Handheld impact power tool

A carrier block for use in removably retaining a tool tip on a tool used in hand-working operations, the carrier block defining a central longitudinal axis, first and second opposed axial ends, and an outer surface having a first predetermined diameter adapted for receipt within a tool recess defined by the tool, the carrier block comprising;

• an annular flange adjacent the first end of the block and having a second diameter larger than the first diameter for defining a stop, the flange being defined by a circumferential step formed on the outer surface of the block;
• an axial recess formed in the first end of the block and extending in a direction parallel to the axis of the block, the recess being adapted to receive a tool tip;
• a transverse opening located between the circumferential step and the first end of the block, and extending between the axial recess and a region exterior of the block;
• a tip holding means received in the transverse opening for retaining the tool tip in the axial recess;
• an annular groove intermediate the circumferential step and the second end of the block, the groove defining a third diameter smaller than the first diameter;
• and
• a retaining means for retaining the block on the tool, the retaining means including an o-ring formed of a material that is resilient relative to the block, the o-ring being received in the annular groove of the block and having an outer diameter greater than the first diameter and less than the second diameter so that the o-ring provides a friction fit with the tool to retain the block in the tool recess.

An impact tool for use in hand-working operations comprising:

• a tool having a longitudinal axis and first and second axial ends, and including a tool recess extending axially inward from the first axial end in a direction substantially parallel with the longitudinal axis;
• a carrier block defining a central axis, first and second axial ends, and an outer surface sized for receipt within the tool recess, and including
• an annular flange adjacent the first end of the block, the flange being defined by a circumferential step formed on the outer surface of the block,
• an axial recess formed in the first end of the block and extending in a direction parallel to the axis of the block, the block recess being adapted to receive a tool tip,
• a transverse opening located between the circumferential step and the first end of the block, and extending between the block recess and a region exterior of the block, and
• an annular groove intermediate the circumferential step and the second end of the block, the groove defining a third diameter smaller than the first diameter;
• a tip holding means received in the transverse opening for retaining the tool tip in the axial recess;
• a retaining means for retaining the block on the tool, the retaining means including an o-ring formed of a material that is resilient relative to the block, the o-ring being received in the annular groove of the block and having an outer diameter greater than the first diameter and less than the second diameter so that the o-ring provides a friction fit with the tool to retain the block in the tool recess;
• and
• rotation preventing means for preventing rotation of the tool carrier block relative to the force transmitting member when the carrier block is retained in the tool recess.