Abstract: A mobile robot having a removable wheel-drive assembly, comprising a mobile base having a chassis and a first wheel well member with a flange. There is a removable wheel drive assembly with a mounting bracket. There is a motor drive unit disposed on the mounting bracket and a wheel/tire connected to the motor drive unit via an axle. There is a second wheel well member on the mounting bracket and positioned between the motor drive unit and the wheel. The second wheel well member includes a central section having an aperture through which the axle passes and a top surface. The top surface of the central section of the second wheel well member engages with the flange of the first wheel well member of the mobile base.

Abstract: A clamping and cutting device that has a blade and blade receptacle aspect of the cutting mechanism with open clamping mechanisms that are actuated in a step-wise fashion due to a mechanical timing mechanism.

Abstract: A chain tool can be used to assemble or disassemble links on a chain, in particular a bicycle chain. The chain tool can be shaped and sized to be received within a component of a bicycle. For example, the chain tool can be received into a steerer tube at the head tube of the bicycle. The chain tool can also serve as a part of a headset, such as being a top cap of the headset.

Abstract: A chain tool can be used to assemble or disassemble links on a chain, in particular a bicycle chain. The chain tool can be shaped and sized to be received within a component of a bicycle. For example, the chain tool can be received into a steerer tube at the head tube of the bicycle. The chain tool can also serve as a part of a headset, such as being a top cap of the headset.

Abstract: A door assembly that includes a door that is operable to alternatively expose and cover an opening in the bezel of a computer. The door assembly includes a carriage that slides up and down that pivotally couples to the door. Upon pressing against the lower portion of the door, the door pivots and the carriage and the door automatically slide down such that the door no longer covers the opening in the bezel. When an upward force is applied to the door, the door and the carriage move upward and into the closed position. As the door reaches the opening in the bezel, a spring forces the door against the bezel and into the closed position. The door is easily opened and closed and the door is out of the way when the door is in the open position.