Patent ID: 8753048
Filing Date: 2014-06-17
Classification: B23B,Y10T

Abstract:
1. A hole saw configured for use with a rotary power tool, the hole saw comprising: a guide member including a first end portion, a second end portion, and a generally cylindrical portion between the first end portion and the second end portion that forms a ledge, the first end portion configured to couple the hole saw to the rotary power tool; a saw body including a collar and a circular cutting edge having a cutting edge diameter, the saw body coupled to the guide member at the generally cylindrical portion for rotation with the guide member by the collar; a pilot coupled to the guide member for movement relative to the guide member and the saw body in a direction from the second end portion of the guide member toward the first end portion of the guide member, the pilot including an outer guide surface having a diameter that increases in the direction from the second end portion of the guide member toward the first end portion of the guide member; and a biasing member that biases the pilot in the direction from the first end portion of the guide member toward the second end portion of the guide member; wherein the pilot is coupled to the guide member such that at least a portion of the outer guide surface extends past the circular cutting edge of the saw body in a direction from the first end portion of the guide member toward the second end portion of the guide member; wherein the pilot includes a recess concentric with the guide member, wherein the biasing member extends into the recess and contacts the pilot to bias the pilot in the direction from the first end portion of the guide member toward the second end portion of the guide member; wherein the biasing member contacts the ledge to bias the pilot in the direction from the first end portion of the guide member toward the second end portion of the guide member; and wherein the ledge has a diameter approximately equal to the generally cylindrical portion.