Patent ID: 8342059

Claim:
A ratchet wrench comprising, in combination: a head including first and second sides spaced along an axis, with the head further including a compartment having a peripheral wall and extending from the first side through the second side of the head, with the head further including a pawl groove defined in the peripheral wall of the compartment; a handle interconnected to the head; a drive member including an engaging portion rotatably received in the compartment about the axis, with the drive member further including a driving portion adapted to drive an object, with the engaging portion of the drive member including an outer periphery having a plurality of teeth, with the outer periphery of the engaging portion of the drive member further including a dust groove, with the dust groove including first and second faces spaced along the axis, with the second face having a spacing to the first side of the head along the axis larger than the first face, with the dust groove further including a third face extending between the first and second faces, with first and second gaps defined between the head and the engaging portion of the drive member, with the dust groove intermediate the first and second gaps along the axis and in communication with the plurality of teeth of the drive member via the second gap; a pawl slideably received in the pawl groove and including a plurality of teeth for engagement with the plurality of teeth of the drive member; and a dustproof seal made of an elastic material and including a ring and a wing extending from the ring, with the ring including first and second surfaces spaced along the axis, the ring further including outer and inner peripheries spaced in a radial direction perpendicular to the axis and extending between the first and second surfaces, with a diameter of the outer periphery of the ring in a natural state in the radial direction being larger than a diameter of the peripheral wall of the compartment in the radial direction, with the wing extending from one of the first and second surfaces of the ring, with a height of the wing in a natural state measured from the other of the first and second surfaces of the ring along the axis being larger than a height of the ring between the first and second surfaces of the ring and larger than a spacing between the first and second faces of the dust groove along the axis, with the dustproof seal compressed and received in the dust groove, with the outer periphery of the ring pressing against the peripheral wall of the compartment, with the wing pressing against one of the first and second faces of the dust groove, with the other of the first and second surfaces of the ring pressing against the other one of the first and second faces of the dust groove, with the inner periphery of the ring and the wing not in contact with the third face of the dust groove, with communication between the first and second gaps being blocked by the seal.