Rotary damper with self-standing mechanism

Details Rotary damper with self-standing mechanism Rotary damper with self-standing mechanism

1995-12-27

1998-06-23

Graham, Matthew C.

Brakes

Wheel

One-way brakes

158 828, 158 8277, E05D 1100, E05D 1110, F16F 910, F16F 912

Patent

active

057691886

ABSTRACT:
A rotary damper for use with a toilet lid has a damper shaft rotatably supported by a damper housing, a collar of synthetic resin fitted over the damper shaft for rotation therewith, and a casing of synthetic resin fixed to the damper housing and disposed around the collar for rotation relative thereto. The collar has a pair of diametrically opposite axial ridges disposed on the outer circumferential surface thereof and projecting radially outwardly. The casing has a pair of diametrically opposite cantilevered resilient arms defined by respective slits in the circumferential wall thereof. The cantilevered resilient arms have respective axial teeth disposed on the inner circumferential surface of the casing and projecting radially inwardly for engagement with the axial ridges, respectively. When the collar rotates in one direction, respective slanting surfaces of the axial ridges engage and move over the respective axial teeth, displacing the axial teeth radially outwardly against the resiliency of the cantilevered resilient arms. After the axial ridges move past the respective axial teeth, respective step surfaces of the axial ridges are locked by the axial teeth, retaining the collar and hence the damper shaft in a rotated position unless strong forces are applied to rotate the damper shaft backward.

REFERENCES:
patent: 3017964 (1962-01-01), Thuengen
patent: 3523593 (1970-08-01), Karasick
patent: 3718212 (1973-02-01), Havranek
patent: 3811715 (1974-05-01), Brudy

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