F04B 1/047
With actuating or actuated elements at the outer ends of the cylinders
Official title: with actuating or actuated elements at the outer ends of the cylinders
F04B1/047 (With actuating or actuated elements at the outer ends of the cylinders) appears on 87 US grants and 98 published applications in this corpus.
Search patents in F04B- Granted patents
- 87
- Published applications
- 98
- Assignees
- 57
- Inventors
- 185
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 2 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 2 |
| 2012 | 0 | 2 |
| 2013 | 1 | 1 |
| 2014 | 1 | 7 |
| 2015 | 2 | 4 |
| 2016 | 4 | 7 |
| 2017 | 3 | 6 |
| 2018 | 3 | 6 |
| 2019 | 8 | 4 |
| 2020 | 4 | 4 |
| 2021 | 5 | 2 |
| 2022 | 2 | 7 |
| 2023 | 5 | 9 |
| 2024 | 5 | 15 |
| 2025 | 13 | 11 |
| 2026 | 7 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fluid end with clamped retention25 Aug 2026US 12,716,495 B2Kerr Machine Co.
- Positive displacement pump2 Jun 2026US 12,644,440 B2Binks US, LLC
- Hydrostatic radial piston unit26 May 2026US 12,638,057 B2Danfoss A/S
- Wind turbine generator with hydraulic pump21 Apr 2026US 12,607,166 B2Delft Offshore Turbine B.V.
- Radial piston pumps3 Mar 2026US 12,565,878 B2Domin Fluid Power Limited
- Improved assembly structure for a steering yoke of a hydraulic machine11 Jun 2026US 2026/0159156 A1Poclain Hydraulics Industrie
- Improved support structure for a steering member4 Jun 2026US 2026/0152226 A1Poclain Hydraulics Industrie
- Modular power end12 Feb 2026US 2026/0043397 A1Kerr Machine Co.
- Hydraulic machine comprising a dog brake18 Dec 2025US 2025/0382939 A1
- Hydraulic machine provided with a direction changing drawer23 Oct 2025US 2025/0327437 A1
Most cited
By later US patents
- Mechanically operated dispensing device for increasing discharge pressure and dispensing time41US 4,167,941 AJames D. Pauls, Ltd. (Limited Partnership) · 1979
- Hydraulic pump with integral electric motor40US 5,190,447 AThe United States of America as represented by the Secretary of the Navy · 1993
- Fluid pump21US 6,224,346 B1Medimop Medical Projects Ltd. · 2001
- Mechanically operated mixing dispenser having a plurality of expansible chambers and a plurality of accumulating chambers20US 4,176,764 AJames D. Pauls, Ltd. · 1979
- Zero leakage valveless positive fluid displacement device20US 6,162,030 AEncyNova International, Inc. · 2000