Material or article handling – Static receptacle and means for charging or discharging – or... – Nongravity discharging means
Patent
1983-05-03
1985-01-29
Spar, Robert J.
Material or article handling
Static receptacle and means for charging or discharging, or...
Nongravity discharging means
74128, 222 63, 414786, B65G 6500
Patent
active
044962720
ABSTRACT:
An unloading apparatus comprises a housing vertically spaced from the port in the bin containing the material to be unloaded, a shaft defining and rotatable about an upright axis generally at the port, at least one arm extending at least generally radially from the shaft and being sweepable through the material and over the port on rotation of the shaft, a toothed drive wheel centered on the axis and fixed on the shaft, and first and second pairs of actuators each having an outer end pivoted on the housing and an inner end constituted as a pusher engageable tangentially with the teeth of the wheel. These actuators are generally angularly equispaced around the axis and the actuators of the first pair alternate with those of the second pair. The first-pair actuators with their pushers in force-transmitting engagement with the wheel are extended while contracting the second-pair actuators and alternately therewith the first-pair actuators are contracted while extending the second-pair actuators with their pushers in force-transmitting engagement with the wheel, with the contraction stroke of each pair commencing after the start of and terminating before the end of the expansion stroke of the other pair. Thus before each alternation all of the actuators are in force-transmitting engagement with the wheel.
REFERENCES:
patent: 2947187 (1960-08-01), Graff et al.
patent: 3927774 (1975-12-01), Teske et al.
patent: 4083462 (1978-04-01), Teske et al.
Millman Stuart
Ross Karl F.
Spar Robert J.
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