Telescoping grandstand arrangement
US4412403A · kind A · utility
Inventors
Key dates
| Filing date | May 21, 1982 |
| Grant date | Nov 1, 1983 |
| Priority date | — |
| Expiry date | May 21, 2002 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04H3/126
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A transportable grandstand or bleachers designed for seating of persons has a trailer frame mounted on wheels and a tongue or other towing arrangement. A first "top" group of tiers is permanently mounted on the frame and a second "bottom" group of tiers is hingedly jointed on the first group on a hinge axis parallel to the length of the tiers. The second group can be swung about this axis to a travelling position where the second group is folded atop the first group, and can be unfolded into a position for use. The first and second groups of tiers each have a generally hollow prismatic or tubular structure, with similarly shaped inside groups of tiers disposed therewithin. The first and second groups of tiers serve as outside groups and house the associated inside groups of tiers therewithin. The inside groups can be slid laterally out from within said outside groups, in a telescoping fashion, to increase the seating capacity of the arrangement. A rod can be attached to a stiffening number within the outer group and slide in a hole in a corresponding stiffening member in the inside group. A head or knob on the rod limits lateral motion of the inside group so that the latter is not …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.