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

Claim 0:
1. 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;
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
a housing enclosing the friction drive wheel and the plurality of bearings, the housing including a first magnet and a second magnet configured to magnetically couple with respective magnets disposed on a top surface of the bit clamp assembly,
wherein the first magnet and the second magnet are coupled to respective compression springs configured to apply an upward force to securely hold the bit clamp assembly.