Conveyors: power-driven – Conveyor section – Reciprocating conveying surface
Patent
1994-01-19
1995-11-21
Bidwell, James R.
Conveyors: power-driven
Conveyor section
Reciprocating conveying surface
91329, B65G 2500
Patent
active
054678595
ABSTRACT:
A vibrator for transporting articles has a base, a sliding carriage having an article-carrying surface, a piston arrangement with two expansion chambers in the base for vibrating the carriage, and a pneumatic valve assembly operated by the piston arrangement. Preferably, two pistons are oppositely aligned on a common axis and bear outwardly against the carriage. The pneumatic valve assembly includes a pair of spaced cam rods and a crossbar extending between the cam rods at their midpoints. The cam rods are parallel to the axis of the pistons, slide in unison with the carriage, and cooperatively push the crossbar between opposite extreme positions. The crossbar switches the air flow directions for the power and exhaust strokes of each piston. Air flow to or from one of the expansion chambers is throttled such that the carriage is moved more forcefully in one direction than in the other. Articles on the article-carrying surface are incrementally displaced in the direction opposite to the more forceful stroke.
REFERENCES:
patent: 4192419 (1980-03-01), Brodin
patent: 4505380 (1985-03-01), McLemore et al.
patent: 4593603 (1986-06-01), Johnson
patent: 5361706 (1994-11-01), Kunczynski
Bidwell James R.
Vibro Industries, Inc.
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