Oil hydraulic device for a dustbin lid

Abstract

An oil hydraulic device for a lid of a garbage can includes a pressure valve, a pushing valve, a hydraulic pipe, a reducing valve and a pedal. The pressure valve is connected to a container of the garbage can, and has a piston capable of moving forwards on the pedal's downward movement. The hydraulic pipe is connected to the pressure valve from a lower end, and the pushing valve from an upper end. The pushing valve is secured to an upper part of the container, and has a piston rod movable upwards to pivot a movable member on said garbage can to open said lid connected to said movable member. The reducing valve is connected to an intermediate portion of said pipe for absorbing a part of pressure of oil in said pipe on said pedal's downward movement.

What is claimed is:  
     
         1 . An oil hydraulic device for a lid of a garbage can, comprising 
 a force member having a pressure valve fixed to a lower part of an outer container part of said garbage can; said pressure valve having a cylinder part holding a piston capable of moving forwards on a pedal's downward movement to force oil contained in a hydraulic pipe connected to said pressure valve;    said hydraulic pipe being connected to a pushing valve coupled to an upper part of said outer container; said pushing valve having a cylinder part containing a piston having a piston rod on a top side of said piston; said cylinder part of said pushing valve being secured to said outer container by means of a fixing member with said piston rod of said pushing valve connected to a movable member pivoted to said fixing member;    said movable member being fixedly connected to said lid for permitting same to be pivoted on said fixing member to open on said pedal's downward movement to lift said piston rod connected to said movable member.    said hydraulic pipe being connected to a reducing valve on an intermediate portion thereof for permitting a part of pressure of said oil to be absorbed on said pedal's downward movement; said reducing valve having a piston fitted closely in a cylinder part.    
     
     
         2 . The oil hydraulic device for a lid of a garbage can as claimed in  claim 1 , wherein said fixing member has a pair of gaps on an inner side; a lower one of said gaps securing a top end of said hydraulic pipe therein; said piston rod of said pushing valve being movably passed through an tipper one of said gaps.  
     
     
         3 . The oil hydraulic device for a lid of a garbage can as claimed in  claim 1 , wherein an elastic member being connected to said movable member, and said fixing member from two ends for biasing said lid associated with said movable member downwards.  
     
     
         4 . The oil hydraulic device for a lid of a garbage can as claimed in  claim 1 , wherein a diameter of said cylinder part of said pressure valve is at least bigger than that of said cylinder part of said pushing valve, and a diameter of said cylinder part of said reducing valve is at least smaller than that of said pushing valve cylinder part.  
     
     
         5 . The oil hydraulic device for a lid of a garbage can as claimed in  claim 1 , wherein said piston of said reducing valve is biased by a spring against said oil on said pedal's downward movement; a regulating screw being fitted to said reducing valve for adjusting a position of said elastic member.  
     
     
         6 . The oil hydraulic device for a lid of a garbage can as claimed in  claim 1 , wherein said oil in said hydraulic pipe is able to be replaced with gas.  
     
     
         7 . The oil hydraulic device for a lid of a garbage can as claimed in  claim 1 , wherein said pedal is pivoted to said outer container with a pushing part on a bottom contacting a button of said pressure valve; said button projecting from said cylinder part of said pressure valve, and connecting said piston of said pressure valve.