Hydraulic index drive system

Details Hydraulic index drive system Hydraulic index drive system

1987-09-21

1989-04-18

Petrakes, John

Advancing material of indeterminate length

By orbitally traveling material-engaging surface

On endless belt or chain

60487, 60489, 226120, 226139, B65H 2010, F16H 2704, F16H 3904, F16H 3946

Patent

active

048219363

ABSTRACT:
An hydraulic index drive system including a variable displacement pump closely coupled to a fixed displacement motor through an adaptor which feeds oil to and returns oil from the motor. A lever on the pump controls the position of a swash plate which determines the pump displacement. The lever is positioned by a cam which makes one revolution per cycle. The cam is designed such that for 40% of the cycle there is no pump output which is the dwell portion of the cycle and for 60% of the cycle the output rises to a set maximum and returns to zero output which is the index portion of the cycle. The pump is driven by a variable speed motor. The system is particularly suited for use with a vacuum conveyor on a bag machine line for transfer of plastic bags to a bag folder.

REFERENCES:
patent: 2907230 (1959-10-01), Kollmann
patent: 3355166 (1967-11-01), Plumb
patent: 3425610 (1969-02-01), Stewart
patent: 3643434 (1972-02-01), Widmaier
patent: 3680312 (1972-08-01), Forster
patent: 4188859 (1980-02-01), Van Wagenen et al.
patent: 4192705 (1980-03-01), Wech

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