Field adjustable bridge crane block
US7255330B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2004 |
| Grant date | Aug 14, 2007 |
| Priority date | — |
| Expiry date | Feb 7, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66D3/08
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A field adjustable block for use with a bridge crane having a rotating cylindrical drum for rope. The block includes a cylindrical center pin having a key way recess parallel to an axis of the center pin. An inner side plate has an opening therethrough and an extending key receivable in the key way recess to prevent rotation of the inner side plate. Multiple sheaves are receivable over the center pin. At least one toroidal spacer is receivable over the center pin. A lock washer has an inwardly extending key receivable in the key way recess of the center pin and has a plurality of radially extending tabs. A nut has at least one notch to receive one of the extending tabs therein. An outer side plate is removably attached to the inner side plate by fasteners.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.