Self-anchoring poke-through wiring device
AssigneeHubbell Incorporated
InventorEmil S. Wuertz
Life of this patent
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Abstract
A self-anchoring flush-type poke-through electrical wiring fitting which is adapted to be positioned in a floor aperture which is formed in a concrete building floor, for enabling the conducting of electrical power and telecommunication signals between the work spaces of multi-storied buildings. A retainer clip is engaged between a floor cup structure and disc-shaped fire barrier inhibiting displacement of the retainer clip. The retainer clip is constructed of a cold-worked stainless steel material, preferably such as type 302 or 304 annealed stainless steel possessing a minimal degree of resilience.
Claims11
A self-anchoring poke-through wiring device for insertion into a passage extending through a concrete floor aperture of a building structure to facilitate transmission of electrical power and telecommunication signals between a service head and a junction box located at opposite sides of the floor;
- said wiring device comprising a cover plate structure positionable above the upper face of said floor so as to cover the floor aperture;
- channel means extending through said floor aperture for conducting insulated wires and telecommunication signals through said floor aperture between said junction box and said service head;
- fire retarding structure being fixedly connected to at least the upper end of said channel means for sealing the aperture in response to encountered heat and fire to form a fire barrier in said floor aperture;
- a floor cup for the receipt of electrical connectors extending between said fire retarding structure and said cover plate structure, said floor cup having a disc-shaped base fastened to said fire retarding structure and upstanding leg portions extending from said base having free distal ends fastenable to said cover plate structure;
- and generally rigid non-resilient metallic retainer clip means being interposed between said floor cup and said fire retarding structure, said retainer clip means including diametrically opposite end portions frictionally engageable with the wall surface of said floor aperture for securely anchoring said wiring device in said floor aperture against rotational movement and upward displacement while enabling downwardly displacement of the fitting, outer end portions of the retainer clip means having prongs formed thereon for engaging the wall surface of the floor aperture in frictional contact, said outer end portions of the retainer clip means each being bent upwardly at an angle of between about 40.degree. to 50.degree. relative to the plane of a flat center portion of said clip means, said retainer clip means being constituted of a corrosion-resistant annealed stainless steel having cold-worked portions in at least the bent portions of said retainer clip means.
Dependencies are inferred from the claim text.