F04B 11/0033
With a mechanical spring
Official title: {with a mechanical spring}
F04B11/0033 (With a mechanical spring) appears on 112 US grants and 92 published applications in this corpus.
Search patents in F04B- Granted patents
- 112
- Published applications
- 92
- Assignees
- 67
- Inventors
- 193
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 2 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 2 | 5 |
| 2013 | 2 | 5 |
| 2014 | 3 | 6 |
| 2015 | 5 | 5 |
| 2016 | 4 | 12 |
| 2017 | 8 | 7 |
| 2018 | 7 | 7 |
| 2019 | 7 | 9 |
| 2020 | 9 | 7 |
| 2021 | 5 | 4 |
| 2022 | 4 | 5 |
| 2023 | 3 | 3 |
| 2024 | 4 | 3 |
| 2025 | 2 | 5 |
| 2026 | 5 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fluidic methods and devices6 Oct 2026US 12,753,749 B2Obotics Inc.
- Accumulator for prevention of hydraulic pump cavitation21 Jul 2026US 12,687,156 B2The Boeing Company
- Method for controlling the delivery pressure of a supply pump9 Jun 2026US 12,650,122 B2Henkel AG & Co. KGaA
- Hydraulic pressure control unit19 May 2026US 12,630,131 B2Robert Bosch GmbH
- Pulsation dampener for single use applications19 May 2026US 12,631,167 B2Equilibar, LLC
- Pulsation dampener for single use applications18 Jun 2026US 2026/0168482 A1Equilibar, LLC
- Accumulator for Prevention of Hydraulic Pump Cavitation19 Feb 2026US 2026/0049604 A1The Boeing Company
- Liquid feeding assistance device, cell processing apparatus, and liquid feeding assistance method20 Nov 2025US 2025/0354102 A1FUJIFILM Corporation
- Liquid feeding assistance device, cell processing apparatus, and liquid feeding assistance method20 Nov 2025US 2025/0354103 A1FUJIFILM Corporation
- Dampening element for fluid management system3 Jul 2025US 2025/0213774 A1Boston Scientific Scimed, Inc.
Most cited
By later US patents
- Proportioning pump72US 5,158,441 ABaxter International Inc. · 1992
- Pulseless liquid supply system for flow cytometry60US 5,915,925 A1999
- Method of controlling the drive means for a pump delivering liquid to an accumlator58US 6,017,194 A2000
- Reverse osmosis apparatus and method incorporating external fluid exchange43US 4,432,876 ASeagold Industries Corporation · 1984
- Mechanism for restraining fuel pressure pulsation and high pressure fuel supply pump of internal combustion engine with such mechanism42US 8,393,881 B2Hitachi, Ltd. · 2013