Patent ID: 6095922
Filing Date: 2000-08-01
Classification: F16F,Y10T

Abstract:
A rotation damper for damping the rotational movement of a rotary member, comprising:a housing having a longitudinal axis and comprising an axially extending annular wall disposed around said longitudinal axis wherein said axially extending annular wall comprises an axially extending inner peripheral wall surface;a rotor rotatably disposed within and with respect to said housing about said axis and having an axially extending outer peripheral wall surface which is spaced from said axially extending inner peripheral wall surface of said housing so as to define therewith an axially extending annular gap;a viscous medium disposed within said axially extending annular gap for damping rotational movements of said rotor with respect to said housing;a shaft connected to said rotor and having at least one end projecting out from said housing for connection to a rotary member;a filler opening formed within a substantially axially central portion of said axially extending annular wall of said housing for permitting said viscous medium to be deposited within said axially extending annular gap formed between said axially extending outer peripheral wall surface of said rotor and said axially extending inner peripheral wall of said housing;seal means disposed at axial positions located upon opposite sides of said filler opening and operatively engaged with both said axially extending outer peripheral wall surface of said rotor and said axially extending inner peripheral wall surface of said housing for retaining said viscous medium within said axially extending annular gap defined between said axially extending outer peripheral wall surface of said rotor and said axially extending inner peripheral wall surface of said housing; andclosure means disposed within said filler opening for closing said filler opening and preventing leakage of said viscous medium out from said axially extending annular gap defined between said axially extending outer peripheral wall surface of said rotor and said axially extending inner peripheral wall surface of said housing.