Patent US3768327A successfully refreshed from Google Patents.
Patent US4037383A successfully refreshed from Google Patents.
US4037383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal grating
Assignee: RUSSO ARCHITECTURAL METALS Inc
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Filing: 1976-09-16
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Granted: 1977-07-26
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Expires: 1996-09-16
Abstract
Abstract An improved metal grating employs a series of parallel bearing bars and cross bars passing laterally through longitudinally spaced holes in the bearing bars. Separate spacer members are provided for maintaining spacing between adjacent pairs of bearing bars. The spacers conform to the shape of and may positively engage a cross bar. The cross bars are fabricated having a length shorter than the total of the width of all the bearing bars and spacer members comprising the grating so that when securing means are tightened to locate the cross bars within the grating, the sides of the bearing bars are brought into compressive contact with the edges of the spacer members.
Inventors
- 👤 William H. Diebold
- 👤 Adolph D. Russo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:47
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/42; E04C2/421; E04C2/422; E04C2/425
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
138 words
A metal grating comprising: a plurality of spaced parallel extending bearing bars including a pair of outer bearing bars and a plurality of intermediate bearing bars therebetween, said bearing bars having a plurality of spaced transverse openings along their length with the openings of each bearing bar being aligned with openings of an adjacent bearing bar; a plurality of transverse cross bars each passing through respective aligned openings in said bearing bars; a plurality of spacer members each mounted on a cross bar in the space between adjacent pairs of said bearing bars, means holding said spacer members against rotation on said cross bars, and fastening means acting in conjunction with said outer bearing bars and the ends of said cross bars placing said cross bars in tension and said bearing bars and said spacer members in compression.
Claim 2
Dependent Claim
138 words
A metal grating comprising: a plurality of spaced parallel extending bearing bars including a pair of outer bearing bars and a plurality of intermediate bearing bars therebetween, said bearing bars having a plurality of spaced transverse openings along their length with the openings of each bearing bar being aligned with openings of an adjacent bearing bar; a plurality of transverse cross bars each passing through respective aligned openings in said bearing bars; a plurality of spacer members each mounted on a cross bar in the space between adjacent pairs of said bearing bars, means holding said spacer members against rotation on said cross bars, and fastening means acting in conjunction with said outer bearing bars and the ends of said cross bars placing said cross bars in tension and said bearing bars and said spacer members in compression.
Claim 3
Dependent Claim
32 words
The grating as described in claim 1 wherein at least some of said openings and said cross bars have a noncircular shape which precludes rotation of said cross bars within said openings.
Claim 4
Dependent Claim
24 words
The grating as described in claim 1 wherein said spacer members have leg portions which extend around a substantial portion of said cross bars.
Claim 5
Dependent Claim
112 words
The metal grating as described in claim 1 wherein each of said cross bars includes a pair of longitudinally extending notch portions disposed along said cross bars and said spacer members include a pair of outwardly extending legs having a juncture at one end thereof and a lug at the opposite end thereof which engage said notch portions to positively retain said spacer members on said cross bars, said lugs extending inwardly toward one another to define a space therebetween, said space being such that said spacer members may be snapped in place from the side of said cross bars without exceeding the elastic limit of the material comprising said spacer members.
Claim 6
Dependent Claim
43 words
The metal grating as described in claim 1 wherein said cross bars each have a length which is shorter than the combined total transverse width of said plurality of bearing bars and plurality of spacer members and said fastening means comprises a screw.
Claim 7
Dependent Claim
15 words
The metal grating as described in claim 4 wherein said fastening means comprises a screw.
Claim 8
Dependent Claim
19 words
The metal grating as described in claim 4 wherein each spacer member further includes an upwardly extending tread portion.
Claim 9
Dependent Claim
34 words
The metal grating as described in claim 1 wherein said bearing bars have an I-beam form having top and bottom flange portions and an intermediate web porton, said openings being in said web portion.
Claim 10
Dependent Claim
24 words
The metal grating as described in claim 8 wherein the ends of said spacer members have a shape to conform to said flange portions.
Claim 11
Dependent Claim
42 words
The metal grating as described in claim 4 wherein said openings and said cross bars have a generally pentagonal form, said cross bars having a pair of upper mating surfaces and said legs of said spacer members nest with said mating surfaces.
Claim 12
Dependent Claim
31 words
The metal grating as described in claim 10 wherein said spacer members have a portion extending upwardly from said juncture to be generally flush with the top of said bearing bars.
References Cited (Backward Citations)
GB197100A
Cited
US1606434A
Cited
US2459983A
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US2607089A
Cited
US3378955A
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US3755988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-25 | 1981-01-24 | 1981-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-25 | 1985-01-24 | 1985-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-25 | 1989-01-24 | 1989-07-26 | $7700.00 | Window Closed / Lapsed |