초록 ▼

A one-way damper has a rotor which is provided with a braking disc at one of its ends. The braking disc is received in a housing of the damper and the housing is filled with oil. The other end of the rotor extends outward from the housing and has a gear loosely mounted thereon. The gear is engaged w

A one-way damper has a rotor which is provided with a braking disc at one of its ends. The braking disc is received in a housing of the damper and the housing is filled with oil. The other end of the rotor extends outward from the housing and has a gear loosely mounted thereon. The gear is engaged with a coil spring. When the gear rotates in one direction, the coil spring is reduced in diameter so that it grips the rotor, making it possible for the torque of the gear to be transmitted to the rotor through the coil spring. When the gear rotates in the other direction, the coil spring is expanded in diameter so that it does not grip the rotor, making it possible for the gear to turn freely. The one-way damper is used in association with a lid or door to damp one but not the other of the opening and closing operations.

대표청구항 ▼

A one-way type of a damper comprising: a housing provided with a sleeve-like base element and a bottom wall said bottom wall having a centrally disposed frustoconical upward projection thereon and an upwardly facing surface outwardly of said projection; a rotor which has an axle and a braking disc a

A one-way type of a damper comprising: a housing provided with a sleeve-like base element and a bottom wall said bottom wall having a centrally disposed frustoconical upward projection thereon and an upwardly facing surface outwardly of said projection; a rotor which has an axle and a braking disc at one end of said axle, the disc being contained in said housing together with a damping oil, the other end of the axle extending outward from said housing, and having a gear mounted thereon for rotation relative thereto, said axle at said one end having a recess receiving said projection for centralizing said axle, said one end of said axle having an annular portion below said disc and substantially engaging said upwardly facing surface, said axle having a boss extending above said disc; said housing including a cap with a central opening through which said axle extends, and a resilient diaphragm in said housing beneath said cap and substantially engaging said boss, said damping oil being disposed below said diaphragm on either side of said disc and in said recess; said gear having an axial bore therethrough and a counter-bore therein, and a coil spring into which said axle of said rotor is inserted, said spring fitting within said counter-bore and snugly embracing and engaging said axle, one end portion of said coil spring being fixed to said gear, the coil spring being reduced in diameter when said gear rotates in one direction and being expanded in diameter when said gear rotates in the other direction; whereby said gear transmits torque to said rotor through said coil spring when said gear rotates in said one direction but not when said gear rotates in said other direction.