F01L 31/02
Valve drive, valve adjustment during operation, or other valve control, not provided
Official title: with tripping-gear (for oscillatory valves F01L31/06); Tripping of valves
F01L31/02 (Valve drive, valve adjustment during operation, or other valve control, not provided) appears on 18 US grants and 2 published applications in this corpus.
Search patents in F01L- Granted patents
- 18
- Published applications
- 2
- Assignees
- 9
- Inventors
- 24
- Latest grant
- 6 Dec 2005
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 2 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Asymmetrically accelerated vibrator for feeding materials6 Dec 2005US 6,971,301 B2Vibro Industries, Inc.
- Valving system for a downhole hydraulically actuated pump27 Sep 2005US 6,948,917 B1
- Fluid driven reciprocating pump2 Jun 1998US 5,758,563 AHolcom Co.
- Pressure booster21 Mar 1995US 5,399,071 A
- Reduced icing low friction air valve15 Nov 1994US 5,363,739 AGraco Inc.
Most cited
By later US patents
- Fluid driven reciprocating pump45US 5,758,563 AHolcom Co. · 1998
- Continuously operating piston pump39US 3,999,896 A1976
- Air valve actuator for reciprocable machine38US 5,240,390 AGraco Inc. · 1993
- Switching device for reciprocating pumps8US 5,002,468 AYamada Yuki Seizo Co., Ltd. · 1991
- Pilot valve7US 4,789,131 AGraco Inc. · 1988