Patent ID: 8857066
Filing Date: 2014-10-14
Classification: B23D

Abstract:
1. A power saw comprising: an electric motor including a motor shaft; an impact assembly including (i) an input shaft coupled to said motor shaft, (ii) a hammer member movably positioned on said input shaft and including at least one hammer projection, (iii) an anvil member configured for rotation relative to said input shaft and including at least one anvil projection, and (iv) a biasing member configured to bias said hammer member toward said anvil member so that said at least one hammer projection is in a position of rotational engagement in a rotational direction with said at least one anvil projection; and a blade retaining assembly including (i) a blade shaft configured for rotation with said anvil member, and (ii) a blade coupling coupled to said blade shaft and configured to connect to a saw blade, wherein said impact assembly is configured for intermittent impacting in said rotational direction of said at least one hammer projection against said at least one anvil projection to generate torque pulses that tend to rotate said anvil member and said blade shaft in said rotational direction.