Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 5725057 | Device for crushing stubble A device for crushing stubble comprising a rotatable crushing element supported by a frame. The frame is coupled by a pivotable connection to a drive mechanism which moves the device in a predefined direction across the stubble. The pivotable connection a... | 03/10/1998 |
| 5353881 | Counter-rotating twin shaft system for gardening machines A gardening utility machine having a counter-rotation twin shaft system can perform multiple types of work required for gardening (tilling, soil removal, weeding, raking and shredding of leaves), snow/ice removal and for power de-thatching and mowing of l... | 10/11/1994 |
| 4607704 | Power rake A lightweight hand propelled power rake having a motor driven rotatable rake wheel providing a plurality of radially extending prongs arranged in a plurality of sets, with the prongs of each set projecting through a sole plate. The device includes a metho... | 08/26/1986 |
| 4260027 | Flail-type mulcher cultivator A rotatable flail-type agricultural implement is disclosed which includes a central axle and a plurality of radially and circumferentially spaced, flexible, hammer-supporting chains presenting a plurality of ground crop-engaging flails upon rotation of th... | 04/07/1981 |
| 4249613 | Cultivating apparatuses and process The apparatuses comprise a horizontally extending rigid frame and a plurality of reel and shaft assemblies, those reel and shaft assemblies each comprising a pair of parallel axle shafts and a set of reels rotatably supported on each of said shafts; the p... | 02/10/1981 |
| 4172501 | Self propelled cage wheel tractor Disclosed herein is a self propelled drum wheel tractor for use in puddling rice paddies. A pair of drums having a plurality of knife elements disposed thereon serve to bury or puddle the rice stalk, while the field is still flooded.... | 10/30/1979 |
| 4077477 | Soil cultivating implements According to this invention there is provided a soil cultivating implement comprising a plurality of downwardly extending tines arranged in a transverse row and rotatable ground engaging members that are located in front of and behind the row of tines wit... | 03/07/1978 |
| 4044841 | Rotary tiller device adapted for chopping A device in the nature of a rotary tiller equipped for traveling through fields as well as uneven terrain, for effectively chopping up encountered clods, vegetation and debris, and mixing same with the soil. We utilize a framework in which either of two d... | 08/30/1977 |
| 3957122 | Rotary ploughs A rotary plough has one or more rotors rotatably mounted to be driven via a power take off about a horizontal axis that extends transverse to the direction of travel. Each rotor has a central support and axis of rotation and two spaced apart and oppositel... | 05/18/1976 |
