Damper

Details Damper Damper

2007-04-12

2009-08-18

Burch, Melody M (Department: 3657)

Brakes

Internal-resistance motion retarder

Using a rotary-type fluid damper

C188S307000

Reexamination Certificate

active

07575108

ABSTRACT:
A damper includes a cylindrical housing, a rotor rotatably disposed in the housing and having a cylindrical shaft portion and a wing portion radially outwardly extending from the shaft portion, a control valve member disposed between the housing and the shaft portion to cover the wing portion, and a viscous fluid filled inside the housing. The wing portion has an asymmetric shape with respect to a rotational direction of the rotor relative to a straight line extending radially from the shaft portion. The wing portion includes a tip side surface, and a back end side surface. The control valve member includes a first inner surface facing a sloping surface parallel thereto, and a second inner surface facing a flat surface parallel thereto.

REFERENCES:
patent: 5152189 (1992-10-01), Miura et al.
patent: 5720370 (1998-02-01), Takahashi
patent: 7322450 (2008-01-01), Orita
patent: 2002/0179387 (2002-12-01), Orita
patent: 2003/0150678 (2003-08-01), Iwashita
patent: 2003/0234145 (2003-12-01), Iwashita
patent: 2006/0289257 (2006-12-01), Orita
patent: 22882109 (1999-02-01), None
patent: 3053156 (2000-04-01), None
patent: 3125416 (2000-11-01), None

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