US3742671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holddown fastening clip with grating and sub-support structures
Assignee: Kadee Industries Inc
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Filing: 1971-11-09
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Granted: 1973-07-03
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Expires: 1991-11-09
Abstract
Abstract A U-shaped fastener clip for fastening down barred gratings such as the parallel barred gratings frequently used for entranceways and elevator floors. The fastener clip is located below the upper level of the bars between two supporting joists of the floor gratings to which the bars are integrally connected. Slotted extensions on each end of the clip fit between the bars and engage the joists. The bottom part of the clip includes fastening means which engage a supporting sub-structure. In position, the clip lies entirely below the surface of the grating thus providing a blind or substantially concealed fastening.
Inventors
- 👤 W Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:44
CPC Classifications
E; E04; E04F; E04F19/00; E04F19/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
59 words
An open barred grating structure comprising in combination cross support members, open barred grating rigidly mounted thereon, a sub-support structure, generally U-shaped blind fastener means comprising a bottom, two sides, and side edges terminating in multiple slotted lateral extensions adapted to engage said support members between said grating bars, and attachment means joining said bottom to said sub-support structure.
Claim 2
Dependent Claim
59 words
An open barred grating structure comprising in combination cross support members, open barred grating rigidly mounted thereon, a sub-support structure, generally U-shaped blind fastener means comprising a bottom, two sides, and side edges terminating in multiple slotted lateral extensions adapted to engage said support members between said grating bars, and attachment means joining said bottom to said sub-support structure.
Claim 3
Dependent Claim
18 words
The grating structure of claim 1 wherein said side edge extensions are oppositely directed from substantially parallel sides.
Claim 4
Dependent Claim
43 words
The grating structure of claim 1 wherein said bottom includes an elongated slot, and said attachment means include an Allen Head screw extending through said elongated slot, engaging said sub-support structure and accessible by an Allen Head wrench passing between adjacent grating bars.
Claim 5
Dependent Claim
20 words
The grating structure of claim 1 wherein said bottom is crowned to provide added lateral spring action to the sides.
Claim 6
Dependent Claim
23 words
The grating structure of claim 1 wherein said bottom includes ribs extending perpendicular to said sides to provide added rigidity to said bottom.
Claim 7
Dependent Claim
70 words
A floor structure comprising in combination an open barred grating, cross support joists rigidly fastened to said grating, a sub-support structure, a plurality of generally U-shaped fastener means providing spaced attachment points each comprising a bottom, two sides, and side edges terminating in multiple slotted lateral extensions adapted to engage said support joists between said grating bars, and a plurality of attachment means engaging said bottoms and said sub-support structure.
Claim 8
Dependent Claim
70 words
A floor structure comprising in combination an open barred grating, cross support joists rigidly fastened to said grating, a sub-support structure, a plurality of generally U-shaped fastener means providing spaced attachment points each comprising a bottom, two sides, and side edges terminating in multiple slotted lateral extensions adapted to engage said support joists between said grating bars, and a plurality of attachment means engaging said bottoms and said sub-support structure.
Claim 9
Dependent Claim
34 words
The floor structure of claim 5 wherein said bottoms include an elongated slot and said attachment means include threaded fastener means accessible through adjacent grating bars and engaging said bottom and said sub-support structure.
References Cited (Backward Citations)
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US2353531A
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US2705550A
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US2839671A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |