Linkage mechanism for an extendable asphalt paver screed
US5924819A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 23, 1998 |
| Grant date | Jul 20, 1999 |
| Priority date | — |
| Expiry date | Jan 23, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C2301/20
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An asphalt paver screed includes a linkage mechanism connecting a main screed and at least one extender screed. The linkage mechanism controls movement of the extender screed relative to the main screed (via a pair of upper and lower frames connecting the extender screed and main screed) along three generally perpendicular axes. The linkage mechanism includes a plurality of links with at least one elongate lateral link extending along a lateral axis generally parallel to a first horizontal axis, at least one elongate fore/aft link extending along a fore/aft axis generally parallel to a second horizontal axis, and at least one selectively length-adjustable link extending along an axis generally parallel to a third vertical axis. The length adjustable link permits selective adjustment of vertical spacing and sloping between the main screed and the extender screed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.