Patent ID: 9592591
Date: 2017-03-14
CPC Classifications: B25B

Claim:
1. An impact tool comprising: a ball-and-cam impact mechanism comprising a hammer and an anvil, the hammer being configured to rotate about a first axis and to translate along the first axis to impact the anvil to cause rotation of the anvil about the first axis; a motor including a rotor configured to rotate when a flow of compressed fluid is supplied to the rotor to drive rotation of the hammer of the ball-and-cam impact mechanism; and a speed controller coupled to the rotor and configured to throttle the flow of compressed fluid supplied to the rotor based on a rotational speed of the rotor; and an orifice through which the flow of compressed fluid passes, wherein the speed controller is configured to throttle the flow of compressed fluid supplied to the rotor by regulating a size of the orifice; wherein the speed controller comprises: wherein the size of the orifice is regulated by: wherein the predefined threshold speed is based on the group selected from at least one of characteristics of the spring and weight of the one or more masses.