How much do patents impact an academic career? Patents are not normally considered as publications in scholarly journals, as they are not subject to peer-review. They are actually new ideas, but patenting does not guarantee the impact and importance (whether good or bad idea). However, academics tend to patent inventions and discoveries for the sake of possible commercial benefits.

I wonder if they have any considerable impact on academic career? e.g., promotion, getting academic jobs, and in a different context, impact on proposals for getting grants and research funds.
The answer will clearly vary by institution, and in particular by field (Your average English prof wouldn't be expected to hold any patents but a materials scientist might) but yes, it certainly can.  Patents and publications are measures of productivity and it would be silly not to note them.  It should be pointed out, however, that patents correlate to jobs closer to industry, so a particularly high rate might be indicative of someone not in academia.