Abstract: An energy conversion system includes rotor, stator and shell components configurations for increasing power efficiency and improving replacement and repair efficiency. The system harvests environmental energy for lower power generation and accounts for non-mechanical sources of rotational resistance within the generator.

Abstract: A differential signal transmission cable includes a pair of center conductors for transmitting a differential signal, an insulator covering peripheries of the center conductors, a shield tape longitudinally wrapped around the insulator, an insulating tape including an adhesive surface and spirally wrapped around the shield tape while the adhesive surface faces inside, and a non-adhesive tape provided between the shield tape and the insulating tape along a longitudinal direction, and non-adhesively covering a part of an outer periphery of the shield tape in a circumferential direction.

Abstract: A power cultivator including a power source, a shaft and a cultivating head having a pair of cultivating blades is described. The cultivating head includes an assembly that opens and closes the blades using a mirrored arcuate motion. The cultivating head itself is also part of the invention in that it can be attached to a standard string trimmer in place of the standard string trimming assembly. The power cultivator is effective at cultivating small areas of soil, in which a gardener usually uses a common goose-neck garden hoe.

Abstract: An agricultural implement with one or more pairs of knives which are eccentrically mounted on rotary knife holders and extend from the underside of a housing which can be pulled or pushed by hand or by an engine. The knives of each pair orbit in the same direction and cooperate as the blades of shears to loosen and comminute the ground. The holders are driven by a motor and the cutting edges of the knives constitute helices extending counter to the direction of orbital movement of the respective knives.

Abstract: A cultivating tool comprises a housing, an electric motor mounted within the housing, a pair of soil working members which project from the housing, an elongate shaft connected at one end to the housing, and a handle at the other end of the shaft. The soil working members are of generally lamellar construction and arranged to be reciprocated relative to one another transverse to the direction from which they project from the housing and in adjacent parallel planes. The tool handle incorporates a switch with a lock off mechanism. In normal use of the tool the soil working members penetrate into soil to be cultivated and disturb the soil.