ROTARY DAMPER

WIPO Patent Application WO/2000/034679

A1

A rotary damper for damping an impact by an upward opening door or a toilet seat by applying a braking force to it when it is closed, which develops a larger damping force than a conventional damper using a viscosity shear resistance when the door is closed, thus enabling the door to be opened with a light force, wherein there are provided an arc inelastic part (2e) ranging from one circular end edge (2c) to the other circular end edge (2d) of the tubular shaft part (2a) of a movable shaft (2) inserted rotatably into a casing (1) and an eccentric elastic part (2f) made in contact elastically with the inner peripheral surface (1a) of the casing (1) by bending it outwards from the one circular end edge (2c) to the other circular free end edge (2d) so that the eccentric amount becomes gradually larger than the radius of curvature of the inner peripheral surface (1a) of the casing (1), whereby, when the movable shaft (2) is closed in the arrow R1 direction by the rotation of the door, a frictional force against the inner peripheral surface (1a) of the eccentric elastic part (2f) becomes larger and, when the door is open in the arrow R2 direction, to the contrary, the frictional force can be reduced remarkably.

WO/2009/044910	HINGE DEVICE
JP3404002	STAY

BANDO RYOSUKE (JP)

PCT/JP1999/006674

June 15, 2000

November 30, 1999

Click for automatic bibliography generation  

SUGATSUNE KOGYO (JP)
BANDO RYOSUKE (JP)

E05F3/14; E05C17/64; E05F1/08; F16F7/04; F16F9/12; F16F; (IPC1-7): F16F7/04; F16F9/12

JPH058075U	1993-02-02
JPH06221358A	1994-08-09
JPH0653836U	1994-07-22
FR2643433A1	1990-08-24
FR1328493A	1963-05-31
JPS6281739U	1987-05-25
US5142738A	1992-09-01
JPS528768U	1977-01-21

Saito, Yoshio (Yurakucho 1-chome Chiyoda-ku Tokyo, JP)

View/Download PDF      PDF Help

Previous Patent: FRICTION CLUTCH

Next Patent: A PISTON OR PLUNGER AND A METHOD FOR MAKING THE SAME