Patent ID: 8220166
Filing Date: 2012-07-17
Classification: B27B,Y10T

Abstract:
1. A chain-tightening device in combination with a guide bar of a chainsaw, said chain-tightening device comprising: an adjustable cam lever having an open position and a closed position; a cam having a hollow vertical opening; a first mounting screw connecting said cam lever to an elongated portion of said cam; a pivot pin inserted into said hollow vertical opening and having a hollow horizontal opening; a cam cup adjacent to said pivot pin and attached to said guide bar by an anchor bolt; a second mounting screw inserted into said hollow horizontal opening of said pivot pin; at least one spring in said cam cup; a cam follower adjacent to said at least one spring; a retaining ring adjacent to said cam follower; and wherein said spring applies pressure to said guide bar when said cam lever is in a first position.