US20140206488 is a publication of a pending patent application that has not issued yet. It may issue as a patent. It may not.
It's possible that a patent Examiner might find the claims lack novelty and/or are obvious in light of this prior art or other prior art. However, look to the claim of the patent application to determine what the applications are actually trying to patent. The patent claims define the metes and bounds of what is protected - not the specification or drawings.
Again, these claims are not issued, but at least give you a sense of what the applicants are going after. Claim 1 is reproduced below. (Keep in mind that these claims may change during examination and may be ultimately rejected by the Examiner.)
- A harmonic drive, comprising:
a first gear, fixed to the housing, the first gear having a first number of internal teeth;
a second gear, engaged with the first gear, the second gear having a second number of external teeth, wherein the second number is different from the first number;
an eccentric shaft, coupled to the second gear for driving the second gear to eccentrically rotate relative to the first gear; and
a power outputting unit, coupled to the second gear for converting eccentric rotation of the second gear to rotary power.