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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 |
| 7743844 | Crop residue and soil conditioning agricultural implement A disc harrow composed of one or more disc gangs has a subframe coupled to the disc gangs to move the disc gangs in response to variations in farmland terrain to limit the impact of obstructions when encountered during the harrowing process. When the obstruction is ... | 06/29/2010 |
| 7288724 | Method of manufacturing multilayer wiring substrate, and multilayer wiring substrate A method of manufacturing a multilayer wiring substrate, which can preserve the dimensional stability of a conductor pattern at a fine pitch, solve the restriction on a process from the viewpoint of material selection, and further reduce a manufacturing cost, and a ... | 10/30/2007 |
| 7089692 | Slip hitch for a snow plow A slip hitch connection to a drive vehicle for a snow plow comprises an elongated flat planar member that can be hooked on to a connecting lug of the drive vehicle, the flat planar member being mounted on the snow plow frame for reciprocal movement in each of a pair... | 08/15/2006 |
| 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 |
| 6792704 | Air spring actuator weight transfer apparatus This invention relates to using the expansion force of an air spring, coupled between a snowplow vehicle and the attached snowplow, so that contact between ground engaging components of the snowplow and the road can be controlled, either automatically or manually. T... | 09/21/2004 |
| 6691629 | Planter coulter apparatus with hydraulic overload protection An overload protection apparatus for use with a planter apparatus including a coulter bar and coulter/fertilizer units mounted thereto, the coulter bar pivotally mounted to the underside of a wheel supported carrier frame designed for transport in a trans... | 02/17/2004 |
| 6454019 | Agricultural implement down pressure system An agricultural implement includes a frame, a grow medium manipulation surface configured to manipulate and move a growing medium and at least one elastomeric torsion element coupled to the surface. The growing medium manipulation surface moves between a ... | 09/24/2002 |
| 5988291 | Soil penetrating tool assembly A soil penetrating tool assembly (10) having a tool shank (18) which is pivotally mounted so as to clear obstructions in the ground. Movement of the shank away from its normal attitude is opposed by a hydraulic ram (22). The force required to be exerted b... | 11/23/1999 |
| 5921010 | Flow blade operating system A plow blade operating system having a plow or scraper is configured to quickly and retractably overcome obstacles that are encountered during plowing, scraping, and leveling activities without the need to recharge or reset the system pressure after the o... | 07/13/1999 |
| 5727636 | Shank assembly with a shear release assembly for a row cultivator A row cultivator (10) includes a row following system (12) coupled to a toolbar (13) employing frame members (17) and (18) constrained to remain parallel by a cross member (21). Coulter wheels (30) and (31) secured to the frame members (17) and (18) are n... | 03/17/1998 |
| 5197552 | Collapsible bar assembly for agricultural equipment A collapsible bar assembly which is particularly useful in couplings between a tractor and an agricultural implement, the collapsible bar assembly having first and second bars which are normally co-linear but which rotate relative to one another when a pr... | 03/30/1993 |
| 5178220 | Device for controlling the attitude of an implement drawn by an agricultural machine The device is mounted in an agricultural machine comprising two links for drawing an implement, a lifter member and a central control unit for controlling the member. The device comprises: two horizontal bars carried in the form of brackets from the chass... | 01/12/1993 |
| 5072793 | Trip assembly A trip assembly for a ground-working implement includes a rigid toggle member and a spring toggle member that are pinned, respectively, at a first point to a ground-engaging tool and at a second point to a frame. The rigid toggle member and the spring tog... | 12/17/1991 |
| 4320589 | Snowplow apparatus An improved snowplow apparatus provided with articulated quadrilateral means permitting vertical movement of a snow clearing blade which is kept in a lowered position by a compressed gas accumulator communicating with one or two hydraulic cylinders connec... | 03/23/1982 |
| 4312407 | Spring trip mechanism for plows A trip mechanism 41 for a plow standard 11 includes a pair of toggle links 46, 61 having their remote ends pivotally connected, respectively, to a plow frame 15 and the standard 11. Link 61 includes a leaf spring 63 with a rolled end 86 pivotally connecte... | 01/26/1982 |
| 4236613 | Coupling member An elongated coupling member is connectable to the upper link of a three point tractor lift and to an implement carried by the lift, such as a spreader. The member includes a piston slideably mounted in a cylinder and a hydraulic circuit between a space a... | 12/02/1980 |
| 4004641 | Motor grader drawbar assembly with safety clutch mechanism The motor grader drawbar assembly has a blade mounted on a circle gear and a drive gear selectively rotates the circle gear and the blade via a pinion gear engaged with the circle gear and mounted on a rotatable shaft. A slip clutch is interposed between ... | 01/25/1977 |
| 3998276 | Plow and earth fragmentation machine This invention relates to earth processing equipment and, more particularly, to a scarifier or plow apparatus capable of deep soil penetration which has an attached earth fragmentation assembly. The apparatus comprises a frame mounting on its forward end,... | 12/21/1976 |
| 3972374 | Trip mechanism for ground working implement A spring bias safety trip mechanism for holding a ground working tool in a fixed position with respect to a support frame is disclosed herein. The spring bias safety trip mechanism consists of a plurality of links that are interconnected in such a manner ... | 08/03/1976 |
| 3960220 | Subsoil plow This invention relates to a subsoil plow which includes a supporting frame having front and rear sides. A plurality of plow elements are mounted on the frame for pivotable movement on a horizontal axis in a direction fore and aft of the frame. The plow el... | 06/01/1976 |
