F04B 39/042
Sealing being provided on the piston
Official title: {sealing being provided on the piston}
F04B39/042 (Sealing being provided on the piston) appears on 60 US grants and 45 published applications in this corpus.
Search patents in F04B- Granted patents
- 60
- Published applications
- 45
- Assignees
- 53
- Inventors
- 135
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 0 | 2 |
| 2014 | 0 | 1 |
| 2015 | 1 | 4 |
| 2016 | 3 | 0 |
| 2017 | 2 | 2 |
| 2018 | 2 | 1 |
| 2019 | 0 | 3 |
| 2020 | 3 | 3 |
| 2021 | 1 | 5 |
| 2022 | 3 | 5 |
| 2023 | 3 | 3 |
| 2024 | 1 | 5 |
| 2025 | 8 | 4 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Piston for a compressor, compressor, and method and removal tool for disassembling a piston2 Jun 2026US 12,644,447 B2Burckhardt Compression AG
- Long-life non-contact pump12 May 2026US 12,624,690 B2
- Piston ring17 Mar 2026US 12,578,017 B2Ntn Corporation
- Stuffing box for use with reciprocal moveable piston rods and method of manufacturing30 Dec 2025US 12,510,158 B2Nuovo Pignone Tecnologie Srl
- Positive displacement machine, compressor, cooling device, and electronic apparatus21 Oct 2025US 12,449,168 B2Seiko Epson Corporation
- Piston intended for a fluid machine and provided with a system for pressing seals, fluid machine comprising such a piston2 Apr 2026US 2026/0092603 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Sealing resin composition and seal20 Nov 2025US 2025/0354043 A1Ntn Corporation
- Long-life non-contact pump11 Sep 2025US 2025/0283458 A1
- Piston rod mechanism for air compressor and air compressor5 Jun 2025US 2025/0180002 A1Dongguan Active Tools Co., Ltd.
- Piston for a compressor, compressor, and method and removal tool for disassembling a piston22 May 2025US 2025/0163901 A1Burckhardt Compression AG
Most cited
By later US patents
- Reciprocatory piston and cylinder machines40US 4,102,608 ACommonwealth Scientific and Industrial Research Organization · 1978
- Piston cup and cylinder assembly32US 4,730,550 AThomas Industries, Inc. · 1988
- Sealing arrangement for piston in compressor22US 5,050,892 AKabushiki Kaisha Toyoda Jidoshokki Seisakusho · 1991
- Pump22US 9,677,548 B2Leuco S.P.A. · 2017
- Refrigeration system and reciprocating compressor therefor with pressure stabilizing seal20US 4,244,192 AHelix Technology Corporation · 1981