Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7025555 | Sweep auger with drive assembly A sweep auger having an auger that is rotated about its longitudinal axis by a power means and a drive assembly having at least three reduction gears that operatively connect the auger to a drive wheel such that the drive wheel rotates at a speed that is substantial... | 04/11/2006 |
| 6606841 | Tray lift mechanism An apparatus for automatically loading trays includes a servo motor that is mechanically coupled to a plurality of elongated engagement members. The engagement members are coupled to the servo motor at a first end and include engagement elements at the se... | 08/19/2003 |
| 6095742 | Center column and stored material support and transfer structure for reclaimer An enclosed granular or powdered material storage reclaimer, having a floor, a vertical column at the center of the floor, conveyor means disposed below the floor, elongate transfer device hingedly attached to the column, an anchor pedestal for anchoring ... | 08/01/2000 |
| 5967729 | Bottom discharge, rotating ring drive silo unloader This invention relates to a top loading, top unloading bottom discharge, ring drive silo unloader that is adapted for use with a hexapod suspension. The unloader features a stationary support frame with an open center concept. The support frame includes t... | 10/19/1999 |
| 5785483 | Bulk storage reclamation system and method The present invention is a bulk storage facility having a reclaim system for providing a continuous controlled feed of difficult to handle cohesive materials characterized by their tendency to pack together to form relatively self-sustaining walls which a... | 07/28/1998 |
| 5769590 | Grain sweep drive apparatus A drive mechanism for a radially extending grain sweeper that includes an auger for directing grain into a central opening in the floor portion of a grain storage container, said drive mechanism includes a housing coupled with the grain sweeper, a drive s... | 06/23/1998 |
| 5642977 | Silo unloader The present invention provides a silo unloader which combines the advantages of both a single auger unloader and a double auger unloader and substantially eliminates the disadvantages of both, to create a silo unloader that is very efficient and effective... | 07/01/1997 |
| 5511925 | Bin unloading apparatus A bin unloading apparatus includes a housing attachable to a bin floor. The housing has an interior cavity, a rotatable lower portion with an intake opening, and a stationary upper portion with an output opening. A sweep auger is secured to the rotatable ... | 04/30/1996 |
| 5366067 | Extraction device and storage area equipped with such a device An extraction device comprises an inclinable scraper shaft driven in rotation along a first vertical axis of rotation, thereby extracting bulk products stored over a storage area having at least one evacuation opening. The extraction device comprises a su... | 11/22/1994 |
| 5318444 | Grain storage unloading system This invention relates to a grain storage unloading system of a type which can be moved from grain bin to grain bin and includes a sweep section which can rotate relative to a discharge section to sweep a circular area within the bin and to carry the mate... | 06/07/1994 |
| 5190140 | Material handling apparatus An impeller assembly having a housing supporting a rotatable impeller. The housing has a bottom entrance opening and a top exit opening separated by a curved back wall. A liner of low friction and abrasion resistant plastic material located adjacent a por... | 03/02/1993 |
| 5147030 | Impeller assembly An impeller assembly having a housing supporting a rotatable impeller. The housing has a bottom entrance opening and a top exit opening separated by a curved back wall. A liner of low friction and abrasion resistant plastic material located adjacent a por... | 09/15/1992 |
| 5099983 | Portable auger system apparatus and method for depositing gypsum into an irrigation ditch A portable sweep auger apparatus and method for controllably transferring predetermined continuous amounts of granular and powdered gypsum from a pile of gypsum to an irrigation ditch. The apparatus includes a base member, a driver member and an auger ass... | 03/31/1992 |
| 5099984 | Telescopic auger A clean-out auger for a grain bin has a main auger, a telescoping sweep and a rotary joint connecting the two. The sweep may be adjusted in length to accomodate bins of different sizes. The use of a flexible screw section through the rotary joint allows t... | 03/31/1992 |
| 5035317 | Impeller assembly with adjustable impeller An impeller assembly having a housing supporting a rotatable impeller. The housing has a bottom entrance opening and a top exit opening separated by a curved back wall. A liner of low friction and abrasive resistant plastic material covers the inside of t... | 07/30/1991 |
| 4964502 | Impeller assembly An impeller assembly having a housing supporting a rotatable impeller. The housing has a bottom entrance opening and a top exit opening separated by a curved back wall. A liner of low friction and abrasive resistant plastic material covers the inside of t... | 10/23/1990 |
| 4790111 | Reducing hoop stress in silos Means for reducing hoop stress in a silo cell comprising a grain tube located in the lower part of the silo cell, the wall of the grain tube having apertures at the silo base allowing entry of granular material into the grain tube, and a restrictor below ... | 12/13/1988 |
| 4564317 | Silo for storing solidifying loose material, especially flue dust Silo for storing solidify loose material, especially flue ash, which has a conveyor which can be moved on the surface of the stored material and which feeds the material loosened there to a conveyor device located in the silo which brings it to an exit op... | 01/14/1986 |
| 4334818 | Final unloading apparatus When particulate material reposing on a support or base is to be carried off in an upward direction by means of a vertical conveyor whose lower inlet end portion is vertically and laterally movable, there is a problem involved in the carrying-off of the f... | 06/15/1982 |
| 4071977 | Automatic silo door construction Automatically actuable silo door apparatus and a silo equipped with same. The apparatus preferably comprises a door member adapted to selectively block a silage discharge orifice, a hinge assembly for mounting the door, retractable gun means for automatic... | 02/07/1978 |
| 3968998 | Top unloader for silos The unloader serves to remove chopped silage from a circular silo. A frame is adapted to be supported on the inside surface of a peripheral wall of the silo and to be lowered in said silo when silage has been removed. A unit is carried by said frame and m... | 07/13/1976 |
