Title:
FEED AND REMOTE CONTROL DEVICE FOR NUMEROUS FLUID PRESSURE RECEIVERS SUCH AS ACTUATORS* FLUID MOTORS OR IMPACT MECHANISMS ARRANGED IN IDENTICAL MACHINE
Document Type and Number:
Japanese Patent JPS5620296
Kind Code:
A
Abstract:
A mining or excavating machine has a plurality of hydraulic receivers, such as hydraulic jacks or hydraulic motors, associated with a respective electrically operated valves 21 each controlling the supply of hydraulic fluid to and the return of the fluid from the corresponding hydraulic receiver. All the valves are connected to a common hydraulic fluid supply pipe 22 and a common return pipe 23. A common conductor 20 connected to all the valves conveys coded signals thereto. Each valve has a decoding circuit so that on receiving a particular signal designating actuation of the hydraulic receiver corresponding to that valve is operated to cause the desired actuation. The instructions for actuation of a particular hydraulic receiver can be converted to code in a remote control box 17 having a coder sending a coded electrical signal output by cable 18 to a receiver- analyser 19 connected to the conductor 20. Or the remote control can utilize a radio link in which a remote control box 24 having a coder emits coded radio signals picked up by a receiver 25 in which the signals are amplified and sent by cable to the receiver-analyser.
Inventors:
PERRAUD RAYMOND JEAN
Application Number:
JP8526480A
Publication Date:
February 25, 1981
Filing Date:
June 25, 1980
Export Citation:
Assignee:
SECOMA
International Classes:
E21B1/26; E21B1/00; E21B7/02; E21B15/04; F15B11/17; F15B21/08; (IPC1-7): E21C3/20; F15B11/16
Domestic Patent References:
| JPS499002A | 1974-01-26 | |||
| JP50127903B |