Threaded ceiling hook with anti rotation washer
US6676350B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2002 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Sep 11, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B39/32
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A ceiling hook (H) comprises a fastener (F) for anchoring in a support structure, and a locking ring in the form of an anti-rotation washer (W). The washer (W) includes anchoring teeth (34) for stationarily mounting the washer (W) to the ceiling. The hook member (12) and the washer (W) comprise co-operating locking ratchet elements (22, 28) for locking the fastener (F) to the washer (W) and thus preventing the fastener (F) from loosening from the ceiling. The washer (W) defines at a central opening (30) thereof at least one notch (32) with the fastener (F) defining at least one tab with (26), the notch (32) being slidable through the tab (26) for mounting the washer (W) to the fastener (F) and then allowing it to rotate between the tab (26) and the book member (12), whereby the washer (W) is prevented from being removed from the fastener (F) unless the tab (26) and notch (32) are aligned.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.