F01L 27/00
Distribution or expansion valve-gear peculiar to free-piston machines or engines and not
Official title: Distribution or expansion valve-gear peculiar to free-piston machines or engines and not provided for in F01L21/00 - F01L25/00
F01L27/00 (Distribution or expansion valve-gear peculiar to free-piston machines or engines and not) appears on 9 US grants and 0 published applications in this corpus.
Search patents in F01L- Granted patents
- 9
- Published applications
- 0
- Assignees
- 7
- Inventors
- 8
- Latest grant
- 23 Dec 1986
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Control valve for pile driver and method23 Dec 1986US 4,630,524 AConmaco, Inc.
- Reciprocating fluid-operated actuator with deceleration control18 Jun 1985US 4,523,511 ADixon Automatic Tool, Inc.
- 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
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