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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 6926093 | Mechanism for mounting a soil leveling device A mechanism for mounting a soil leveling device to the mounting arm of a leveling attachment operates in either a fixed setting or a floating setting. The mechanism includes a rearwardly extending carrier arm which carries the soil leveling device at its distal end.... | 08/09/2005 |
| 5323862 | Moldboard plow trip A moldboard support is pivotally hinged to its carrier and has a medial rearward portion pivotally connected to a lower link, the upper portion of the link having an arcuate ramp with a portion engaging a detent mounted in an upper link that is pivotally ... | 06/28/1994 |
| 4579362 | Laterally yieldable hitch pole for trailing vehicles A laterally yieldable or "bendable" hitch pole is provided for the steering mechanism of a trailing vehicle to minimize or prevent breakage of the hitch pole during sharp turns negotiated by the draft vehicle, especially during backing of the trailer. The... | 04/01/1986 |
| 4312408 | Overload tool mounting assembly for soil tilling implement An assembly for mounting the shank of a ground tool to a clamping plate carried on the tool bar of a soil tilling farm implement. The mounting assembly has a mounting member for attachment to the clamping plate, a first pivotal connection of the tool shan... | 01/26/1982 |
| 4293043 | Soil undercutter with trip release for pivotally mounted shank The present invention relates to a shank assembly for a soil undercutter, which is similar to an extremely wide cultivator shovel which travels underneath the ground and cuts the roots from weeds and plants without substantially disturbing the surface of ... | 10/06/1981 |
| 4167977 | Toggle link trip mechanism An earthworking unit having a toggle trip mechanism for holding an earthworking tool in an earthworking position and allowing the tool to move upwardly to a release position. The toggle trip mechanism has a pair of links pivotally connected with an eccent... | 09/18/1979 |
| 4116281 | Fast clamp chisel trip A fast clamp chisel trip apparatus is disclosed for use with a chisel plow having a frame with a tool attached thereto with means for lowering and raising the tool to positions for working and for transporting said plow, respectively. The embodiment of th... | 09/26/1978 |
| 4077478 | Down pressure control mechanism for grain drills A down pressure control for use with furrow openers in grain drills which provides a spring load for maintaining down pressure on the furrow opener during normal operating conditions and which can be at relatively high rate to permit minimum tillage, or w... | 03/07/1978 |
| 4068723 | Floating beam plow A beam for supporting an earth working tool, such as a moldboard plow, which is made so that it will float vertically over obstacles that do not hook the earth working tool, and which also includes linkage that will trip to provide clearance over obstacle... | 01/17/1978 |
| 4054177 | Trip beam linkage A trip beam linkage for moldboard plow or other earth working tools which trips to clear obstacles such as rocks and the like and uses a sturdy, compact and reliable folding tripping linkage which permits reliable, high clearance tripping using tension sp... | 10/18/1977 |
| 3976144 | Spring automatic reset plow assembly with reset damper system An automatic reset plow assembly includes a plow frame drawn by an agricultural vehicle. A plow standard is pivotally connected to the underside of the frame to enable the plow share to pivot backwardly and upwardly upon engaging an obstruction in the soi... | 08/24/1976 |
| 3949814 | Spring automatic reset plow assembly An automatic reset plow assembly includes a plow frame drawn by an agricultural vehicle. A plow standard is pivotally connected to the underside of the frame to enable the plow share to pivot backwardly and upwardly upon engaging an obstruction in the soi... | 04/13/1976 |
