F16K 31/36

In which fluid from the circuit is constantly supplied to the fluid

Official title: in which fluid from the circuit is constantly supplied to the fluid motor

F16K31/36 (In which fluid from the circuit is constantly supplied to the fluid) appears on 1,411 US grants and 1,096 published applications in this corpus.

Search patents in F16K

Granted patents: 1,411
Published applications: 1,096
Assignees: 712
Inventors: 2,315
Latest grant: 1 Sep 2026

Filings by year

F16K 31/36: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	33	0
1977	9	0
1978	20	0
1979	20	0
1980	19	0
1981	27	0
1982	11	0
1983	15	0
1984	13	0
1985	20	0
1986	20	0
1987	17	0
1988	15	0
1989	23	0
1990	21	0
1991	18	0
1992	20	0
1993	14	0
1994	16	0
1995	12	0
1996	21	0
1997	12	0
1998	19	0
1999	31	0
2000	25	0
2001	36	8
2002	26	18
2003	22	39
2004	28	44
2005	38	35
2006	33	30
2007	18	32
2008	12	31
2009	21	37
2010	17	38
2011	19	37
2012	35	40
2013	33	49
2014	27	40
2015	41	37
2016	36	46
2017	38	43
2018	33	67
2019	51	64
2020	70	63
2021	64	47
2022	43	68
2023	58	51
2024	58	61
2025	55	45
2026	28	26

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

In which fluid from the circuit is constantly supplied to the fluid

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