Mounting & tensioning arrangements for screens
US5615776A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1996 |
| Grant date | Apr 1, 1997 |
| Priority date | — |
| Expiry date | Jul 8, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB07B1/48
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a vibratory screening apparatus, a withdrawable lower fine mesh screen assembly (17) has a screen unit (19) releasably mounted on a grid/frame structure (20). The screen unit (19) has a sheet (21) of mesh material bonded to a grate or lattice (22) of a yieldable material such as a hard rubber, and this lattice (22) and the edges of the mesh (21) are also fixed to relatively rigid side members (23) which are mutually free each from the others. In the structure (20), a rigid grate of support bars (26) supports the lattice (22) with a sliding contact interface, and a frame (28) incorporates pneumatically actuated tensioners (30) and clamps (34A, 34B) respectively for tensioning/locking the screen unit (19) and coupling the screen assembly to the vibratory structure. The tension in the screen unit (19) is adjustable whilst on the structure (20) by virtue of the yieldability of the lattice (22) and its sliding contact interface with the support bars (26). Away from the screen assembly, the screen unit (19) is relaxed and less vulnerable to damage or deterioration of tensioning quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.