Gear speed reducer

Details Gear speed reducer Gear speed reducer

2007-10-16

2007-10-16

Hannon, Thomas R. (Department: 3682)

Machine element or mechanism

Gearing

Directly cooperating gears

C185S037000, C251S129120

Reexamination Certificate

active

11240328

ABSTRACT:
When a rotational shaft of a gear speed reducer is rotated, a small-diameter gear of a first gear is held in mesh with first internal teeth of a fixed gear and a large-diameter gear of the first gear is held in mesh with second internal teeth of a second gear. The first gear and the second gear comprise cycloidal gears, respectively, and transmit rotational drive power to the second gear. The rotational drive power is output from an output shaft of the second gear. The gear speed reducer has a default mechanism for holding the output shaft at a predetermined angular position when an electric signal applied to an actuator is interrupted, and a self-lock function for preventing drive power applied from the output shaft from being transmitted to the actuator.

REFERENCES:
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patent: 4896567 (1990-01-01), Zhou
patent: 5022369 (1991-06-01), Terazawa
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patent: 6640776 (2003-11-01), Torii
patent: 2003/0196640 (2003-10-01), Saito et al.
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patent: 2003-206762 (2003-07-01), None
patent: 2004-36629 (2004-02-01), None
patent: 2004-185824 (2004-07-01), None
Japanese Office Action for Application No. 2004-288233, dated Jul. 24, 2007.

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