Abstract: A suspension system for a motor of a combustion-powered hand tool includes a motor retaining ring defining a space for accepting the motor, an outer ring radially spaced from the retaining ring and configured for attachment to a cylinder head of a combustion chamber, and at least one resilient suspension element configured for dampening vibrations between a motor support and a tool frame, and having a plurality of resilient beams connecting the retaining ring and the outer ring.

Abstract: An adjustable depth of drive assembly for use with a fastener-driving tool includes a workpiece contact element having a contact end and an adjustment end, at least one stop configured for being secured to the tool and being normally moveable between an adjusting position in which the workpiece contact element is movable relative to the tool, and a locked position where the adjustment end is secured from movement relative to the tool, and at least one biasing element associated with the stop and configured for urging the stop and the adjustment end into a selected locked position relative to the tool without the use of tools.

Abstract: An adjustable depth of drive assembly for use with a fastener driving tool includes a workpiece contact element having a contact end and an adjustment end, a cage stop securable to the tool and being movable between an adjusting position in which the workpiece contact element is movable relative to the tool and a locked position wherein the adjustment end is secured to the tool, and a locking device associated with the cage stop and reciprocable between a locked position and an adjustment position for securing the cage stop and the adjustment end in a selected locked position relative to the tool without the use of tools. It is preferred that the adjustment end of the workpiece contact element has at least one toothed edge, and the cage stop has at least one toothed surface for engaging the at least one toothed edge in the locked position.