Gangway element

• US 3,943,589 A
• Filed: 11/05/1974
• Issued: 03/16/1976
• Est. Priority Date: 11/05/1974
• Status: Expired due to Term

• Current Assignee: Peder Fahrsen Pedersen
• Original Assignee: Peder Fahrsen Pedersen
• Inventors: Pedersen, Peder Fahrsen
• Primary Examiner(s): Byers, Nile C.
• Application Number:
  US05/521,087
• Time in Patent Office: 497 Days
• Field of Search: 14/73, 14/72, 52/180, 404/19, 404/20, 404/34
• US Class Current: 14/69.5
• CPC Class Codes: E01C 5/16 made of metallic units with a filling or ground plate of other material E01C5/22; for temporary pavings E01C9/083; steel gratings E01C9/10
• CPC Class Codes: E01D 19/125 Grating or flooring for bridges waterproofing thereof E01D19/083; floors in general E04B5/00
• CPC Class Codes: E01D 2101/30 Metal E01D2101/26 takes precedence
• CPC Class Codes: E04F 15/06 of metal, whether or not in combination with other material gratings as building elements E04C2/42 ; of elements with a metal upper layer; E04F15/02405 takes precedence; metal treads E04F11/112
• CPC Class Codes: Y02A 30/60 Planning or developing urban green infrastructure

Abstract

A skid-proof gangway element in the form of a metal sheet having large holes with upwardly pressed edges and small holes arranged between the large holes and having downwardly pressed edges. The sheet material between the large holes is inclined toward the small holes so as to allow oil to be drained off. The upwardly pressed edges of the large holes provide skid-proof zones.

Claims

1. A gangway element of improved skid-proof properties, comprising a metal sheet having rows of large holes and small holes alternately, the size of the large holes being less than the width of the shoe of a person walking on said gangway, the holes in adjacent rows being out of registry so that each large hole is in alignment with a small hole of the adjacent rows, the edges of the large holes and the small holes being oblique with respect to the plane of the sheet, the edges of the large holes being pressed upwardly, the edges of the small holes being pressed downwardly, the edges of the larger holes merging with the edges of the small holes, whereby all the portions between the holes are inclined towards the small holes.

2. A plurality of elements according to claim 1 fastened to each other by conventional means.

3. A plurality of elements according to claim 1 arranged side by side and connected by spacing members.

4. A gangway element as claimed in claim 1 wherein the large holes and the small holes are substantially circular.

5. A gangway element as claimed in claim 1 wherein the centers of the large holes are placed at the vertices and at the intersections of the diagonals of rectangles arranged in a pattern, the centers of the small holes being placed at the centers of the sides of the rectangles.

6. A gangway element as claimed in claim 1 wherein the metal sheet is formed as a channel the holes being formed in the largest flange of the channel that serves as a walking surface.

7. A gangway element as claimed in claim 6 wherein the channel section has the form of an inverted U.