Abstract: An improved head for use with a concrete vibrator for settling concrete/aggregate is provided. The head includes a hollow casing with an eccentric rotor having a curved segment along one side and supported for rotation by a bearing at a first or drive end. A second bearing is provided adjacent a second, distal end of the rotor. In one embodiment, the second bearing includes a bushing of disparate material, such as brass. A lubricant in the casing forms a thin, high pressure oil film between the bushing and the internal surface of the distal end cap, as well as between the curved segment of the rotor and the internal surface of the casing. Since the eccentricity of the rotor is extended, enhanced vibration is obtained. In this first embodiment, the bushing is brazed to the distal end of the rotor and the casing is steel. The bushing is arcuate and is positioned in close proximity to the internal surface of the distal end cap along the curved segment and at its axial edge.

Abstract: An improved head for use with a concrete vibrator for settling concrete/aggregate is provided. The head includes a hollow casing with an eccentric rotor having a curved segment along one side and supported for rotation by a bearing at a first or drive end. A second bearing is provided adjacent a second, distal end of the rotor. In one embodiment, the second bearing includes a bushing of disparate material, such as brass. A lubricant in the casing forms a thin, high pressure oil film between the bushing and the internal surface of the distal end cap, as well as between the curved segment of the rotor and the internal surface of the casing. Since the eccentricity of the rotor is extended, enhanced vibration is obtained. In this first embodiment, the bushing is brazed to the distal end of the rotor and the casing is steel. The bushing is arcuate and is positioned in close proximity to the internal surface of the distal end cap along the curved segment and at its axial edge.

Abstract: An improved head for use with a concrete vibrator for settling concrete/aggregate is provided. The head includes a hollow casing with an eccentric rotor having a curved segment along one side and supported for rotation by a bearing at a first or drive end. A second bearing is provided adjacent a second, distal end of the rotor. In one embodiment, the second bearing includes a bushing of disparate material, such as brass. A lubricant in the casing forms a thin, high pressure oil film between the bushing and the internal surface of the distal end cap, as well as between the curved segment of the rotor and the internal surface of the casing. Since the eccentricity of the rotor is extended, enhanced vibration is obtained. In this first embodiment, the bushing is brazed to the distal end of the rotor and the casing is steel. The bushing is arcuate and is positioned in close proximity to the internal surface of the distal end cap along the curved segment and at its axial edge.

Abstract: A lightweight, portable concrete vibrator is provided. A vibrator head includes a hollow casing with an eccentric rotor having a curved segment along one side extending in an arc of 120.degree. so as to position the rotor centroid at the most favorable position to induce maximum vibration for aggregate distribution and filling of voids or air pockets in wet concrete. An inverted, V-shaped stiffening segment is formed on the opposite side of the rotor. The ratio of the centroid offset from the rotation axis to the diameter is in the range of 1:3.5-1:3.75. A tubular support assembly forms the handle for the motor. Preferably, the motor is a small, two cycle engine operating in the range of 5,000 to 7,000 rpms. A bearing sleeve may be provided adjacent the distal end of the vibrator head in order to accommodate any incidental lateral flexing of the rotor in the casing.

Abstract: A concrete striking equipment presented in the form of a framework mounted on a longitudinal bar operating in a vibratory relationship in a horizontal plane because of an off-center rotating weight defining a part of the powering means. While basically developed for striking concrete, the invention's field of utility extends to the leveling and/or grading of earth and rock.

Abstract: Concrete striking equipment presented in the form of a framework mounted longitudinal bar operating in a vibratory relationship in a horizontal plane because of an off-center rotating weight defining a part of the powering means. While basically developed for striking concrete, the invention's field of utility extends to the leveling and/or grading of earth, rock and the like. The aforesaid framework is physically similar to that of a commonly known WEED EATER apparatus, where an enhanced vibratory effect is resiliently achieved through a specialized mounting arrangement.