F01C 21/10
Outer members for co-operation with rotary pistons
Official title: Outer members for co-operation with rotary pistons; Casings (casings for rotary engines or machines in general F16M)
F01C21/10 (Outer members for co-operation with rotary pistons) appears on 1,220 US grants and 1,153 published applications in this corpus.
Search patents in F01C- Granted patents
- 1,220
- Published applications
- 1,153
- Assignees
- 525
- Inventors
- 2,610
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 11 | 0 |
| 1978 | 13 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 8 | 0 |
| 1984 | 16 | 0 |
| 1985 | 13 | 0 |
| 1986 | 9 | 0 |
| 1987 | 12 | 0 |
| 1988 | 17 | 0 |
| 1989 | 13 | 0 |
| 1990 | 5 | 0 |
| 1991 | 9 | 0 |
| 1992 | 10 | 0 |
| 1993 | 13 | 0 |
| 1994 | 17 | 0 |
| 1995 | 16 | 0 |
| 1996 | 20 | 0 |
| 1997 | 11 | 0 |
| 1998 | 11 | 0 |
| 1999 | 18 | 0 |
| 2000 | 30 | 0 |
| 2001 | 33 | 10 |
| 2002 | 26 | 26 |
| 2003 | 27 | 24 |
| 2004 | 11 | 42 |
| 2005 | 20 | 35 |
| 2006 | 22 | 44 |
| 2007 | 20 | 20 |
| 2008 | 21 | 26 |
| 2009 | 18 | 16 |
| 2010 | 15 | 32 |
| 2011 | 22 | 29 |
| 2012 | 13 | 41 |
| 2013 | 23 | 67 |
| 2014 | 34 | 62 |
| 2015 | 43 | 90 |
| 2016 | 48 | 70 |
| 2017 | 68 | 88 |
| 2018 | 72 | 66 |
| 2019 | 62 | 56 |
| 2020 | 54 | 64 |
| 2021 | 47 | 52 |
| 2022 | 63 | 58 |
| 2023 | 48 | 38 |
| 2024 | 60 | 49 |
| 2025 | 40 | 32 |
| 2026 | 16 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Vertical type compressor and laundry treating apparatus having the same22 Sep 2026US 12,742,456 B2LG Electronics Inc.
- Fretting resistant rotary engine housings18 Aug 2026US 12,709,983 B2Pratt & Whitney Canada Corp.
- Method for producing a housing, and shell housing and housing for a rotary piston engine26 May 2026US 12,637,946 B2Knapp e-mobility GmbH
- Hydraulic pump and module formed from such a hydraulic pump and a receptacle12 May 2026US 12,624,706 B2Valeo Powertrain GmbH
- Rotary machine5 May 2026US 12,618,328 B2Lumenium LLC
- Rotational Engine With Inner and Outer Rings17 Sep 2026US 2026/0275867 A1Duplicent, LLC
- Rotary machine17 Sep 2026US 2026/0275868 A1Lumenium LLC
- Pump stator tie-layer with surface roughness20 Aug 2026US 2026/0243253 A1Schlumberger Technology Corporation
- Vacuum pump20 Aug 2026US 2026/0243257 A1Pfeiffer Vacuum GmbH
- Stator with non-uniform thickness for one-to-two lobe ratio pumps6 Aug 2026US 2026/0226894 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Portable ventilator system278US 7,188,621 B2Pulmonetic Systems, Inc. · 2007
- Compressor pulse width modulation172US 6,213,731 B1Copeland Corporation · 2001
- Capacity modulated scroll machine162US 5,613,841 ACopeland Corporation · 1997
- Mounting body127US 6,216,691 B1ResMed Limited · 2001
- Capacity modulated scroll machine119US 5,611,674 ACopeland Corporation · 1997