Patent ID: 9371675
Filing Date: 2016-06-21
CPC Classification: E05D,E05F,E05Y,F16C,F16F,Y10T

Claim Text:
1. A rotary damper comprising: a damper body having a receiving portion; and a rotor rotatably disposed in the receiving portion of the damper body, wherein a space between an inner circumferential surface of the receiving portion and an outer circumferential surface of the rotor is divided into a plurality of pressure chambers, wherein the receiving portion and the rotor are opposed each other in a direction of a rotation axis of the rotor, the receiving portion and rotor having a gap formed between opposing surfaces of the receiving portion and rotor, the plurality of pressure chambers being communicated with each other by the gap, wherein in case where the rotor is rotated in one direction, pressure difference is generated in the plurality of pressure chambers so that fluid filled in the pressure chamber at high pressure flows into the pressure chamber at low pressure via the gap, wherein the damper body and the rotor are relatively movable in the direction of the rotation axis of the rotor, wherein the rotary damper further comprises a position adjustment mechanism that causes one of the damper body and the rotor to be moved in the direction of the rotation axis of the rotor, thereby adjusting a position of the one of the damper body and the rotor with respect to the other of the damper body and the rotor, and wherein size of the gap is adjusted by the position adjustment mechanism moving the one of the damper body and the rotor in the direction of the rotation axis of the rotor so that a rotation speed of the rotor is controlled.