Patent ID: 9699973
Date: 2017-07-11
CPC Classifications: A01G,B23D

Claim:
1. A pneumatically powered pole saw, comprising: a fluid valve assembly having a generally hollow cylinder coupled to an axially aligned piston chamber of the pole saw, the cylinder defining an internal void extending from one side of the cylinder to another side of the cylinder, wherein the cylinder includes at least one fluid inlet path and at least one fluid outlet path; a shuttle arranged within the internal void of the cylinder, the shuttle being slidable between a first position and a second position around an axially located piston rod of the piston chamber, wherein a sealed chamber exists between a portion of the shuttle and the cylinder and when the shuttle is in the second position, the chamber is fluidly coupled to the fluid inlet path and the fluid outlet path to provide a controllable fluid flow into and out of the cylinder; a blade operatively coupled to the piston rod; and wherein the cylinder is coupled the piston chamber by a threaded engagement between the cylinder and the piston chamber.