F01L 27/04
Delayed-action controls
Official title: Delayed-action controls, e.g. of cataract or dashpot type
F01L27/04 (Delayed-action controls) appears on 7 US grants and 0 published applications in this corpus.
Search patents in F01L- Granted patents
- 7
- Published applications
- 0
- Assignees
- 5
- Inventors
- 6
- Latest grant
- 17 Jun 1980
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Hydraulic oscillatory devices17 Jun 1980US 4,207,801 AA. F. Hydraulics Limited
- Control of hydraulically powered equipment4 Apr 1978US 4,082,032 ARaymond International Inc.
- Pressure fluid operated percussion tools19 Jul 1977US 4,036,108 ADobson Park Industries Limited
- Control of hydraulically powered equipment3 May 1977US 4,020,744 ARaymond International Inc.
- Hydroacoustic apparatus and valving mechanisms for use therein20 Jul 1976US 3,969,984 AHydroacoustics Inc.
No published applications in this class yet.
Most cited
By later US patents
- Hydraulically powered percussion drill12US 3,955,478 ADresser Industries, Inc. · 1976
- Control of hydraulically powered equipment6US 4,020,744 ARaymond International Inc. · 1977
- Hydraulic oscillatory devices6US 4,207,801 AA. F. Hydraulics Limited · 1980
- Hydroacoustic apparatus and valving mechanisms for use therein4US 3,969,984 AHydroacoustics Inc. · 1976
- Control of hydraulically powered equipment4US 4,082,032 ARaymond International Inc. · 1978