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Class Information
Number: 366/323
Name: Agitating > Stirrer within stationary mixing chamber > Rotatable stirrer > Screw-type stirrer > Varying diameter of convolutions or shank or varying pitch
Description: Subject matter wherein the helical ribbon changes diameter along its length, or the diameter of a shaft supporting the ribbon changes, or the distance between the convolutions of the helical ribbon changes.

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8342738 Vertical mixer with deflectors Jan. 1, 2013
8177417 Apparatus for continuous blending May. 15, 2012
8152358 System and apparatus to deliver low-inclusion feed ingredients into livestock ration Apr. 10, 2012
8070350 Clay extruder Dec. 6, 2011
7596963 Conveyor screw for use as surface scraper in cooling and freezing units Oct. 6, 2009
7437105 Developing device and image forming apparatus Oct. 14, 2008
7347613 Apparatus for continuous blending Mar. 25, 2008
7320539 Concrete batching facility and method Jan. 22, 2008
7305206 Xerographic developer unit having variable pitch auger Dec. 4, 2007
7131765 Helical-ribbon mixer Nov. 7, 2006
7040801 Mixing apparatus with non-concentric auger May. 9, 2006
6983902 Zootechnical use shredding and mixing apparatus for a truck Jan. 10, 2006
6969191 Linkage mechanism for a vertical mixer Nov. 29, 2005
6817752 Auger device for a vertical mixer Nov. 16, 2004
6811295 Batch mixer and a mixing rotor for the same Nov. 2, 2004
6609819 Twin screw extruder with conical non-parallel converging screws Aug. 26, 2003
6382826 Compact extruder with multiple parallel screws having a variable pitch arrangement May. 7, 2002
6331069 Concrete extrusion machine and spiral conveyor therefor Dec. 18, 2001
6136246 Screw extruder with improved dispersive mixing elements Oct. 24, 2000
6080346 Extrusion apparatus and method and extruded thermoplastic polymer Jun. 27, 2000
6076954 Continuous vacuum processor with integral raw material mixing Jun. 20, 2000
6007272 Asphalt paver with remixing conveyor system Dec. 28, 1999
5965173 Plasticating apparatus and screw therefor Oct. 12, 1999
5932159 Screw extruder with improved dispersive mixing Aug. 3, 1999
5863122 Vertical feed mixer with auger having corners Jan. 26, 1999
5855432 Method and apparatus for eliminating gel contained in polymer Jan. 5, 1999
5842090 Developing device having a member for restricting transport of developer Nov. 24, 1998
5840345 Dough transport device Nov. 24, 1998
5833361 Apparatus for the production of small spherical granules Nov. 10, 1998
5823675 Stepped helical scraper blade for ice cream maker Oct. 20, 1998
5753498 Garbage treating apparatus May. 19, 1998
5662415 Conveyor for degassing of mixtures for solid surface products and method of use Sep. 2, 1997
5657115 Rotary developing device for an image forming apparatus Aug. 12, 1997
5601362 Vertical feed mixer with feed deflectors Feb. 11, 1997
5570953 Mud-mixing machine for drywall texturing and other applications Nov. 5, 1996
5540900 Reactors and apparatus for the physico-chemical treatments of substances in the solid, liquid or gaseous state Jul. 30, 1996
5505537 Conical-bottom silo, particularly suitable for small-sized plastic material and rubber with high elasticity properties, having a discontinuous screw stirrer Apr. 9, 1996
5462354 Livestock feed mixer Oct. 31, 1995
5421650 Mixing machinery of the transfermix type Jun. 6, 1995
5411710 Apparatus for processing materials May. 2, 1995
5370456 Continuous kneading apparatus provided with rotatable kneading members and fixed kneading members Dec. 6, 1994
5358331 Blending device for particulate material, with helical conveyer Oct. 25, 1994
5342125 Feedscrew for injection molding and extrusion Aug. 30, 1994
5265955 Machine for the extrusion of thermoplastic polymers and the like comprising an internal mixer Nov. 30, 1993
5240321 Vertical screw mixer Aug. 31, 1993
5204721 Developer auger for use in an electrophotographic printing machine Apr. 20, 1993
RE34172 Continuous mixer Feb. 2, 1993
5166732 Developer agitating method and developer agitating apparatus Nov. 24, 1992
5143626 Sludge dehydrater having specially designed augers and infrared heater elements Sep. 1, 1992
5123748 Mixing device with central thermal element Jun. 23, 1992

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