| Patents for B07B 1 - Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like (18,540) |
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| 04/17/1991 | CN1012342B Vertical pressure-tight mechanism |
| 04/17/1991 | CA2027385A1 Method for processing domestic, industrial and other similar waste with the production of a cellulose material |
| 04/11/1991 | DE3936021A1 Sepg. undersized root-crop residues - using slotted floor vibrated vertically from below with adjustable frequency and amplitude |
| 04/11/1991 | DE3933145A1 Kontrollsiebungs-verfahren und sichter zu dessen durchfuehrung Kontrollsiebungs-classifier procedures and rules for its |
| 04/10/1991 | CN2074683U Easy adjusting sieve centrifugal powder extracting device |
| 04/09/1991 | US5006228 Mounting system for increasing the wear life of a vibrating screen panel |
| 04/03/1991 | EP0419585A1 Modular system. |
| 04/03/1991 | CN2074211U Hanging device for high square flat screen |
| 04/02/1991 | US5003833 Gyrating drive for particle screening machine |
| 04/02/1991 | US5003731 Belt conveyor system for a conveyor belt fashioned as a braided web |
| 03/27/1991 | EP0419033A1 Improvements relating to vibratory sifters |
| 03/27/1991 | EP0418981A1 A roller screen unit |
| 03/27/1991 | CN2073777U Self-motion sand screen |
| 03/26/1991 | US5002656 Rotary grid-structure bucket for separating from each other fine and coarse particles of sizable materials or products |
| 03/21/1991 | DE3926451C1 Roll grizzly for sizing minerals - has sizing openings kept clear during screening using lifters to eject lumps jamming in holes |
| 03/20/1991 | EP0417408A1 Process for making a screen drum and screen drum made according to the process |
| 03/14/1991 | DE3930575A1 Sorting device with vertical rotor axis - has wheel with conveyor elements rotatable near screen plate |
| 03/13/1991 | EP0375739A4 Water clarification system adapted for removing particulate matter of greater than a predetermined size |
| 03/13/1991 | CN2072873U Automatic winder for screen strips ring |
| 03/13/1991 | CN2072872U Screen, having internally laid, double eccentric axis linear oscillating |
| 03/12/1991 | US4998675 Solid waste processing unit |
| 03/12/1991 | US4998625 Riprap separation apparatus and method |
| 03/06/1991 | CN2072444U Inclination-changing equal thick screen |
| 03/06/1991 | CN2072443U Curing refuse series cylinder screen |
| 03/06/1991 | CN2072442U Screening materials carrying and hoisting device |
| 03/06/1991 | CN2072441U 自动筛 Automatic screen |
| 02/28/1991 | DE4012802A1 Operating system for multi-deck sieve - has superimposed vibrations to ensure sieving of lump-forming materials |
| 02/27/1991 | EP0252938B1 An arrangement for the separation of waste materials |
| 02/27/1991 | CN2071986U Hand rotary accelerating screening machine |
| 02/26/1991 | US4995966 Sifter-screening machine for bulk material |
| 02/21/1991 | WO1991001816A1 Bar screen having a reciprocating action |
| 02/21/1991 | WO1991001815A1 A rotating screen |
| 02/21/1991 | CA2068879A1 Rotating screen |
| 02/13/1991 | CN2071092U Cylinder screen powder filter |
| 02/13/1991 | CN1011578B Screw grading oscillating screen |
| 02/06/1991 | EP0411803A1 A rotating screen |
| 02/06/1991 | EP0411421A1 Process for the production of a filter and filter produced thereby |
| 02/06/1991 | CN2070649U Vibrating type screen |
| 02/05/1991 | US4990023 Joint for assembling of sieve elements |
| 02/05/1991 | US4989464 Method and apparatus for determining particle size distribution |
| 02/03/1991 | CA2021723A1 Process for the manufacture of a filter and the filter then manufactured |
| 01/30/1991 | EP0410808A2 A lifting conveyor, and an agricultural separator incorporating a lifting conveyor |
| 01/30/1991 | EP0410807A1 Agricultural separator |
| 01/29/1991 | US4988005 Sifter |
| 01/25/1991 | CA2017428A1 Method and apparatus for determining particle size distribution |
| 01/23/1991 | EP0409659A1 A mobile material screening apparatus |
| 01/22/1991 | US4986900 Sectional screen cylinder |
