D01H 4/20
Drum bearings
Official title: Drum bearings; Arrangements for driving or stopping (control therefor D01H4/42)
D01H4/20 (Drum bearings) appears on 8 US grants and 0 published applications in this corpus.
Search patents in D01H- Granted patents
- 8
- Published applications
- 0
- Assignees
- 5
- Inventors
- 9
- Latest grant
- 20 Oct 1987
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Open-end spinning device20 Oct 1987US 4,700,539 ASchubert & Salzer
- Arrangement for open-end friction spinning16 Jun 1987US 4,672,803 A
- Step bearing for a spinning rotor shaft21 Oct 1986US 4,618,273 A
- Friction spinning frame19 Aug 1986US 4,606,185 AKabushiki Kaisha Toyoda Jidoshokki Seisakusho
- Open-end friction spinning machine having a plurality of spinning units25 Feb 1986US 4,571,933 AHans and Fritz Stahlecker
No published applications in this class yet.
Most cited
By later US patents
- Step bearing for a spinning rotor shaft12US 4,618,273 A1986
- Apparatus for making a yarn8US 4,502,272 ATextilmaschinenfabrik Dr. Ernst Fehrer Aktiengesellschaft · 1985
- Open-end friction spinning machine having a plurality of spinning units3US 4,571,933 AHans and Fritz Stahlecker · 1986
- Friction roller arrangement for open end friction spinning machine2US 4,514,975 A1985
- Device for driving a friction spinning unit2US 4,541,232 AW. Schlafhorst AG & Co. · 1985