Dual amplitude vibration generator for compaction apparatus

Details Dual amplitude vibration generator for compaction apparatus Dual amplitude vibration generator for compaction apparatus

1987-10-21

1989-05-16

Massie, IV, Jerome W.

Road structure, process, or apparatus

Apparatus

Means to agitate material

74 87, E01C 1928

Patent

active

048305340

ABSTRACT:
Vibration is generated by the rotation of an eccentric weight attached to a rotor shaft. A relatively high or low amplitude of vibration is produced by varying the radial position of the eccentric weight relative to the centerline of the rotor shaft. A latch, responsive to the direction of rotation of the rotor shaft, and springs control the radial movement of the eccentric weight. Rotation of the rotor shaft in one direction will cause the eccentric weight to be restrained in close proximity to the shaft, producing relatively low vibration amplitude. Rotation in the opposite direction, will cause the eccentric weight to be released; permitting the eccentric weight to move radially from the rotor shaft under the influence of centrifugal force; producing a higher amplitude of vibration. Springs automatically return the eccentric weight to the low amplitude position when the rotor shaft slows.

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patent: 2657582 (1953-11-01), Conkling
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patent: 3892496 (1975-07-01), Lebrero Martinez
patent: 3896677 (1975-07-01), Larson
patent: 4033193 (1977-07-01), Brander
patent: 4515027 (1985-05-01), Baier et al.

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