Apparatus for opening and closing cover

Details Apparatus for opening and closing cover Apparatus for opening and closing cover

2007-05-08

2007-05-08

Lewis, Tisha (Department: 3681)

Machine element or mechanism

Gearing

Varying speed ratio

C074S66500G

Reexamination Certificate

active

10896661

ABSTRACT:
An activating device for a cover has: a shaft unit having a rotary shaft; an arm unit which is coupled to the cover and the rotary shaft; and an actuator which drives the rotary shaft. The actuator has: a motor having a first output portion; a first reducer having an input portion and an output portion; and a second reducer having an input portion and an output portion. The reciprocal of a reduction ratio of the second reducer is larger than a quotient which is obtained by dividing a product by a torque that is required for rotating the output portion when a torque is not applied to the input portion, the product being obtained by multiplying a difference between a maximum torque that is applied to the output portion when the cover is opened, and a torque that is required for rotating the output portion when a torque is not applied to the input portion, with a ratio of a torque that is a remainder of a torque applied to the output portion after subjecting to a mechanical loss due to the second reducer, to the torque applied to the output portion.

REFERENCES:
patent: 5587635 (1996-12-01), Watanabe et al.
patent: 5620387 (1997-04-01), Janiszewski
patent: 6413186 (2002-07-01), Hattori
patent: 7086978 (2006-08-01), Aikawa et al.
patent: 2001-021039 (2001-01-01), None

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