Span lock with centering guide
US6701562B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 16, 2002 |
| Grant date | Mar 9, 2004 |
| Priority date | — |
| Expiry date | Aug 16, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01D15/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A span lock system for a double-leaf drawbridge. A guide housing mounted at the tip of one leaf includes an opening with vertically opposed cushioned shoes slidably supporting an elongate lock bar reciprocative lengthwise in a direction along the length of the drawbridge. A receiver housing mounted at the tip of the other leaf is positioned to interlock with the guide housing and includes a like opening slidably receiving the lock bar between vertically opposed cushioned shoes. A pair of vertical guide columns project from both side of the guide housing opening with the upper and lower edges of the distal sides beveled inwardly, and another pair of vertical guide columns project from both side of the receiver housing opening with the upper and lower edges of the proximal sides beveled outwardly. Within a specified maximum limit of misalignment, the guide and receiver columns interengage causing their openings to closely align and facilitate insertion of the lock bar into the opening of the receiver housing with limited horizontal bending and shear. The distance between the proximal sides of the receiver housing exceeds the distance between the distal sides of the guide housing by a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.