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Control For Hydraulic Drive

IP.com Disclosure Number: IPCOM000098498D
Original Publication Date: 1960-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 64K

Publishing Venue

IBM

Related People

Albosta, CA: AUTHOR

Abstract

Incremental motion with fluid controlled deceleration is achieved by pistons 10, 11 and 12 which are successively brought into engagement with toothed stepping wheel 13 fixed to output shaft 14.

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Control For Hydraulic Drive

Incremental motion with fluid controlled deceleration is achieved by pistons 10, 11 and 12 which are successively brought into engagement with toothed stepping wheel 13 fixed to output shaft 14.

At any given time only one of the pistons is driving wheel 13. Pistons 10, 11 and 12 are actuated by fluid under pressure controlled by magnetically operated spool valves 15, 16 and 17. Valves 15, 16 and 17 are successively actuated by magnets 18, 19 and 20 to admit fluid under pressure to the cylinders containing slidable pistons 10, 11 and 12. Each piston advances wheel 13 and then dwells so as to provide intermittent rotary motion. The speed of operation is dependent upon the rate at which valves 15, 16 and 17 are operated.

Fluid controlled deceleration is obtained through spring-biased damping pistons 21, 22 and 23 associated with and adapted to be engaged by pistons 10, 11 and 12. Pistons 21, 22 and 23 are urged to follow the associated drive pistons. The movement, however, is limited by stop pins 24. Hence, when piston 12 reaches the end of its driving stroke, it is out of engagement with associated piston 23. As piston 11 is driven by fluid under pressure, piston 12 is cammed out of the notch of wheel 13. After moving a given distance, piston 12 engages piston 23. At this time, fluid trapped behind the damping piston is forced to flow through orifices 25 and 26. A decelerating torque is therefore placed upon wheel 13. As piston 12 contin...