| 01/22/1991 | US4986422 Method of screening solid materials and apparatus for performing same |
| 01/22/1991 | CA1279235C Screens, a method of making screens and apparatus for making screens |
| 01/16/1991 | EP0407382A1 Automatic particle-size analyzer with divided drum |
| 01/16/1991 | CN2069310U Electric sieve |
| 01/16/1991 | CN2069309U Semi-automatic diagonal-flow winnowing vibration screen |
| 01/08/1991 | US4983281 Metal detector scoop sifter |
| 01/08/1991 | US4983280 Screening apparatus |
| 01/03/1991 | DE3920918A1 Drum sieve for sifting soil and compost - has drum rolling on two parallel vehicle axles with pneumatic tyres |
| 01/02/1991 | EP0405943A1 A grading machine |
| 01/02/1991 | EP0405477A1 Sieving device |
| 01/02/1991 | CN2068428U Chinese chestnut screening machine |
| 01/01/1991 | US4981204 Mobile material-handling apparatus |
| 12/26/1990 | CN2068088U Power-leakage screening pipe |
| 12/26/1990 | CN2068019U Rotary electric sieve |
| 12/25/1990 | US4979624 Sizing apparatus and proportional spacing mechanism |
| 12/25/1990 | US4979623 Combined tool for retrieving buried objects |
| 12/12/1990 | CN2067190U Three-layers rolling classifying sieve |
| 12/12/1990 | CN2067189U Stone-pushing sieve |
| 12/12/1990 | CN2067188U Revolving woodblock separator |
| 12/11/1990 | CA1277633C Method and apparatus for separating from excavated materials the fine and coarse constituents thereof |
| 12/05/1990 | EP0400156A1 Rear dump truck and transportation method of granular cargo using the same |
| 12/05/1990 | CN2066772U Vibrating screen board |
| 12/05/1990 | CN2066771U Three-unit multi-layer vibrating screen filting machine |
| 12/05/1990 | CN2066770U Nylon revolving screen for sewage treatment |
| 12/04/1990 | CA1277284C Louvered chip screener and method of sizing chips according to thickness |
| 11/28/1990 | EP0399614A1 Method of grading crops according to square size and apparatus for carrying out the method |
| 11/28/1990 | CN2066357U Screen plate for ore-dressing cylindric screen of gold exploitation ship |
| 11/27/1990 | US4972960 Disk screen with compressible spacers and flanged surrounds |
| 11/27/1990 | US4972959 Compressible ring spacer disk screen |
| 11/20/1990 | US4971684 Compact machine and process for preparation prior to dry-grinding of grain type foodstuffs and feedstuffs |
| 11/20/1990 | CA1276509C Particle displacement |
| 11/14/1990 | CN2065612U Automatic iron chippings removing conveyer |
| 11/06/1990 | US4968366 Method of manufacture of tension screens |
| 11/06/1990 | CA1275975C Method and apparatus for cleaning of screen-cloths in particular at vibrating screening equipment |
| 10/31/1990 | EP0394627A1 Screen frame |
| 10/30/1990 | US4966689 Self-cleaning grate assembly |
| 10/30/1990 | US4966686 Fine metal recovery apparatus |
| 10/24/1990 | EP0393492A2 Electromagnetic vibrating system |
| 10/11/1990 | DE3911234A1 Screen |
| 10/10/1990 | EP0316328A4 Improved screen construction |
| 10/09/1990 | US4961722 Conical screen for a vertical centrifugal separator |
| 10/09/1990 | CA1275071A1 Gyratory screening apparatus with stepped arrangement |
| 10/05/1990 | WO1990012147A1 Sectional screen cylinder |
| 10/02/1990 | US4960510 Screening apparatus having a screen grid with a plurality of exchangeable screen elements |
| 09/25/1990 | CA1274486A1 Disk screen disk spacer and shaft assemblies and a method of making same |
| 09/19/1990 | CN2062260U Sieve protector for rice machine |
| 09/19/1990 | CN1009621B Wet vibrating grader |
| 09/19/1990 | CN1009620B Apparatus and method for cleaning particle food and fodder in dry way |
| 09/18/1990 | US4957618 Vertical screening device |
| 09/18/1990 | US4957010 Method and apparatus for determining particle size distribution |
| 09/18/1990 | CA1274189A1 Filtering screens and methods of production thereof |
| 09/13/1990 | DE4001175A1 Cleaning system for screening machines - uses periodic increase in tension of screw mesh to free blockages |
| 09/13/1990 | DE3907777A1 Vibrating screen for separating unshaped granules |