Abstract: A trimmer head wherein the driveline of the power tool is connected to a core member. A spool is mounted to the core member and directly driven by the core member. A housing is mounted for axially sliding on the core member and a spring urges axial movement of the housing relative to the core member. Interlocking structure on the spool and housing produces interlocking for common rotation of the spool and housing responsive to urging by the spring. Release of the interlocking structure is affected by opposing said spring urging. Desirable additional features include selective alternate positioning of the spring for automatic and manual only release of said interlocking and a line loading assist provided by a tubular post through the spool alignable with housing eyelets for threading line through the eyelets and spool and winding thereof onto the spool by manual turning of the spool relative to the housing.

Abstract: A thermal control system for an engine and/or peripheral components is disclosed wherein a fan may be actively coupled and decoupled from an engine's shaft based on a sensed parameter such as engine temperature, alternator temperature and/or supply fuel temperature. In one embodiment, the temperature is sensed at or near the engine thermostat or peripheral component and a controller controls an electromagnetic clutch to cause the fan to engage and disengage a shaft of the engine.

Abstract: A trimmer head wherein the driveline of the power tool is connected to a core member. A spool is mounted to the core member and directly driven by the core member. A housing is mounted for axially sliding on the core member and a spring urges axial movement of the housing relative to the core member. Interlocking structure on the spool and housing produces interlocking for common rotation of the spool and housing responsive to urging by the spring. Release of the interlocking structure is affected by opposing said spring urging. Desirable additional features include selective alternate positioning of the spring for automatic and manual only release of said interlocking and a line loading assist provided by a tubular post through the spool alignable with housing eyelets for threading line through the eyelets and spool and winding thereof onto the spool by manual turning of the spool relative to the housing.

Abstract: A hand held power driven sweeper that is supported on brush assemblies. The brush assemblies are horizontally mounted on the end of a handle component. The brush assemblies are readily mounted and removed from the handle component. A power component on the opposite end of the hand component provides motive power for the brush assemblies. The brush assemblies have bristles selected from a diameter and length range to provide a bristle density that provides a desired sweeping action as well as support for the sweeper. The bristles are of the type that will have a slight break over to produce the sweeping action.