Patent ID: 7987874

Claim:
Hose system for use in a hydraulic operation and/or control system, namely in high-pressure hydraulic systems present in environments that are highly sensitive with respect to spillage of hydraulic fluids in the event of a leak, comprising a working hose ( 11 ) for the transfer of hydraulic fluid having a pressure substantially higher than atmospheric pressure, wherein the working hose includes a hydraulic hose connected to an end coupling, and a safety hose ( 12 ) surrounding the working hose ( 11 ), wherein the safety hose includes a hydraulic hose connected to an end coupling the working hose ( 11 ) and the safety hose ( 12 ) being tightly joined at least at the ends of the two hoses, and including a pressure transmitter ( 29 ) for indicating a rise in pressure in the space ( 25 ) between the two hoses, and further comprising at least one bushing ( 13 ) adapted for releasable connection to the working hose ( 11 ) and the safety hose ( 12 ), the cross-section of the safety hose ( 12 ) allowing space for passing of the working hose ( 11 ), the bushing ( 13 ) including a space ( 24 ) communicating with the space ( 25 ) between the working hose ( 11 ) and the safety hose ( 12 ), and the space ( 24 ) in the bushing ( 13 ) communicating with a pressure transmitter ( 29 ) being able to signal an increase in pressure in the space ( 25 ) between the working hose ( 11 ) and the safety hose ( 12 ), wherein the bushing ( 13 ) for connection to the two hoses ( 11 , 12 ) includes two concentric threaded sleeves ( 21 , 22 ) adapted to connect the end couplings of the working hose ( 11 ) and safety hose ( 12 ), respectively, and in that at one of the hoses ends, axially inside of the threaded part of the outer threaded sleeve ( 22 ), an opening is arranged for the connection to a pressure transmitter ( 29 ).