F04B 39/1026
Without spring
Official title: {without spring (F04B39/1033 takes precedence)}
F04B39/1026 (Without spring) appears on 19 US grants and 22 published applications in this corpus.
Search patents in F04B- Granted patents
- 19
- Published applications
- 22
- Assignees
- 21
- Inventors
- 39
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 2 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 2 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 1 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 1 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 2 | 2 |
| 2020 | 1 | 0 |
| 2021 | 2 | 2 |
| 2022 | 0 | 0 |
| 2023 | 1 | 2 |
| 2024 | 1 | 0 |
| 2025 | 2 | 4 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Air compressor structure8 Sep 2026US 12,729,671 B2Unik World Industrial Co., Ltd.
- Head module for air compressor and air compressor including same2 Jun 2026US 12,644,446 B2MDX Co., Ltd.
- Compressor assembly including a flow-restricting valve11 Nov 2025US 12,467,462 B2Carrier Corporation
- Valve15 Apr 2025US 12,276,345 B2Lee Ventus Ltd.
- Reciprocating-type compressor for refrigeration and/or conditioning and/or heat pump system17 Sep 2024US 12,092,373 B2Officine Mario Dorin S.P.A.
- Breast Pump Driving Apparatus7 May 2026US 2026/0124347 A1Guangdong Golden Baby Health Supplies Co., Ltd.
- Piston pump with quick exhaust slide valves2 Apr 2026US 2026/0092600 A1Samoa Industrial S.A.
- Head module for air compressor and air compressor including same18 Dec 2025US 2025/0382953 A1MDX Co., Ltd.
- Valve for controlling fluid flow therethrough23 Oct 2025US 2025/0327529 A1
- Air compressor structure24 Jul 2025US 2025/0237207 A1Unik World Industrial Co., Ltd.
Most cited
By later US patents
- Springless compressor valve11US 7,533,692 B2Cameron International Corporation · 2009
- Discharge valve of a hermetic compressor using stopper and weight driven disc valve8US 6,712,591 B2Samsung Gwangju Electronics Co., Ltd. · 2004
- Springless compressor valve6US 7,819,131 B2Cameron International Corporation · 2010
- Valve structure6US 8,128,385 B2Aisin Seiki Kabushiki Kaisha · 2012
- Valve mount for a compressor pressure valve3US 4,249,564 AWABCO Westinghouse GmbH · 1981