B29C 57/02
Belling or enlarging
Official title: Belling or enlarging, e.g. combined with forming a groove
B29C57/02 (Belling or enlarging) appears on 322 US grants and 229 published applications in this corpus.
Search patents in B29C- Granted patents
- 322
- Published applications
- 229
- Assignees
- 175
- Inventors
- 494
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 16 | 0 |
| 1978 | 14 | 0 |
| 1979 | 9 | 0 |
| 1980 | 10 | 0 |
| 1981 | 8 | 0 |
| 1982 | 8 | 0 |
| 1983 | 15 | 0 |
| 1984 | 6 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 6 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 6 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 5 | 0 |
| 2001 | 4 | 2 |
| 2002 | 5 | 3 |
| 2003 | 6 | 7 |
| 2004 | 2 | 12 |
| 2005 | 7 | 7 |
| 2006 | 6 | 2 |
| 2007 | 4 | 6 |
| 2008 | 0 | 9 |
| 2009 | 6 | 7 |
| 2010 | 1 | 10 |
| 2011 | 5 | 6 |
| 2012 | 6 | 10 |
| 2013 | 7 | 5 |
| 2014 | 6 | 3 |
| 2015 | 1 | 12 |
| 2016 | 9 | 8 |
| 2017 | 10 | 9 |
| 2018 | 16 | 16 |
| 2019 | 7 | 9 |
| 2020 | 13 | 16 |
| 2021 | 9 | 10 |
| 2022 | 9 | 12 |
| 2023 | 18 | 15 |
| 2024 | 6 | 11 |
| 2025 | 9 | 15 |
| 2026 | 9 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and machine for belling PVC-O pipes6 Oct 2026US 12,752,475 B2Sica S.P.A.
- Constant strain PEX expansion tool head1 Sep 2026US 12,722,338 B2Zurn Water, LLC
- Tool and method for roll grooving a workpiece25 Aug 2026US 12,715,054 B2Milwaukee Electric Tool Corporation
- Tapered implantable device and methods for making such devices7 Jul 2026US 12,672,949 B2W. L. Gore & Associates, Inc.
- Apparatus for mechanical machining by plastic deformation or for assembling a pair of components, and relative machine tool comprising such an apparatus12 May 2026US 12,623,271 B2GNUTTI TRANSFER S.p.A.
- Tube expansion tool1 Oct 2026US 2026/0295652 A1Makita Corporation
- Pex expansion tool17 Sep 2026US 2026/0273609 A1Milwaukee Electric Tool Corporation
- Machine for belling pvc-o pipes20 Aug 2026US 2026/0241634 A1Sica S.P.A.
- Pipe expander30 Jul 2026US 2026/0216780 A1Emerson Professional Tools (Shanghai) Co., Ltd.
- System for biaxial expansion of polymeric pipe2 Jul 2026US 2026/0184009 A1Wavin B. V.
Most cited
By later US patents
- Apparatus and method for making flanged graft for end-to-side anastomosis88US 6,190,590 B1Impra, Inc. · 2001
- Production of socket ends in thermoplastic pipes63US 4,299,412 ARieber & Son A/S · 1981
- Method for forming an annular groove in a thermoplastic pipe59US 4,107,249 ASekisui Kagaku Kogyo Kabushiki Kaisha · 1978
- Method for flange bonding57US 6,946,050 B2NIKE, Inc. · 2005
- Mould and sealing ring56US 4,818,209 AForsheda AB · 1989