F04C 27/008
Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids: for other
Official title: {for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine}
F04C27/008 (Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids: for other) appears on 332 US grants and 344 published applications in this corpus.
Search patents in F04C- Granted patents
- 332
- Published applications
- 344
- Assignees
- 168
- Inventors
- 853
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 7 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 6 | 0 |
| 2001 | 9 | 1 |
| 2002 | 6 | 16 |
| 2003 | 14 | 5 |
| 2004 | 3 | 6 |
| 2005 | 2 | 3 |
| 2006 | 3 | 9 |
| 2007 | 1 | 7 |
| 2008 | 3 | 11 |
| 2009 | 7 | 7 |
| 2010 | 5 | 7 |
| 2011 | 6 | 10 |
| 2012 | 2 | 14 |
| 2013 | 10 | 13 |
| 2014 | 9 | 9 |
| 2015 | 12 | 17 |
| 2016 | 10 | 14 |
| 2017 | 14 | 17 |
| 2018 | 12 | 22 |
| 2019 | 17 | 26 |
| 2020 | 19 | 23 |
| 2021 | 16 | 25 |
| 2022 | 18 | 13 |
| 2023 | 22 | 27 |
| 2024 | 30 | 15 |
| 2025 | 23 | 16 |
| 2026 | 5 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Supercharger22 Sep 2026US 12,742,412 B2Eaton Intelligent Power Limited
- Compressor sealing element arrangement near stator for controlling a gaseous fluid flow therethrough8 Sep 2026US 12,729,686 B2Hanon Systems
- Connecting ring of a root vacuum pump5 May 2026US 12,618,407 B1Ching Link Consultant Company, Ltd
- Scroll compressor31 Mar 2026US 12,590,583 B2Sanden Corporation
- Refrigerant compressor with a motor rotor and stator separated by a separating can13 Jan 2026US 12,523,225 B2OET GmbH
- Scroll fluid machine with elastic member27 Aug 2026US 2026/0251140 A1Anest Iwata Corporation
- Roots-type compressor system27 Aug 2026US 2026/0251145 A1
- Compressor including end cap having internal features and methods of assembling the same13 Aug 2026US 2026/0235124 A1
- Air Compressor30 Jul 2026US 2026/0218705 A1Hitachi Industrial Equipment Systems Co., Ltd.
- Hermetic compressor and refrigeration cycle apparatus16 Jul 2026US 2026/0201886 A1Mitsubishi Electric Corporation
Most cited
By later US patents
- Face seal assembly118US 6,325,380 B1Feodor Burgmann Dichtungswerke GmbH & Co. · 2001
- Shaft seals for a screw compressor62US 3,975,123 ASvenska Rotor Maskiner Aktiebolag · 1976
- Scroll compressors57US 6,506,036 B2Kabushiki Kaisha Toyota Jidoshokki · 2003
- Scroll compressors54US 6,464,481 B2Kabushiki Kaisha Toyota Jidoshokki · 2002
- Compressor seal assembly46US 8,932,036 B2Emerson Climate Technologies, Inc. · 2015