Door hinge mechanism
OwnerChiyo Okabeinventor
Life of this patent
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Abstract
A door hinge device applicable to a door, comprising a pair of flanges, a cylinder connected to one of these flanges and housed with a pair of pistons, a valve means formed on one of the pistons, a partition mounted between the flanges, an orifice formed on the partition, and a driving mechanism mounted externally of the cylinder, wherein the antiflow valve means is opened when the flanges move in the direction to open the door, but when they move in reverse direction to close the door, the valve means of the piston controllably permits a desired quantity of working oil to flow therethrough.
Claims7
A door hinge mechanism comprising a pair of flanges each fixedly mounted on a door and a means for fixedly mounting said mechanism on said door, one of said flanges being connected to a cylinder while the other is connected to a supporting means in pivotally supported relation with respect to said cylinder, a pair of pistons mounted internally of said cylinder at a suitably spaced apart interval, a working oil filled in said pair of pistons, a movable means mounted externally of said pistons to move the latter in upward and downward directions along with the relatively opening and closing motions of said flanges, a partition mounted between said pistons, an orifice and a reversely stopping valve means formed on said partition, said valve means being adapted to be released when said flanges are moved in the opening direction thereof, a valve means formed on one of said pistons reciprocable through said orifice of the partition thereby to control the quantity of working oil to be fed through said orifice during the latter half process wherein said pair of pistons have moved in the closing direction of said flanges.
Dependencies are inferred from the claim text.