load of washed articles 60 as is the case with the conventional device fig1 the load of washed articles 60 would suddenly receive a high pressure and the air and water which the load 60 contains would produce a strong force which would tear it or make a circular hole or holes therein therefore the preliminary extraction of water as hereinabove described is very important for protecting the articles the supply of the hydraulic fluid 66 is continued to continue the application of pressure to the load 60 until the pressure reaches a predetermined maximum level if the predetermined maximum pressure is reached the pressure controller 61 transmits a signal to the servo valve 63 to actuate it to bypass the hydraulic fluid 66 to cause it to flow back into the reservoir 65 through the return line 64 so that an appropriate level of pressure may be maintained throughout the water extracting operation the pressure controller 61 can be set for actuation at different levels of maximum pressure which depend on the nature of the load of washed articles 60 the timer not shown is set for realizing a proper cycle of the water extracting operation upon expiration of the time set by the timer the hydraulic system 48 is switched to a different circuit which causes the piston rod 51 to rise to some extent to its intermediate position as shown in fig5 or to its uppermost position whereupon the membrane 53 is separated from the washing 60 the basket raising and lowering mechanism 46 is actuated to raise the basket 42 by the chain etc as shown in fig5 a limit switch or similar device not shown detects the.