction of said channel section.
With an arrangement of the above kind the accessory mounted by forcible engagement on the channel section is immediately immobilized in the longitudinal direction by notching of the edges thereof. The accessory further includes clipping means cooperating with structural elements of said channel section to immobilize it transversely to the longitudinal direction of the channel section. The aforementioned structural elements can be longitudinal grooves opening externally on the flanges of the channel section and often intended for mounting the cover. In this case the cover is cut shorter and the accessory nests over the channel section, covering it over a certain distance.
The accessory advantageously includes two such parallel lateral grooves adapted to cooperate with respective parallel flanges of the channel section.
The channel section conventionally includes a bead, for example a cylindrical bead, on the edge of each longitudinal flange. The sharp ribs formed in the aforementioned lateral groove or grooves can make cuts, preferably in the beads, upon forcible mounting of the accessory perpendicular to the longitudinal direction of the channel section.
The invention will be more clearly understood and other advantages of the invention will become more clearly apparent from the following description of an accessory in accordance with the invention given by way of example only and with reference to the accompanying drawings.
REFERENCES:
patent: 3262083 (1966-07-01), Gooding
patent: 3721762 (1973-03-01), Gooding
patent: 3786171 (1974-01-01), Shira
patent: 3938767 (1976-02-01), Norris
patent: 5134250 (1992-07-01), Caveney et al.
patent: 5235136 (1993-08-01), Santucci et al.
patent: 5435606 (1995-07-01), Navazo
patent: 5523529 (1996-06-01), Holliday
patent: 5591938 (1997-01-01), Navazo
patent: 5869786 (1999-02-01), Jaakkola et al.
patent: 0518404 (1992-12-01), None
patent: 2311419 (1997-09-01), None
Albert Christophe
Portier Robert
Browdy and Neimark
Patel Dhiru R
Planet Wattohm
Reichard Dean A.
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