Sectional strip for roll-up, fold-up, and similar gates
US4718472A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 13, 1987 |
| Grant date | Jan 12, 1988 |
| Priority date | — |
| Expiry date | Jan 13, 2007 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/1566
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A sectional strip 5 with an outward-facing outside 10 and an inside 11 for roll-up, fold-up, and similar gates exhibits at its top 6 and bottom 7 a point of articulation 8 that extends over the total width of the gate for pivoting the adjacent upper and lower, identically shaped sectional strip in relation to the plane of the gate, which consists of the sectional strips that are not rolled up, when rolled up onto the armor of rolled-up sectional strips. The point 8 of articulation at top 6 is in the form of at least one perpendicular cylindrical sector 12 with an outward-facing surface 13 and the point 8 of articulation at bottom 7 is in the form of at least one cylindrical sector 14 with an inward-facing surface 15. The surface at top 6 and the surface at bottom 7 have radii 16 and 17 of curvature that are practically equal in length. The centers 18 and 19 of curvature of the radii of curvature of the surface at top 6 and of the surface at bottom 7 are located on a straight line and are at an equal perpendicular distance from the plane 23 of the gate, which is constituted by the outsides 10 of the sectional strips 5, with both straight lines coinciding with the axis of articulatio…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.