F04B 9/135
Reciprocating movement of the pumping members being obtained by two single-acting elastic-fluid
Official title: reciprocating movement of the pumping members being obtained by two single-acting elastic-fluid motors, each acting in one direction
F04B9/135 (Reciprocating movement of the pumping members being obtained by two single-acting elastic-fluid) appears on 57 US grants and 26 published applications in this corpus.
Search patents in F04B- Granted patents
- 57
- Published applications
- 26
- Assignees
- 28
- Inventors
- 71
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 0 |
| 2003 | 1 | 2 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 2 |
| 2012 | 0 | 1 |
| 2013 | 1 | 2 |
| 2014 | 1 | 3 |
| 2015 | 1 | 2 |
| 2016 | 3 | 2 |
| 2017 | 2 | 1 |
| 2018 | 5 | 2 |
| 2019 | 0 | 1 |
| 2020 | 0 | 1 |
| 2021 | 2 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Single piston foundation bag-in-box (BIB) pump28 Feb 2023US 11,592,013 B2Flow Control LLC
- Reciprocating piston motor, motor-pump assembly and method for driving a pump2 Nov 2021US 11,162,516 B2
- Volumetric pump16 Feb 2021US 10,920,770 B2Goodrich Actuation Systems Limited
- Apparatus employing pressure transients for transporting fluids16 Oct 2018US 10,100,823 B2Impact Technology Systems AS
- Pressure multiplier18 Jul 2024US 2024/0240652 A1Camozzi Automation S.P.A.
- Single piston foundation bag-in-box (bib) pump28 Apr 2022US 2022/0128048 A1Flow Control LLC
- Reciprocating piston motor, motor-pump assembly and method for driving a pump16 Jan 2020US 2020/0018330 A1
- Volumetric pump10 Jan 2019US 2019/0010934 A1Goodrich Actuation Systems Limited
- Diaphragm Pump with Automatic Priming Function13 Dec 2018US 2018/0355860 A1Ingersoll-Rand Company
Most cited
By later US patents
- Fluid driven recipricating apparatus66US 5,616,005 AThe Regents of the University of California · 1997
- Pump apparatus60US 4,008,984 A1977
- Double-acting, fluid-operated pump having pilot valve control of distributor motor55US 4,123,204 AScholle Corporation · 1978
- Double-acting pump54US 6,299,415 B12001
- Pneumatically shifted reciprocating pump50US 5,558,506 A1996