Patent US3925946A successfully refreshed from Google Patents.
US3925946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reticulated grating
Assignee: United States Gypsum Co
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Filing: 1973-11-16
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Granted: 1975-12-16
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Expires: 1993-11-16
Abstract
Abstract An improved reticulated grating comprising an apertured sheet and serrations projecting from the aperture edges of at least one of the surfaces of the sheet, each of the serrations of each aperture being skewed with respect to the next adjacent serration, to increase frictional resistance.
Inventors
- 👤 Henry A Balinski
- 👤 Albert F Kuhr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:54
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/42; E04C2/427; E04F; E04F11/00; E04F11/02; E04F11/104; E04F11/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
In a grating including a sheet having opposite surfaces and apertures therein, said apertures being defined by side walls, each said side wall extending transversely across the sheet to opposite edge portion which are spaced apart by a distance greater than the thickness of said sheet, the side wall edge portions projecting from at least one of said sheet surfaces being provided with serrations thereon to reduce slippage over the sheet; the improvement wherein at least alternate serrations are each twisted through an angle with respect to the plane of the edge portion of the aperture, the resulting structure being so arranged that each of said serrations is skewed with respect to the next adjacent serration of that edge portion whereby slippage over the sheet is further reduced.
Claim 2
Dependent Claim
128 words
In a grating including a sheet having opposite surfaces and apertures therein, said apertures being defined by side walls, each said side wall extending transversely across the sheet to opposite edge portion which are spaced apart by a distance greater than the thickness of said sheet, the side wall edge portions projecting from at least one of said sheet surfaces being provided with serrations thereon to reduce slippage over the sheet; the improvement wherein at least alternate serrations are each twisted through an angle with respect to the plane of the edge portion of the aperture, the resulting structure being so arranged that each of said serrations is skewed with respect to the next adjacent serration of that edge portion whereby slippage over the sheet is further reduced.
Claim 3
Dependent Claim
34 words
The improved grating as defined in claim 1, wherein less than one half of said serrations projecting from one of said surfaces is skewed with respect to said edge portion from which they project.
Claim 4
Dependent Claim
14 words
The improved grating as defined in claim 2, wherein said apertures are diamond shaped.
Claim 5
Dependent Claim
35 words
The improved grating as defined in claim 3, wherein for at least one of said surfaces, each of said skewed serrations is generally parallel to the skewed serration diagonally opposite to it in that aperture.
Claim 6
Dependent Claim
44 words
The improved grating as defined in claim 1, wherein said grating has a longitudinal axis and a transverse axis, the apertures are in rows, and wherein the apertures of each row are longitudinally offset with respect to the apertures of the next adjacent row.
Claim 7
Dependent Claim
43 words
The improved grating as defined in claim 5, wherein the adjacent apertures of each row are joined by a saddle, said saddle of each row being located generally in a single plane, the planes of said saddles of adjacent rows being spaced apart.
Claim 8
Dependent Claim
14 words
The improved grating as defined in claim 1, wherein said apertures are diamond shaped.
Claim 9
Dependent Claim
49 words
The improved grating as defined in claim 1, wherein the apertures are in rows and the adjacent apertures of each row are joined by a saddle, said saddle of each row being located generally in a single plane, the planes of said saddles of adjacent rows being spaced apart.
Claim 10
Dependent Claim
127 words
In a grating including a sheet having opposite surfaces and apertures therein, said apertures being defined by side walls, each said side wall extending transversely across the sheet to opposite edge portions which are spaced apart by a distance greater than the thickness of said sheet, the side wall edge portions projecting from at least one of said sheet surfaces being provided with serrations thereon to reduce slippage over the sheet; the improvement wherein at least alternate serrations are each twisted through an angle with respect to the plane of the edge portion of the aperture, the resulting structure being so arranged that each of said serrations is skewed with respect to said aperture edge from which it projects whereby slippage over the sheet is further reduced.
Claim 11
Dependent Claim
127 words
In a grating including a sheet having opposite surfaces and apertures therein, said apertures being defined by side walls, each said side wall extending transversely across the sheet to opposite edge portions which are spaced apart by a distance greater than the thickness of said sheet, the side wall edge portions projecting from at least one of said sheet surfaces being provided with serrations thereon to reduce slippage over the sheet; the improvement wherein at least alternate serrations are each twisted through an angle with respect to the plane of the edge portion of the aperture, the resulting structure being so arranged that each of said serrations is skewed with respect to said aperture edge from which it projects whereby slippage over the sheet is further reduced.
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |