Grizzly screening apparatus
US6098811A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1996 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | Jul 31, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB07B1/14
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A grizzly screen apparatus has a screen of grizzly bars having first ends mounted in a transverse end member and second ends placed in a slotted comb member having alternating shallow and deep bed slots. The screen is rotatable about a transverse axis whereby the second ends of secondary grizzly bars in the deep bed slots are lowered relative to the second ends of grizzly bars in the shallow bed slots, resulting in simultaneous steepening of the screen and an increase of the interbar distance, to remove obstructing oversize objects from the screen. Each grizzly bar has a transverse lock bar at the first end which retains the grizzly bar within an aperture in the transverse end member without bolts or other fasteners. Obstructions on the grizzly screen may be cleared without the use of manually operated tools, and if desired, may be cleared by remote control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.