F04B 27/053
With an actuating element at the inner ends of the cylinders
Official title: with an actuating element at the inner ends of the cylinders
F04B27/053 (With an actuating element at the inner ends of the cylinders) appears on 93 US grants and 111 published applications in this corpus.
Search patents in F04B- Granted patents
- 93
- Published applications
- 111
- Assignees
- 79
- Inventors
- 244
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 2 |
| 2006 | 0 | 1 |
| 2007 | 1 | 2 |
| 2008 | 2 | 4 |
| 2009 | 1 | 3 |
| 2010 | 1 | 3 |
| 2011 | 2 | 1 |
| 2012 | 1 | 2 |
| 2013 | 4 | 5 |
| 2014 | 1 | 3 |
| 2015 | 3 | 1 |
| 2016 | 1 | 4 |
| 2017 | 2 | 5 |
| 2018 | 1 | 10 |
| 2019 | 4 | 6 |
| 2020 | 9 | 6 |
| 2021 | 11 | 12 |
| 2022 | 5 | 9 |
| 2023 | 9 | 13 |
| 2024 | 4 | 6 |
| 2025 | 6 | 6 |
| 2026 | 7 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Reciprocating piston pump18 Aug 2026US 12,710,033 B1Oshkosh Corporation
- Radial piston compressor with transmission element and piston guide ring28 Jul 2026US 12,692,849 B2thyssenkrupp AG
- Head module for air compressor and air compressor including same2 Jun 2026US 12,644,446 B2MDX Co., Ltd.
- Pump assembly5 May 2026US 12,618,402 B2Leggett & Platt Canada Co.
- Positive displacement machine, compressor, cooling apparatus, and electronic equipment20 Jan 2026US 12,529,362 B2Seiko Epson Corporation
- Piston-cylinder assembly for a radial piston compressor, and radial piston compressor24 Sep 2026US 2026/0286945 A1thyssenkrupp AG
- Radial piston compressor10 Sep 2026US 2026/0266276 A1thyssenkrupp AG
- Radial piston compressor23 Jul 2026US 2026/0210344 A1thyssenkrupp AG
- Modular Pump and Pump Modules for Modular Pumps16 Jul 2026US 2026/0201874 A1Oxus America, Inc.
- Oil-free air compressor and vehicle2 Jul 2026US 2026/0185513 A1Zhejiang Ruili Air Copressor Equipment Co., Ltd.
Most cited
By later US patents
- Reciprocating compressor and oxygen concentrator26US 8,435,013 B2Daikin Industries, Ltd. · 2013
- Radial-pluger-type apparatus with variable plunger stroke25US 5,280,745 AHonda Giken Kogyo Kabushiki Kaisha · 1994
- Variable capacity radial-4 compressor20US 4,065,229 AGeneral Motors Corporation · 1977
- Cam driven compressor20US 4,105,371 AGeneral Motors Corporation · 1978
- Reciprocating compressor19US 5,030,065 ASulzer Brothers Limited · 1991