Patent ID: 9475164
Filing Date: 2016-10-25
CPC Classification: A47L,B23Q,Y02P

Claim Text:
1. A handheld power tool having a dust extractor, which comprises: a dust box for receiving dust; a tubular portion having an inner wall that defines a passage for guiding a flow of air into the dust box in a main flow direction; a spring wire secured to the inner wall at a first position and a second position, the second position being on an opposite side of the air flow passage from the first position, the spring wire including a first closing flap retaining portion at the first position, a second closing flap retaining portion at the second position, and a stop portion that extends across the air flow passage between the first position and the second position; a first closing flap pivotably retained on the first closing flap retaining portion, the first closing flap being pivotable in a direction toward the dust box from a closing position at which the first closing flap rests against the stop portion to an opening position at which the first closing flap is spaced apart from the stop portion; and a second closing flap pivotably retained on the second closing flap retaining portion, the second closing flap being pivotable in a direction toward the dust box from a closing position at which the second closing flap rests against the stop portion to an opening position at which the second closing flap is spaced apart from the stop portion, wherein the passage is opened when the first closing flap and the second closing flap are in the opening position and the passage is closed when the first closing flap and the second closing flap are in the closing position, and wherein movement of the first closing flap and the second closing flap beyond the closing position, in a direction opposite to the main flow direction, is prevented by the stop portion of the spring wire.