D01H 4/18
Friction drums
Official title: Friction drums, e.g. arrangement of suction holes
D01H4/18 (Friction drums) appears on 19 US grants and 1 published applications in this corpus.
Search patents in D01H- Granted patents
- 19
- Published applications
- 1
- Assignees
- 7
- Inventors
- 19
- Latest grant
- 27 Apr 2004
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method of manufacturing a reinforcing thread27 Apr 2004US 6,725,641 B2Lainiere De Picardie Bc
- Suction roller for an open-end spinning machine14 Jul 1998US 5,778,653 A
- Arrangement for spinning staple fibers into a yarn23 Feb 1993US 5,187,930 A
- Mold for, and method of, fabricating a perforated body and perforated body for use as a friction spinning element5 Mar 1991US 4,997,528 AMaschinenfabrik Rieter AG
- Method for production of friction spinning means6 Nov 1990US 4,968,525 ARieter Machine Works, Ltd.
Most cited
By later US patents
- Open-end spinning apparatus24US 4,315,398 APlatt Saco Lowell Limited · 1982
- Frictional open-end spinning method and apparatus20US 4,281,507 AVyzkumny ustav bavlnarsky · 1981
- Friction spinning roller arrangement10US 4,571,932 A1986
- Apparatus for making a yarn8US 4,502,272 ATextilmaschinenfabrik Dr. Ernst Fehrer Aktiengesellschaft · 1985
- Rollers for friction spinning apparatus6US 4,522,022 AHollingsworth (U.K.) Limited · 1985