Fiberglass grating formed of interlocked pultruded fiberglass grating bars
US4760680A · kind A · utility
Inventor
Key dates
| Filing date | Apr 27, 1987 |
| Grant date | Aug 2, 1988 |
| Priority date | — |
| Expiry date | Apr 27, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/206
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A fiberglass reinforced molded resin grating is formed of first and second sets of mutually parallel, interlocking fiberglass reinforced molded resin bars with the sets extending transversely to one another. One set consists of bearing bars of rectangular cross section including at longitudinally spaced positions within an upper edge, inverted U-shaped notches including oppositely directed, downwardly and outwardly oblique slots terminating at their upper ends adjacent the upper edge of the bearing bars in upwardly and outwardly diverging oblique cam surfaces. The second set of bars consist of cross bars of inverted U-shaped cross section including a horizontal base portion and a pair of downwardly and outwardly diverging legs of a thickness equal to the width of the diverging slots and being respectively received in said slots. The legs of the cross bars at longitudinally spaced position are provided with rectangular locking notches from the free ends upwardly of a width generally equal to the thickness of the bearing bars and of a height which is less than the vertical height of the cross bars. The cross bars are forced downwardly at the locking notches into the inverted U-shaped…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.