US3724150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underfloor entrance means
Assignee: Butler Manufacturing Co
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Filing: 1971-11-17
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Granted: 1973-04-03
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Expires: 1991-11-17
Abstract
Abstract The combination of a fastener, tile trim or adjusting ring, cover and body of an underfloor trench, junction box, etc. The fastener rests on the tile trim or ring underneath the cover. The trim has a pair of openings. A pin secured to the body sticking up through one opening in the trim has a retaining groove flush with the trim surface. The fastener has a keyhole slot fitting in the retaining groove and also has a keeper fitting over the edge of the other trim opening. This holds the fastener.
Inventors
- 👤 F Hudnall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:46
CPC Classifications
F; F16; F16B; F16B5/00; F16B5/06; F16B5/0607; F16B5/0621; F16B5/065; E; E04; E04F; E04F19/00; E04F19/08; F16B2/00; F16B2/20; F16B2/22; F16B2/24; F16B2/241; F16B2/245; F16B21/00; F16B21/06; F16B5/0642; F16B5/0657; F16B5/0664; F16B35/00; F16B35/04; F16B35/041; F16B35/042; F16B35/044; F16B35/048
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
277 words
In an electrical underfloor distribution system: a hollow housing for retaining electrical cables; a cover extending at least partially over said hollow housing, the cover when removed providing an access opening to the housing interior; tile trim means extending at least partially along the peripheral edge of said cover; first and second apertures formed in said tile trim; an adjusting screw mounted on said housing and extending into said first aperture; a ledge formed on said adjusting screw and supporting the said tiLe trim; a retaining slot formed on said screw between said tile trim and said cover; a fastener for securing said cover and said tile trim on said hollow housing, the fastener comprising a generally flat, elongated body resting on top of the tile trim and being formed with a keyhole slot oriented so that its larger portion is inboard of one edge of the body and its smaller portion is located between the larger portion and said one edge with at least part of the smaller portion being disposed within said retaining slot and the body having means on the opposite edge forming a groove within which is disposed part of the tile trim of said second aperture and the body also being formed with a pair of retaining arms extending down from the body through said second aperture and the body further being formed with a pair of sections extending along the body respectively on opposite sides of said keyhole slot and providing strengthening ribs for the body; and a ball stud on said cover and extending between said arms, the arms exerting pressure on the stud to retain the same in position.
Claim 2
Dependent Claim
277 words
In an electrical underfloor distribution system: a hollow housing for retaining electrical cables; a cover extending at least partially over said hollow housing, the cover when removed providing an access opening to the housing interior; tile trim means extending at least partially along the peripheral edge of said cover; first and second apertures formed in said tile trim; an adjusting screw mounted on said housing and extending into said first aperture; a ledge formed on said adjusting screw and supporting the said tiLe trim; a retaining slot formed on said screw between said tile trim and said cover; a fastener for securing said cover and said tile trim on said hollow housing, the fastener comprising a generally flat, elongated body resting on top of the tile trim and being formed with a keyhole slot oriented so that its larger portion is inboard of one edge of the body and its smaller portion is located between the larger portion and said one edge with at least part of the smaller portion being disposed within said retaining slot and the body having means on the opposite edge forming a groove within which is disposed part of the tile trim of said second aperture and the body also being formed with a pair of retaining arms extending down from the body through said second aperture and the body further being formed with a pair of sections extending along the body respectively on opposite sides of said keyhole slot and providing strengthening ribs for the body; and a ball stud on said cover and extending between said arms, the arms exerting pressure on the stud to retain the same in position.
