Restraint edge for paving members
USRE33550E · kind E · reissue
Inventor
Key dates
| Filing date | Apr 19, 1990 |
| Grant date | Mar 12, 1991 |
| Priority date | — |
| Expiry date | Apr 19, 2010 |
Classification
- Technology area (CPC —)General
Abstract
Landscaping support apparatus is provided which includes substantially vertical strip restraining elements for defining a boundary around hard surface elements. The vertical strip restraining elements include an inner surface facing toward the hard surface elements for receiving substantially horizontal forces from the hard surface elements. Horizontal extension elements are provided which extend out from an outer surface of the vertical strip restraining elements in at least the lower region of the upright strip restraining elements for receiving vertical forces relative to the ground surface. Force converting elements are provided for converting the horizontal forces received by the vertical strip restraining elements into vertical forces against the horizontal extension elements, thereby restraining the hard surface elements in the boundary. Attaching elements are provided which permit a detachable mounting of at least one of the horizontal extension elements and the force converting elements to the vertical strip restraining elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.