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F04D 29/0416

Balancing pistons

Official title: {balancing pistons}

F04D29/0416 (Balancing pistons) appears on 111 US grants and 95 published applications in this corpus.

Search patents in F04D

Granted patents: 111
Published applications: 95
Assignees: 79
Inventors: 244
Latest grant: 18 Aug 2026

Filings by year

F04D 29/0416: granted patents and published applications per publication year
Year	Granted patents	Published applications
1978	1	0
1979	1	0
1980	0	0
1981	0	0
1982	0	0
1983	0	0
1984	1	0
1985	2	0
1986	0	0
1987	2	0
1988	2	0
1989	1	0
1990	1	0
1991	2	0
1992	0	0
1993	3	0
1994	1	0
1995	1	0
1996	2	0
1997	4	0
1998	2	0
1999	1	0
2000	4	0
2001	4	0
2002	0	1
2003	2	0
2004	0	0
2005	0	4
2006	1	1
2007	1	2
2008	0	5
2009	1	2
2010	4	2
2011	2	2
2012	3	3
2013	1	2
2014	1	0
2015	1	2
2016	2	6
2017	2	14
2018	6	5
2019	8	6
2020	9	6
2021	1	7
2022	8	6
2023	8	3
2024	6	6
2025	6	6
2026	3	4

By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.

Recent patents

Centrifugal pump18 Aug 2026US 12,710,048 B2Sulzer Management AG
Balance drums and systems for managing axial forces for pumps and related systems and methods24 Mar 2026US 12,584,488 B2Flowserve US Company
Multi-stage centrifugal pump comprising an assembly for compensating axial forces6 Jan 2026US 12,516,674 B1Sulzer Management AG
Electric pump2 Dec 2025US 12,486,847 B2Shinano Kenshi Co., Ltd.
Pump shaft for a multi-stage pump25 Feb 2025US 12,234,831 B2KSB SE & Co. KGaA

Most cited

By later US patents