Device for braking the movement of a door, drawer or similar...

Details Device for braking the movement of a door, drawer or similar... Device for braking the movement of a door, drawer or similar...

2007-03-01

2011-10-25

Williams, Thomas J (Department: 3657)

Brakes

Internal-resistance motion retarder

Using a rotary-type fluid damper

C188S290000, C188S083000

Reexamination Certificate

active

08042660

ABSTRACT:
A rotary damper comprises a casing fixable to a structure and which comprises a wall which surrounds a chamber filled with a viscous fluid and has an inner surface facing the chamber. A cover is mounted and welded on a shoulder surface of the wall of the casing in such a way as to close the chamber in a sealed manner. A rotor which is mounted rotatably on the casing and comprises a disc portion, adapted to rotate within the chamber, and has a shaft portion extending axially from the disc portion and emerging through the cover so as to be operationally associable with a movable member. The cover has peripherally a collar-like protuberance, extending along the entire perimeter of the cover and coupled to the inner surface of the wall of the casing in such a way as to oppose the infiltration of the viscous fluid between the collar-like protuberance and the inner surface of the wall.

REFERENCES:
patent: 4527675 (1985-07-01), Omata et al.
patent: 4638528 (1987-01-01), Omata
patent: 4830151 (1989-05-01), Numata
patent: 5449054 (1995-09-01), Wiese et al.
patent: 2005/0045439 (2005-03-01), Nishiyama
patent: 89 10 118 (1989-11-01), None
patent: 2 253 891 (1992-09-01), None
patent: 2 286 869 (1995-08-01), None
patent: 58099539 (1983-06-01), None

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