Thomas Edison obtained a patent for an electrographic vote recorder.
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| Number | Title | Issue Date |
| 7677324 | Turf slicer with vertical oscillator A turf slicer includes a gang of six slicer wheels that “walk” through the turf in response to the forward motion of the turf slicer. In the meantime, the power takeoff from the tractor vertically oscillates the slicer wheels out of phase with one another, so th... | 03/16/2010 |
| 6166331 | Device and method relating to cable branching The present invention relates to the field of arrangements at cable branchings and methods for manufacturing cable branches. One or more main conductors in the main cable are cut and released from the main cable. The cut and released main conductors are s... | 12/26/2000 |
| 6076289 | Scarifier machine with a shaking milling drum A scarifier machine has a milling drum partially enclosed in a protective sump which is suspended from the frame of the machine by a linkage assembly. The protective sump of the scarifier machine is connected to the frame of the machine by shaking members... | 06/20/2000 |
| 5983533 | Scarifer machine with a shaking milling drum A scarifier machine has a milling drum partially enclosed in a protective sump which is suspended from the frame of the machine by a linkage assembly. An eccentric drive reciprocates the sump relative to the frame.... | 11/16/1999 |
| 5398767 | Ground treatment apparatus A lawn treatment apparatus includes an open-bottomed support body having three treatment implements in the form of spiking devices or brushing/sweeping devices adapted to move through the open bottom. The support body carries a driving mechanism to drive ... | 03/21/1995 |
| 5209306 | Turf aerator with improved bearings for lateral tine movement An apparatus for aerating turf including a mounting frame (11) for mounting the apparatus to the hydraulic lift system (12) of a utility tractor. A trailer support frame (13) is pivotably mounted to the mounting frame (11) so as to enable the trailer supp... | 05/11/1993 |
| 5029652 | Turf aerator with lateral tine movement An apparatus for aerating turf including a mounting frame (11) for mounting the apparatus to the hydraulic lift system (12) of a utility tractor. A trailer support frame (13) is pivotably mounted to the mounting frame (11) so as to enable the trailer supp... | 07/09/1991 |
| 4901655 | Cultivator A special cultivating machine, lawn care apparatus and process are provided to properly prepare, efficiently condition, and gently cultivate the soil, turf and lawn in a uniform manner without uprooting, ruining, or damaging existing healthy plants and gr... | 02/20/1990 |
| 4867244 | Turf aerating apparatus A walk-behind turf aerating apparatus includes two pairs of tine arm assemblies, each assembly having a pair of vertically reciprocating tine arms for driving coring tines into the turf. A tine arm return mechanism includes a gear box for each pair of tin... | 09/19/1989 |
| 4750565 | Turf aerating apparatus A turf aerator includes a wheel-supported frame and drive means for propelling the frame across the ground at a predetermined rate. A pair of substantially vertical tine arms each having a plurality of downwardly directed turf coring tines attached to the... | 06/14/1988 |
| 4619552 | Vibration proof suspension type vibrating roller An improved vibration proof suspension type vibrating roller is disclosed which includes a rolling roller rotatably supported in a frame structure, a hydraulic motor for rotating the rolling roller and a hydraulic motor for rotating a vibration generating... | 10/28/1986 |
| 4586847 | Vibratory mechanism A road compacting drum is equipped with a dual amplitude, rotational, vibratory mechanism. A shaft rotatably mounted on the drum supports eccentric weights. Casings secured to the shaft adjacent the weights have chambers accommodating fluent mass. The flu... | 05/06/1986 |
| 4365673 | Tiller head with shiftable blades A tiller head for a soil tilling device including a shaft which carries a number of blades which rotate with the shaft, and a drive for causing rotation of the shaft. A housing surrounds the drive. At least one of the blades is mounted for oscillatory mov... | 12/28/1982 |
| 4250969 | Mechanical hoe A cultivating attachment mounted on a tractor is driven by the power take-off drive of the tractor to simulate the customary action of a hoe when it is manually manipulated. The desired effect is achieved by providing a pair of ground engaging rotatable c... | 02/17/1981 |
| 4235294 | Soil cultivating machine A machine for cultivating the soil has a main transverse beam carrying a transverse tool shaft driven to drive wobble bearings on the tool shaft, thereby to oscillate a plurality of tool holders having lever arms guided for transverse swinging movement in... | 11/25/1980 |
| 4202415 | Soil cultivating machine A machine for cultivating the soil has a main transverse beam carrying a transverse tool shaft, and a gear box for driving the tool shaft. The beam has a frame for attaching the machine to the conventional three-point hydraulic system of a tractor, the tr... | 05/13/1980 |
| 4171021 | Soil cultivating implements A cultivating implement has a supporting frame and elongated tined beams, extending transverse to the direction of travel, located below the frame. Each tined beam is connected to respective eccentric mechanisms mounted on two rotatable shafts that extend... | 10/16/1979 |
| 4154305 | Aerator apparatus An apparatus for aerating lawns or the like which features a novel construction wherein the tines include a rotating drilling action with a forward and downward motion to effectively aerate the turf as well as impart a forward walking type action to the a... | 05/15/1979 |
| 4111263 | Soil tilling machines A tilling machine has a frame with a row of tines or rotatable tined soil working members in a row that extends transverse to the direction of travel. A drive is connected to rock the tines or rotate the tined members during operation. The same drive has ... | 09/05/1978 |
| 4072196 | Cultivators A cultivator has groups of soil working members positioned in a row that extends transverse to the direction of travel. Each group includes a plurality of tined soil working members and a drive system that rotates each group as well as the individual soil... | 02/07/1978 |
| 4044839 | Soil cultivating machines A soil cultivating machine has side-by-side working members mounted on upwardly extending shafts that extend slightly forward with respect to the direction of travel. Each working member includes radial arms and at the outer end of each arm a tool, such a... | 08/30/1977 |
| 3954143 | Rotary ploughs A rotary plough has a rotor that rotates about a horizontal axis defined by a central support. The rotor comprises three spaced apart groups of soil working tines and each group includes a row of tines mounted on arms that extend radially with respect to ... | 05/04/1976 |