Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 5255895 | Gear transmission in a lifting machinery A gear transmission for a lifting machine has at least a one step cylindrical gear transmission rotatably carried at least partly inside a rope drum. The cylindrical gear transmission and a planetary gear transmission are coupled to constitute a combined ... | 10/26/1993 |
| 5048644 | Method for improving the performance of a motor controlled hydraulic elevator The invention concerns a method and apparatus for improving the performance of a motor-controlled hydraulic elevator, in which oil is pumped using an hydraulic pump controlled by an electric motor from a container via a main supply duct into a lifting cyl... | 09/17/1991 |
| 4895241 | Apparatus for distribution of logs into grinder supply shafts Apparatus is disclosed for the distribution of logs into the supply shafts of a plurality of successive grinders from a conveyor line consisting of several belt, chain or other conveyors placed in succession and carrying the logs transversely thereon. The... | 01/23/1990 |
| 4811820 | Disk brake motor A disk brake motor comprises an electric motor having a housing, an electromagnet, at least one friction surface and a brake wheel which is in contact with the friction surface during braking, the brake wheel including an impeller for drawing in and impel... | 03/14/1989 |
| 4774987 | Apparatus for feeding roundwood into a rotating barking drum An apparatus for feeding roundwood into a rotating debarking drum through the inlet end of the barking drum utilizing a conveyor. The prior method presents the drawback that it is not possible, with a single feed device, to feed into the barking drum roun... | 10/04/1988 |
| 4732523 | Ship unloading mechanism A ship unloading mechanism has an endless, vertically operating compartmented belt conveyor by which material to be lifted is transported from a ship's hold at the lower end of the conveyor onto a horizontal conveyor at the top end of the conveyor, when t... | 03/22/1988 |
