Perimeter debris net lifting system
US4892169A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 21, 1989 |
| Grant date | Jan 9, 1990 |
| Priority date | — |
| Expiry date | Feb 21, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04G21/3266
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A perimeter debris net lifting system employs a plurality of lifting units which support a debris net for a high rise-type construction structure. The lifting units comprise a pair of frame assemblies which are slidably coupled and essentially scale the structure to raise the debris net as construction progresses. Each of the frame assemblies are independently mountable to two floors of the structure. Each lifting unit is vertically displaced by disengaging one of the frame assemblies from its mounting engagement and lifting the frame assembly while the other frame assembly remains securely fixed to the structure. The debris net remains fully extended and functional during the vertical lifting process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.