Claim 3
Dependent Claim
267 words
In an electrical underfloor distribution system: a hollow housing for retaining electrical cables; a cover extending at least partially over said hollow housing, the cover when removed providing an access opening to the housing interior; tile trim means connected to said housing and extending at least partially along the peripheral edge of said cover; first and second apertures formed in said tile trim; a head mounted on said housing and extending into said first aperture; a retaining slot formed on said head between said tile trim and said cover; a fastener for securing said cover and said tile trim on said housing, the fastener comprising a generally flat, elongated body resting on top of the tile trim and being formed with a keyhole slot oriented so that its larger portion is inboard of one edge of the body and its smaller portion is located between the larger portion and said one edge with at least part of the smaller portion being disposed within said retaining slot and the body having means on the opposite edge forming a groove within which is disposed part of the tile trim of said second aperture and the body also being formed with a pair of retaining arms extending down from the body through said second aperture and the body further being formed with a pair of sections extending along the body respectively on opposite sides of said keyhole slot and providing strengthening ribs for the body; and a ball stud on said cover and extending between said arms, the arms exerting pressure on the stud to retain the same in position.
Claim 4
Dependent Claim
267 words
In an electrical underfloor distribution system: a hollow housing for retaining electrical cables; a cover extending at least partially over said hollow housing, the cover when removed providing an access opening to the housing interior; tile trim means connected to said housing and extending at least partially along the peripheral edge of said cover; first and second apertures formed in said tile trim; a head mounted on said housing and extending into said first aperture; a retaining slot formed on said head between said tile trim and said cover; a fastener for securing said cover and said tile trim on said housing, the fastener comprising a generally flat, elongated body resting on top of the tile trim and being formed with a keyhole slot oriented so that its larger portion is inboard of one edge of the body and its smaller portion is located between the larger portion and said one edge with at least part of the smaller portion being disposed within said retaining slot and the body having means on the opposite edge forming a groove within which is disposed part of the tile trim of said second aperture and the body also being formed with a pair of retaining arms extending down from the body through said second aperture and the body further being formed with a pair of sections extending along the body respectively on opposite sides of said keyhole slot and providing strengthening ribs for the body; and a ball stud on said cover and extending between said arms, the arms exerting pressure on the stud to retain the same in position.
Claim 5
Dependent Claim
235 words
In an electrical underfloor distribution system: a hollow housing for retaining electrical cables; a ring mounted on said housing; a cover mounted on said ring and extending at least partially over said hollow housing, the cover when removed providing an access opening to the housing interior; an aperture formed in said ring; a head mounted on said ring; a retaining slot formed on said head below said cover; a fastener for securing said cover on said ring, the fastener comprising a generally flat elongated body resting on said ring and being formed with a keyhole slot oriented so that its larger portion is inboard of one edge of the body and its smaller portion is located between the larger portion and said one edge with at least part of the smaller portion being disposed within said retaining slot and the body having means on the opposite edge forming a groove within which is disposed part of said ring aperture and the body also being formed with a pair of retaining arms extending down from the body through said ring aperture and the body further being formed with a pair of sections extending along the body respectively on opposite sides of said keyhole slot and providing strengthening ribs for the body; and a ball stud on said cover and extending between said armS, the arms exerting pressure on the stud to retain the same in position.
Claim 6
Dependent Claim
235 words
In an electrical underfloor distribution system: a hollow housing for retaining electrical cables; a ring mounted on said housing; a cover mounted on said ring and extending at least partially over said hollow housing, the cover when removed providing an access opening to the housing interior; an aperture formed in said ring; a head mounted on said ring; a retaining slot formed on said head below said cover; a fastener for securing said cover on said ring, the fastener comprising a generally flat elongated body resting on said ring and being formed with a keyhole slot oriented so that its larger portion is inboard of one edge of the body and its smaller portion is located between the larger portion and said one edge with at least part of the smaller portion being disposed within said retaining slot and the body having means on the opposite edge forming a groove within which is disposed part of said ring aperture and the body also being formed with a pair of retaining arms extending down from the body through said ring aperture and the body further being formed with a pair of sections extending along the body respectively on opposite sides of said keyhole slot and providing strengthening ribs for the body; and a ball stud on said cover and extending between said armS, the arms exerting pressure on the stud to retain the same in position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |