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A hydraulic buffer hinge for a door comprising a hydraulic buffer mechanism having a piston and a piston rod supported on a spring and received inside a hydraulic oil container to slowing down the return stroke of two swinging plates when the door, onto which the swinging plates are fastened, is clo

A hydraulic buffer hinge for a door comprising a hydraulic buffer mechanism having a piston and a piston rod supported on a spring and received inside a hydraulic oil container to slowing down the return stroke of two swinging plates when the door, onto which the swinging plates are fastened, is closed.

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A hydraulic buffer hinge for a door comprising a hollow cylindrical casing, a mounting plate welded to said cylindrical casing on the outside thereof, a hydraulic buffer connected to said cylindrical casing adjacent a bottom end thereof, a shaft inserted through said cylindrical casing, said shaft h

A hydraulic buffer hinge for a door comprising a hollow cylindrical casing, a mounting plate welded to said cylindrical casing on the outside thereof, a hydraulic buffer connected to said cylindrical casing adjacent a bottom end thereof, a shaft inserted through said cylindrical casing, said shaft having two square nuts at two opposite ends thereof, an upper bush, a spring tension adjusting ring and an upper cushion ring respectively received on said shaft and secured to said cylindrical casing at a top end thereof, a stop plate, a lower bush and a lower cushion ring respectively received on said shaft and secured to said cylindrical casing at the bottom end thereof, a compression spring sleeved on said shaft and received inside said cylindrical casing, said compression spring having a bottom end connected to said stop plate and a top end connected to said spring tension adjusting ring, an upper swinging plate and a lower swinging plate respectively connected to the two square nuts of said shaft by screws, a locating mechanism for maintaining the lower swinging plate at a location spaced from said mounting plate, wherein said upper and lower swinging plates are rotated on said cylindrical casing relative to said mounting plate as said door is opened or closed, and said stop plate engages the hydraulic buffer to form a hydraulic buffer mechanism for slowing down the moving speed of said upper and lower swinging plates during closing of the door.