B28B 21/24
Using compacting heads, rollers, or the like
Official title: using compacting heads, rollers, or the like
B28B21/24 (Using compacting heads, rollers, or the like) appears on 48 US grants and 17 published applications in this corpus.
Search patents in B28B- Granted patents
- 48
- Published applications
- 17
- Assignees
- 25
- Inventors
- 57
- Latest grant
- 15 Mar 2016
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 0 | 3 |
| 2005 | 0 | 1 |
| 2006 | 2 | 2 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 1 | 0 |
| 2011 | 1 | 2 |
| 2012 | 1 | 1 |
| 2013 | 1 | 2 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 1 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
- B28B 21/26With a packer head serving as a sliding mould or provided with18
- B28B 21/28Combined with vibration means13
- B28B 21/242The working diameter of the compacting mechanism being adjustable3
- B28B 21/245Using a horizontal compacting roller in a horizontally rotatable mould3
- B28B 21/247The rollers of the compaction head being driven2
Recent patents
- Manufacturing apparatus and method of forming a preform15 Mar 2016US 9,283,734 B2Gunite Corporation
- Concrete roller head17 Mar 2015US 8,979,520 B2Hawkeye Concrete Products Co.
- Devices and methods of making hollow concrete elements18 Jun 2013US 8,465,687 B2Telefonaktiebolaget LM Ericsson (publ)
- Method for making precast concrete meter pit9 Oct 2012US 8,282,869 B2Precast Concepts, LLC
- Method and an apparatus for the manufacture of concrete pipes29 Nov 2011US 8,066,931 B2Pedershaab Concrete Technologies A/S
- Packerhead machine18 Aug 2016US 2016/0236374 A1Hawkeye Concrete Products Co.
- Concrete roller head14 Nov 2013US 2013/0302462 A1Hawkeye Concrete Products Co.
- Precast concrete meter pit and apparatus for making same31 Jan 2013US 2013/0026162 A1Precast Concepts, LLC
- Manufacturing Apparatus And Method Of Forming A Preform19 Jul 2012US 2012/0183707 A1Gunite Corporation
- Method And An Apparatus For The Manufacture Of Concrete Pipes29 Dec 2011US 2011/0318446 A1Pedershaab Concrete Technologies A/S
Most cited
By later US patents
- Machine and method for making concrete product17US 4,340,553 AHydrotile Machinery Company · 1982
- Packerhead pipe making machine16US 4,118,165 AHydrotile Canada Limited · 1978
- Concrete pipe making machine15US 4,957,424 AHydrotile Machinery Company · 1990
- Apparatus for forming concrete pipe of uniform density including control means to vary feed rate of concrete/aggregate as function of packerhead torque12US 4,406,605 AKerr Concrete Pipe Company · 1983
- Packerhead with elastic rollers12US 4,690,631 AHydrotile Machinery Company · 1987