F15B 15/223

Having a piston with a piston extension or piston recess which completely

Official title: {having a piston with a piston extension or piston recess which completely seals the main fluid outlet as the piston approaches its end position}

F15B15/223 (Having a piston with a piston extension or piston recess which completely) appears on 84 US grants and 46 published applications in this corpus.

Search patents in F15B

Granted patents: 84
Published applications: 46
Assignees: 58
Inventors: 149
Latest grant: 25 Aug 2026

Filings by year

F15B 15/223: granted patents and published applications per publication year
Year	Granted patents	Published applications
1976	2	0
1977	1	0
1978	2	0
1979	2	0
1980	2	0
1981	0	0
1982	0	0
1983	0	0
1984	2	0
1985	0	0
1986	0	0
1987	2	0
1988	1	0
1989	2	0
1990	0	0
1991	0	0
1992	1	0
1993	2	0
1994	1	0
1995	1	0
1996	1	0
1997	1	0
1998	0	0
1999	6	0
2000	2	0
2001	4	1
2002	3	4
2003	3	4
2004	4	1
2005	0	1
2006	2	1
2007	0	1
2008	1	2
2009	1	0
2010	0	0
2011	1	2
2012	2	4
2013	1	1
2014	2	2
2015	3	1
2016	0	1
2017	1	1
2018	2	1
2019	1	1
2020	4	6
2021	5	1
2022	5	3
2023	1	4
2024	2	1
2025	4	0
2026	1	2

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

Recent patents

Most cited

By later US patents