F04C 29/124
With inlet and outlet valves specially adapted for rotary or oscillating piston
Official title: {with inlet and outlet valves specially adapted for rotary or oscillating piston pumps}
F04C29/124 (With inlet and outlet valves specially adapted for rotary or oscillating piston) appears on 497 US grants and 449 published applications in this corpus.
Search patents in F04C- Granted patents
- 497
- Published applications
- 449
- Assignees
- 190
- Inventors
- 1,069
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 6 | 0 |
| 1989 | 5 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 6 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 7 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 6 | 0 |
| 2000 | 13 | 0 |
| 2001 | 14 | 1 |
| 2002 | 6 | 11 |
| 2003 | 9 | 9 |
| 2004 | 10 | 8 |
| 2005 | 4 | 12 |
| 2006 | 7 | 10 |
| 2007 | 6 | 9 |
| 2008 | 6 | 8 |
| 2009 | 4 | 14 |
| 2010 | 6 | 15 |
| 2011 | 9 | 8 |
| 2012 | 13 | 8 |
| 2013 | 7 | 21 |
| 2014 | 10 | 20 |
| 2015 | 21 | 28 |
| 2016 | 14 | 21 |
| 2017 | 17 | 26 |
| 2018 | 23 | 28 |
| 2019 | 20 | 21 |
| 2020 | 25 | 34 |
| 2021 | 26 | 20 |
| 2022 | 32 | 22 |
| 2023 | 30 | 30 |
| 2024 | 42 | 23 |
| 2025 | 24 | 18 |
| 2026 | 12 | 24 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Antirotation reed valve systems and methods for compressors15 Sep 2026US 12,736,053 B2Copeland Corporation
- Compressor8 Sep 2026US 12,729,689 B2Hitachi-Johnson Controls Air Conditioning, Inc.
- Electric compressor with integrated vapor injection circuit28 Jul 2026US 12,692,865 B1Mahle International GmbH
- Reed retainer mechanism and electric compressor with reed retainer mechanism30 Jun 2026US 12,669,122 B2Mahle International GmbH
- Compressor having shutdown valve assembly30 Jun 2026US 12,669,126 B2Copeland Corporation
- Scroll compressor with a sealing ring for a fixed disk check valve8 Oct 2026US 2026/0309151 A1Hitachi-Johnson Controls Air Conditioning, Inc.
- Reducing power consumption in vacuum pumps1 Oct 2026US 2026/0298240 A1Edwards Limited
- Scroll compressor13 Aug 2026US 2026/0235122 A1Hanon Systems
- Discharge Passages For Compressors and Compressors Including Same13 Aug 2026US 2026/0235126 A1
- Electric compressor with integrated vapor injection circuit30 Jul 2026US 2026/0218703 A1Mahle International GmbH
Most cited
By later US patents
- Compressor having functions of discharge interruption and discharge control of pressurized gas126US 4,410,299 AOgura Glutch Co., Ltd. · 1983
- Scroll compressor having bypass valves113US 5,855,475 AMatsushita Electric Industrial Co., Ltd. · 1999
- Suction baffle for refrigeration compressor84US 5,055,010 ACopeland Corporation · 1991
- Scroll-type refrigerant compressor80US 5,674,058 ANippon Soken, Inc. · 1997
- Temperature sensitive solenoid valve in a scroll compressor72US 4,820,130 AAmerican Standard Inc. · 1989