Hand held rotary tool with adapter for quick connection to accessories

A rotary power tool assembly including a hand-held rotary power tool and an adaptor that is connected to the tool and configured to connect an accessory to the tool,

• the tool comprising:
• a housing that includes a collar disposed at one end of the housing, the collar being fixed relative to the housing;
• and
• a motor disposed inside the housing, the motor including an output shaft that extends through an opening in the collar so as to protrude from the housing, the output shaft being rotatable relative to the collar,
• the adaptor comprising
• a driver that is connected to the output shaft in such a way as to rotate in concert with the output shaft, an outer surface of the driver having a first geometric feature;
• and
• a receiver that includes a connector, a torque transfer device and an output device, wherein
• the connector comprises a through opening that is concentric with an axis of rotation of the output shaft, and the connector is configured to engage with the collar in such a way that the receiver is detachably connected to the housing,
• the torque transfer device is configured to receive the driver, an inner surface of the torque transfer device including a second geometric feature that is configured to engage with the first geometric feature in such a way that rotation of the driver results in rotation the torque transfer device relative to the connector, and the torque transfer device comprises:
• a cup portion including a base and a sidewall that protrudes from a first side of the base toward the housing, an inner surface of the sidewall comprising the second geometric feature, and
• a drive shaft that protrudes from a second side of the base, the second side of the base being opposed to the first side of the base, the drive shaft being connected to the output device in such a way that rotation of the torque transfer device results in movement of the output device, and
• the output device is supported by the connector and is driven by the torque transfer device to move relative to the connector.