B29C 45/021
Plunger drives
Official title: {Plunger drives; Pressure equalizing means for a plurality of transfer plungers}
B29C45/021 (Plunger drives) appears on 37 US grants and 23 published applications in this corpus.
Search patents in B29C- Granted patents
- 37
- Published applications
- 23
- Assignees
- 27
- Inventors
- 67
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 1 | 1 |
| 2010 | 0 | 1 |
| 2011 | 2 | 1 |
| 2012 | 2 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 2 |
| 2020 | 1 | 0 |
| 2021 | 2 | 3 |
| 2022 | 0 | 2 |
| 2023 | 3 | 1 |
| 2024 | 3 | 2 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Resin molding device and method for producing resin molded article13 Jan 2026US 12,521,926 B2Towa Corporation
- Core molding apparatus and core molding method12 Aug 2025US 12,384,082 B2Toyota Jidosha Kabushiki Kaisha
- Rotor core manufacturing method, and rotor core molding system therefore31 Dec 2024US 12,184,135 B2Boschman Technologies B.V.
- Method for manufacturing resin molded product28 May 2024US 11,992,982 B2Towa Corporation
- Method for manufacturing resin molded product30 Apr 2024US 11,969,922 B2Towa Corporation
- Rotor core manufacturing method, and rotor core molding system therefore11 Jul 2024US 2024/0235347 A1Boschman Technologies B.V.
- Resin molding device and method for producing resin molded article11 Apr 2024US 2024/0116229 A1Towa Corporation
- Core molding apparatus and core molding method13 Apr 2023US 2023/0112343 A1Toyota Jidosha Kabushiki Kaisha
- Resin molding apparatus and method for manufacturing resin molded product26 May 2022US 2022/0161469 A1Towa Corporation
- Resin molding apparatus and method for manufacturing resin molded product26 May 2022US 2022/0161475 A1Towa Corporation
Most cited
By later US patents
- Single-strip molding apparatus23US 5,297,897 AASM Fico Tooling, b.v. · 1994
- Apparatus for enclosing semiconductors with resin by molding22US 4,511,317 A1985
- Press with a plurality of injection plungers21US 4,632,653 AMaschinenfabrik Lauffer GmbH & Co. KG. · 1986
- Molding apparatus for enclosing semiconductor chips with resin21US 4,723,899 A1988
- Device for encapsulating electronic components17US 5,158,780 ABoschman Technologies B.V. · 1992