Patent ID: 7721636
Filing Date: 2010-05-25
Classification: B26F,Y10T

Abstract:
1. A hole puncher comprising: a base having multiple cutter brackets being hollow, mounted on the base and corresponding respectively to the through holes and each cutter brackets having a guide hole defined through the cutter bracket and aligned with a corresponding through hole in the base; multiple cutters corresponding respectively to the cutter brackets, slidably mounted respectively through the guide holes and each cutter having multiple springs corresponding respectively to and mounted respectively in the cutter brackets, pressing respectively against the clasps and respectively biasing the cutters up from extending completely through the cutter brackets; a linkage connecting to the linkage bracket on the base and having two links being longitudinal, arranged at an interval and connecting pivotally to the linkage bracket, and each link having an activating member connecting pivotally to and located between the links of the linkage and having a handle connecting pivotally to the handle bracket on the base and selectively driving the driven ends of the links to pivot down and having