Tool for operating on a three-dimensional surface

Apparatus for holding a tool to work a three-dimensional surface, said apparatus comprising:

• a first tubular member adapted to be carried by a spindle of a machine operable to move said spindle over a three-dimensional surface, said first tubular member comprising a first guide surface and a second guide surface;
• a second tubular member comprising a first guide surface engaging said first tubular member second guide surface and comprising a second guide surface engaging said first tubular member first guide surface;
• a first resilient member disposed to urge said second tubular member in a first axial direction relative to said first tubular member;
• a tool holder carried by said second tubular member and adapted to hold said tool such that said tool extends from said tool holder;
• and
• a second resilient member disposed to urge said tool holder into engagement with said second tubular member;
• said first tubular member and said second tubular member cooperating with said first resilient member to resiliently urge said tool holder in said first axial direction, said tool holder adapted to carry said tool into resilient engagement with said three-dimensional surface when said spindle is proximate to said three-dimensional surface.

A tool for depositing material onto a three-dimensional surface to mark trim lines for a cranial remodeling device, said tool comprising:

• a first tubular member adapted to be carried by a spindle of a machine operable to move said spindle over a three-dimensional surface, said first tubular member comprising a first guide surface and a second guide surface;
• a second tubular member comprising a first guide surface engaging said first tubular member second guide surface and comprising a second guide surface engaging said first tubular member first guide surface;
• a first resilient member disposed to urge said second tubular member in a first axial direction relative to said first tubular member;
• a material holder carried by said second tubular member and adapted to carry said material;
• and
• a second resilient member disposed to urge said material holder into engagement with said second tubular member;
• said first tubular member and said second tubular member cooperating with said first resilient member to urge said material holder in said first axial direction, said material holder adapted to carry said material into resilient engagement with said three-dimensional surface when said spindle is proximate said three-dimensional surface.