US3640035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antislip safety surface
Assignee: Caterpillar Inc
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Filing: 1970-04-27
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Granted: 1972-02-08
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Expires: 1990-04-27
Abstract
Abstract An antislip safety surface consisting of a plate member having a plurality of parallel, spaced corrugations or ridges formed therein, and a plurality of overlapping, spaced rows of apertures formed in said ridges by bending upward the ridge material on either side of a diagonal center cut to produce vertical projections having oppositely sloping edges providing a maximum multidirectional holding effect. In an alternate embodiment, adjacent nonoverlapping rows of apertures have located therebetween a plurality of transverse drain apertures.
Inventors
- 👤 Max E Butterfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:00
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/02; E04F11/104; E04F11/16
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
160 words
An integral antislip safety surface comprising a plate of rigid material having a plurality of spaced, longitudinally oriented corrugations therein defining generally arcuate, vertical ridges, set off by valley portions, a plurality of laterally oriented rows of apertures in said ridges, each of said apertures defining a pair of longitudinally oriented edges and a pair of laterally oriented edges, each aperture having a pair of flanges formed by displacing corrugation material upward when the apertures are formed, said flanges being elongated plate members having an attached length edge secured to each of the longitudinal edges of each of said apertures, said flanges extending vertically upward from the plane of said plate, each flange also having an unattached length edge having a slope with respect to the plane of said plate member, wherein the slope of the unattached length edge of each flange of each pair of flanges is equal and opposite to that of its corresponding flange in the pair.
Claim 2
Dependent Claim
160 words
An integral antislip safety surface comprising a plate of rigid material having a plurality of spaced, longitudinally oriented corrugations therein defining generally arcuate, vertical ridges, set off by valley portions, a plurality of laterally oriented rows of apertures in said ridges, each of said apertures defining a pair of longitudinally oriented edges and a pair of laterally oriented edges, each aperture having a pair of flanges formed by displacing corrugation material upward when the apertures are formed, said flanges being elongated plate members having an attached length edge secured to each of the longitudinal edges of each of said apertures, said flanges extending vertically upward from the plane of said plate, each flange also having an unattached length edge having a slope with respect to the plane of said plate member, wherein the slope of the unattached length edge of each flange of each pair of flanges is equal and opposite to that of its corresponding flange in the pair.
Claim 3
Dependent Claim
34 words
The antislip safety surface of claim 1 wherein successive rows of apertures are located on each ridge in a nonoverlapping manner, and wherein a plurality of transverse drain apertures are located between the rows.
Claim 4
Dependent Claim
32 words
The antislip safety surface of claim 2 wherein said transverse drain apertures define rows between said apertures and wherein each transverse drain aperture is located in alternate valleys in a given row.
Claim 5
Dependent Claim
27 words
The antislip safety surface of claim 3 wherein each transverse drain aperture has a pair of parallel, lateral length edges and a pair of longitudinal width edges.
Claim 6
Dependent Claim
24 words
The antislip safety surface of claim 4 wherein each pair of lateral length edges is of a length to extend across two adjacent ridges.
Claim 7
Dependent Claim
23 words
The antislip safety surface of claim 1 wherein successive rows of apertures are formed in mutually exclusive alternate ridges in successive, overlapping rows.
Claim 8
Dependent Claim
25 words
The antislip safety surface of claim 6 wherein the plate defines a pair of longitudinal plate edges and vertically downwardly oriented support flanges extend therefrom.
Claim 9
Dependent Claim
20 words
The antislip safety surface of claim 7 wherein said support flanges each have laterally inwardly oriented mounting flanges attached thereto.
References Cited (Backward Citations)
US519952A
Cited
US2781703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |