Shock prevention apparatus for hydraulic/air-pressure equipment

Details Shock prevention apparatus for hydraulic/air-pressure equipment Shock prevention apparatus for hydraulic/air-pressure equipment

1994-10-20

1996-04-23

Zanelli, Michael

Boots, shoes, and leggings

36442407, G05B 704

Patent

active

055109870

ABSTRACT:
Disclosed is a shock prevention apparatus and method for hydraulic construction equipment such as excavators, loaders, dozers and cranes, which use hydraulic cylinders and motors as actuators. The shock prevention apparatus of the present invention low pass filters an original actuator driving command signal of the rectangular wave in accordance with displacement data of the piston stroke in the actuator, to generate a smooth actuator driving command signal, so that the shocks due to rapid opening and closing of the oil passages of the hydraulic actuator and the shocks at the stroke ends of the piston of the hydraulic actuator are prevented.

REFERENCES:
patent: 4509000 (1985-04-01), Ferguson
patent: 5320186 (1994-06-01), Strosser et al.
patent: 5359836 (1994-11-01), Zeuner et al.

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