Device for buffering the closing impact of furniture doors

1. A device for buffering the closing impact of furniture doors, comprising:

a cylinder ( 10 ) having an oil chamber ( 11 ) formed therein;

a piston ( 20 ) reciprocally accommodated in the oil chamber ( 11 ) and having a piston rod projecting at one side thereof through an end wall of the cylinder ( 10 ), the piston rod being adapted to reciprocate in the oil chamber while passing through a sealing member ( 21 ) and a buffer member ( 22 );

a spring ( 30 ) accommodated in the oil chamber ( 11 ) and having a guide ( 31 ) mounted at a front end thereof;

a valve ( 40 ) including a body portion ( 45 ) and a protrusion element ( 50 ), the body portion being mounted around the piston rod ( 23 ) of the piston ( 20 ) in such a fashion that an oil gap ( 41 ) is defined between the outer peripheral surface of the body portion ( 45 ) and the inner peripheral surface of the cylinder ( 10 ) and having a recessed oil passageway ( 47 ) formed on an axial end surface thereof, and the protrusion element being integrally formed with a front end side of the body portion ( 45 ) and having a plurality of oil grooves ( 51 ) formed longitudinally on the outer periphery thereof; and

a check valve ( 60 ) mounted on the outer circumferential surface of the protrusion element ( 50 ) in such a fashion as to slidingly reciprocate along the compression direction of oil,

whereby when an external load is exerted to the piston ( 20 ), the check valve ( 60 ) moves along with the protrusion element ( 50 ) and simultaneously oil contained in the oil chamber ( 11 ) flows through the recessed oil passageway ( 47 ) of the valve ( 40 ) and the oil gap ( 41 ) via the oil grooves ( 51 ) defined between the protrusion element ( 50 ) and the check valve ( 60 ) to thereby absorb an impact generated during the closing of the furniture door.

2. A device for buffering the closing impact of furniture doors, comprising:

a cylinder ( 10 ) having an oil chamber ( 11 ) formed therein;

a piston ( 20 ) reciprocally accommodated in the oil chamber ( 11 ) and having a piston rod projecting at one side thereof through an end wall of the cylinder ( 10 ), the piston rod being adapted to reciprocate in the oil chamber while passing through a sealing member ( 21 ) and a buffer member ( 22 );

a spring ( 30 ) accommodated in the oil chamber ( 11 ) and having a guide ( 31 ) mounted at a front end thereof;

a valve ( 40 ) including a body portion ( 45 ) and a protrusion element ( 50 ), the body portion being mounted around the piston rod ( 23 ) of the piston ( 20 ) in such a fashion that an oil gap ( 41 ) is defined between the outer peripheral surface of the body portion ( 45 ) and the inner peripheral surface of the cylinder ( 10 ) and having a

recessed oil passageway ( 47 ) formed on an axial end surface thereof, and the protrusion element being integrally formed with a front end side of the body portion ( 45 ) and having a plurality of oil grooves ( 51 ) formed longitudinally on the outer periphery thereof; and

a check valve ( 60 ) and an auxiliary valve ( 70 ) juxtaposedly mounted on the outer circumferential surface of the protrusion element ( 50 ) in such a fashion as to slidingly reciprocate along the compression direction of oil,

whereby when an external load is exerted to the piston ( 20 ), the check valve ( 60 ) and the auxiliary valve ( 70 ) move along with the protrusion element ( 50 ) and simultaneously oil contained in the oil chamber ( 11 ) flows through the recessed oil passageway ( 47 ) of the valve ( 40 ) and the oil gap ( 41 ) via the oil grooves ( 51 ) defined between the protrusion element ( 50 ) and the check valve ( 60 )/the auxiliary valve ( 70 ) to thereby absorb an impact generated during the closing of the furniture door.

3. A device for buffering the closing impact of furniture doors, comprising:

a cylinder ( 10 ) having an oil chamber ( 11 ) formed therein;

a piston ( 20 ) reciprocally accommodated in the oil chamber ( 11 ) and having a piston rod projecting at one side thereof through an end wall of the cylinder ( 10 ), the piston rod being adapted to reciprocate in the oil chamber while passing through a sealing member ( 21 ) and a buffer member ( 22 );

a spring ( 30 ) accommodated in the oil chamber ( 11 ) and having a guide ( 31 ) mounted at a front end thereof;

a valve ( 40 ) including a body portion ( 45 ) and a protrusion element ( 50 ), the body portion being mounted around the piston rod ( 23 ) of the piston ( 20 ) in such a fashion that an oil gap ( 41 ) is defined between the outer peripheral surface of the body portion ( 45 ) and the inner peripheral surface of the cylinder ( 10 ) and having a recessed oil passageway ( 47 ) formed on an axial end surface thereof, and the protrusion element being integrally formed with a front end side of the body portion ( 45 ) and having a plurality of oil grooves ( 51 ) formed longitudinally on the outer periphery thereof; and

a pair of check valves ( 60 ) mounted on the outer circumferential surface of the protrusion element ( 50 ) in such a fashion as to slidingly reciprocate along the compression direction of oil, and at least one auxiliary valve ( 70 ) interposed between the pair of check valves ( 60 ),

whereby when an external load is exerted to the piston ( 20 ), the check valves ( 60 ) and the auxiliary valve ( 70 ) move along with the protrusion element ( 50 ) and simultaneously oil contained in the oil chamber ( 11 ) flows through the recessed oil passageway ( 47 ) of the valve ( 40 ) and the oil gap ( 41 ) via the oil grooves ( 51 ) defined between the protrusion element ( 50 ) and the check valves ( 60 )/the auxiliary valve ( 70 ) to thereby absorb an impact generated during the closing of the furniture door.