Patent ID: 11931848
Assignee: ZIPPY ROBOTICS, INC.
Field: Machine tools (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 10:
11. A spindle assembly, comprising:
a friction drive wheel configured to be coupled to an output shaft of a motor, the friction drive wheel being configured and disposed to directly contact a shank of a bit;
a plurality of bearings configured to contact the shank of the bit; and
a bit clamp assembly including a clamp bearing having a central through-hole dimensioned to accept a lower portion of the shank of the bit, the bit clamp assembly being configured to hold the bit in contact with the plurality of bearings, and the bit clamp assembly being further configured to axially constrain the bit by trapping a ring extending outward from the shank of the bit, the ring being trapped between the clamp bearing and a surface of at least one of the plurality of bearings,
wherein the ring is a depth ring disposed on the shank of the bit, the depth ring being formed of a material selected from the group consisting of metal and plastic.