F04D 29/0516
Balancing pistons
Official title: {balancing pistons}
F04D29/0516 (Balancing pistons) appears on 87 US grants and 92 published applications in this corpus.
Search patents in F04D- Granted patents
- 87
- Published applications
- 92
- Assignees
- 63
- Inventors
- 233
- Latest grant
- 8 Jul 2025
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 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 4 | 2 |
| 2003 | 2 | 3 |
| 2004 | 3 | 3 |
| 2005 | 1 | 0 |
| 2006 | 2 | 0 |
| 2007 | 0 | 2 |
| 2008 | 1 | 1 |
| 2009 | 0 | 2 |
| 2010 | 0 | 4 |
| 2011 | 1 | 5 |
| 2012 | 3 | 5 |
| 2013 | 1 | 4 |
| 2014 | 3 | 3 |
| 2015 | 2 | 4 |
| 2016 | 4 | 13 |
| 2017 | 0 | 7 |
| 2018 | 8 | 4 |
| 2019 | 7 | 6 |
| 2020 | 6 | 3 |
| 2021 | 5 | 7 |
| 2022 | 4 | 2 |
| 2023 | 2 | 3 |
| 2024 | 3 | 3 |
| 2025 | 2 | 5 |
By publication year. Applications have been published since 2001.
Recent patents
- Rotary fluid machine8 Jul 2025US 12,352,280 B2Daikin Industries, Ltd.
- Pump comprising a balance arrangement and a related method11 Feb 2025US 12,221,972 B2
- Turbo compressor assembly of a cooling machine24 Dec 2024US 12,173,722 B2Mirai Intex Sagl
- Balancing and sealing piston, and associated cooling circuit and method26 Nov 2024US 12,152,604 B2Thermodyn
- Multistage pump and subsea pumping arrangement21 May 2024US 11,988,213 B2Sulzer Management AG
- Online rotor thrust adjustment system18 Dec 2025US 2025/0382895 A1Nuovo Pignone Tecnologie Srl
- Non-contact dynamic seal for sealing a radial gap4 Dec 2025US 2025/0369517 A1ebm-papst Mulfingen GmbH & Co. KG
- Pump apparatus23 Oct 2025US 2025/0327452 A1
- Turbocompressor31 Jul 2025US 2025/0243871 A1
- Pump Comprising a Balance Arrangement and a Related Method2 Jan 2025US 2025/0003416 A1Fmc Technologies Do Brasil Ltda
Most cited
By later US patents
- Thrust controlled rotary apparatus66US 4,170,435 A1979
- Rotary fluid handling machine having reduced fluid leakage62US 4,472,107 AUnion Carbide Corporation · 1984
- Thrust compensating apparatus57US 5,104,284 ADresser-Rand Company · 1992
- Method and device for reducing axial thrust in rotary machines and a centrifugal pump using same50US 6,129,507 ATechnology Commercialization Corp. · 2000
- Multistage centrifugal compressor without seals and with axial thrust balance49US 5,358,378 A1994