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US 4,574,423 AGranted
Rotary damper having a clutch spring and viscous fluid
AssigneeFuji Seiki Inc.
InventorsKenji Ito, Masanori Watanabe
Life of this patent
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Abstract
A rotary damper with a directional property is disclosed which is capable of being simplified in structure, manufactured with a low cost, and stably and precisely operated. The rotary damper is constructed in such a manner that a clutch spring is interposed between a revolving shaft and a rotor to selectively carry out the integral rotation of the rotor with the shaft or the stop of the rotor independent from the shaft.
Claims1
A rotary damper with a directional property, comprising:
- a housing having a bottom;
- a rotor rotatably received in said housing, said rotor having a circular recess formed on the upper surface thereof;
- a viscous liquid interposed between the bottom of said housing and the lower surface of said rotor to apply a viscous resistance to said rotor;
- a revolving shaft having a part thereof rotatably inserted in said recess of said rotor;
- clutch means in the form of a coil spring fitted on said part of said revolving shaft in a manner to be interposed between said rotor and said revolving shaft through said recess and form a frictional contact with said revolving shaft;
- a cutout formed in said part of said revolving shaft opposite to the upper end of said recess and having one end of said clutch spring securely supported therein;
- and
- friction means comprising a rubber ring interposed between and mutually engaging an annular recess formed at the lower portion of the outer periphery of said rotor and the bottom of said housing.
5 more elements
Dependencies are inferred from the claim text.