Portable support boom for window washer
US4801117A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 25, 1988 |
| Grant date | Jan 31, 1989 |
| Priority date | — |
| Expiry date | Jan 25, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04G3/34
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A portable support boom for window washers is provided on a support frame which has extendable boom sections that can be folded into a collapsed position and includes transporting wheels and handles so that the boom can be manually rolled from one place to another. When at the work site, the boom sections can be unfolded, then can be used either in extended or retracted position. A support frame attaches to the folded booms when in collapsed position and can be erected to form a triangular configuration for supporting extending end of the boom when in the work position. Support wheels are provided on the support frame for moving the boom laterally between different work positions at the same work site. A brake can be provided to releasably lock the support wheels at each work position. Also, the support frame can be selectively pivoted at each work position to bring the transporting wheels into contact with the supporting surface to inhibit lateral movement of the boom during use. Upon completion of the job, the boom can easily be dissembled into a collapsed position for wheeling by one person to another location.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.