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Class Information
Number: 209/389
Name: Classifying, separating, and assorting solids > Sifting > Elements > Clearers > Wipers > Rotating
Description: Devices wherein rotating devices wipe the surfaces of sifters to keep the sifting passages open or clear.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6830207 |
Screen cleaning and comminuting system |
Dec. 14, 2004 |
| 6719145 |
Arrangement and rotor for screening of pulp |
Apr. 13, 2004 |
| 6669025 |
Screen |
Dec. 30, 2003 |
| 6364119 |
Screening device and apparatus including same |
Apr. 2, 2002 |
| 6325215 |
Method and apparatus for separating elastomeric particulates and fibers from a pulverized mixture |
Dec. 4, 2001 |
| 6305552 |
Apparatus for removing matter from tobacco stems |
Oct. 23, 2001 |
| 6253928 |
Grain grader |
Jul. 3, 2001 |
| 6193073 |
Paper stock screening apparatus and method |
Feb. 27, 2001 |
| 6126016 |
Screening device and apparatus including same |
Oct. 3, 2000 |
| 6050422 |
Rotary sweep scalper |
Apr. 18, 2000 |
| 5967335 |
Screening device for screening a suspension |
Oct. 19, 1999 |
| 5915567 |
Screen accessory for screen and screening process |
Jun. 29, 1999 |
| 5605233 |
Trommel cleaner |
Feb. 25, 1997 |
| 5601192 |
Pressure sorter for fiber suspensions |
Feb. 11, 1997 |
| 5593042 |
Quality-control sieve and method of using it |
Jan. 14, 1997 |
| 5509536 |
Method and apparatus for the sorting of fiber suspensions |
Apr. 23, 1996 |
| 5458246 |
Horizontal cylindrical sifter with adjustable agitator arms |
Oct. 17, 1995 |
| 5310065 |
Self-cleaning coal bypass and debris separation grid assembly with rotary clearing mechanism |
May. 10, 1994 |
| 5238117 |
Mineral processing screen separator |
Aug. 24, 1993 |
| 5186834 |
Scraper filter system |
Feb. 16, 1993 |
| 5133852 |
Coal sizing grid |
Jul. 28, 1992 |
| 5106488 |
Device for separating particles from flowing medium |
Apr. 21, 1992 |
| 4935124 |
Rotatable wood chip classifier |
Jun. 19, 1990 |
| 4880539 |
Filter for filtering solids out of a liquid having a doctor blade wiping means |
Nov. 14, 1989 |
| 4857180 |
Rotating disc screen |
Aug. 15, 1989 |
| 4839035 |
Cylindrical screen separator with spirally arranged clearing and conveying blades |
Jun. 13, 1989 |
| 4744894 |
Fibrous stock screening apparatus |
May. 17, 1988 |
| 4717471 |
Apparatus for screening paper fiber stock |
Jan. 5, 1988 |
| 4680108 |
Screening device |
Jul. 14, 1987 |
| 4673502 |
Fixed filter drum and movable scraper |
Jun. 16, 1987 |
| 4601819 |
Sorting apparatus for fiber stock, especially for manufacturing paper |
Jul. 22, 1986 |
| 4543181 |
Medium consistency flat disk pressure screen |
Sep. 24, 1985 |
| 4462901 |
Apparatus for screening fibrous stock |
Jul. 31, 1984 |
| 4389315 |
Filter device with permeable corrugated grid panel |
Jun. 21, 1983 |
| 4376044 |
Automatic sizing device |
Mar. 8, 1983 |
| 4348275 |
Apparatus for separating fine material from coarse material |
Sep. 7, 1982 |
| 4329230 |
Conveyor system |
May. 11, 1982 |
| 4289614 |
Sprouting beans refinement apparatus |
Sep. 15, 1981 |
| 4277339 |
Paint pigment skimmer |
Jul. 7, 1981 |
| 4234413 |
Method and apparatus for self-cleaning drilling mud separation system |
Nov. 18, 1980 |
| 4130478 |
Bowl shaped screening apparatus |
Dec. 19, 1978 |
| 3972813 |
Method of removing solid particles from a mixture comprising a viscous liquid, and separator for the carrying out of this method |
Aug. 3, 1976 |
| 3946996 |
Mixing and granulating apparatus |
Mar. 30, 1976 |
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