F04C 2240/807
Balance weight, counterweight
F04C2240/807 (Balance weight, counterweight) appears on 183 US grants and 164 published applications in this corpus.
Search patents in F04C- Granted patents
- 183
- Published applications
- 164
- Assignees
- 68
- Inventors
- 472
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 4 | 0 |
| 1995 | 6 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 1 |
| 2002 | 1 | 0 |
| 2003 | 1 | 2 |
| 2004 | 1 | 2 |
| 2005 | 1 | 1 |
| 2006 | 1 | 2 |
| 2007 | 1 | 1 |
| 2008 | 3 | 2 |
| 2009 | 0 | 2 |
| 2010 | 0 | 3 |
| 2011 | 2 | 1 |
| 2012 | 2 | 5 |
| 2013 | 0 | 4 |
| 2014 | 2 | 7 |
| 2015 | 5 | 19 |
| 2016 | 7 | 4 |
| 2017 | 10 | 12 |
| 2018 | 8 | 10 |
| 2019 | 8 | 14 |
| 2020 | 10 | 18 |
| 2021 | 18 | 8 |
| 2022 | 13 | 8 |
| 2023 | 11 | 9 |
| 2024 | 13 | 7 |
| 2025 | 12 | 14 |
| 2026 | 7 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Scroll compressors including ring-shaped counterweight assemblies1 Sep 2026US 12,723,587 B2Copeland Corporation
- Compressor unit and refrigeration apparatus1 Sep 2026US 12,723,786 B2Daikin Industries, Ltd.
- Scroll compressor19 May 2026US 12,631,181 B2Kabushiki Kaisha Toyota Jidoshokki
- Rotor endplate for permanent magnet motor, rotor assembly with endplates, motor with rotor endplates, and electric compressor with motor having endplates31 Mar 2026US 12,592,611 B1Mahle International GmbH
- Electric compressor3 Feb 2026US 12,540,621 B2Hanon Systems
- Motorized device comprising a member with eccentric movement1 Oct 2026US 2026/0298242 A1Sonceboz Motion Boncourt SA
- Electric compressor2 Jul 2026US 2026/0185525 A1
- Scroll compressor11 Jun 2026US 2026/0160250 A1Kabushiki Kaisha Toyota Jidoshokki
- Compressor and refrigeration apparatus30 Apr 2026US 2026/0117773 A1Daikin Industries, Ltd.
- Scroll plate cover and scroll compressor23 Apr 2026US 2026/0110298 A1
Most cited
By later US patents
- Scroll apparatus with pressurizable fluid chamber for axial scroll bias70US 3,994,633 AArthur D. Little, Inc. · 1976
- Seal structure in a scroll type compressor61US 6,454,551 B2Kabushiki Kaisha Toyoda Jidoshokki Seisakusho · 2002
- Scroll type fluid apparatus having two orbiting end plates linked together54US 4,990,071 ASanden Corporation · 1991
- Scroll compressor having changeable axis in eccentric drive51US 5,040,958 AHitachi, Ltd. · 1991
- Scroll compressor oil circulation system50US 5,370,513 ACopeland Corporation · 1994