| 摘要 |
REVERSIBLE RATCHETING TOOL WITH DUAL PAWLS A ratcheting tool (10), the ratcheting tool (10) comprising: a head (14) comprising a cavity (16, 18, 24); a gear ring (48) disposed in the head 914) rotatably about a vertical axis and defining a first plurality of teeth (52), the first plurality of teeth (52) defining at least one first arc; a first pawl (94a) disposed in the head (14) so that the first pawl (94a) is slidable laterally within the cavity (16) with respect to the vertical axis between a first position in which the first pawl (94a) is disposed between the head (14) and the gear ring (48) so that the head (14) transmits torque through the first pawl (94a) in a first rotational direction, and a second position in which the first pawl (94a) is disposed between the head (14) and the gear ring (48) so that the head (14) transmits torque through the first pawl (94a) in an opposite second rotational direction, the first pawl (94a) defining a front face and a rearward face extending between an upper surface and a lower surface of the first pawl (94a), and a second plurality of teeth (102) on the front face of the first pawl (94a) for engaging the first plurality of teeth (52), the second plurality of teeth (102) defining at least one second arc, wherein the rearward face of the first pawl (94a) is separated from the at least one first arc by a first offset in a direction perpendicular to the vertical axis; and a second pawl (94b) disposed in the head (14) above the first pawl (94a) in a direction parallel to the axis of the gear ring (48) and so that the second pawl (94b) is slidable laterally within the cavity (16, 18, 24) with respect to the vertical axis between a first position in which the second pawl (94b) is disposed between the head (14) and the gear ring (48) so that the head (14) transmits torque through the second pawl (94b) in the first rotational direction, and a second position in which the second pawl (94b) is disposed between the head (14) and the gear ring (48) so that the head (14) transmits torque through the second pawl (94b) in the opposite second rotational direction, the second pawl (94b) defining a front face and a rearward face extending between an upper surface and a lower surface of the second pawl (94b), and a third plurality of teeth (102) on the front face of the second pawl (94b) for engaging the first plurality of teeth (52), the third plurality (102) of teeth defining at least one third arc, wherein the rearward face of the second pawl (94b) is separated from the at least one third arc by a second offset in a direction perpendicular to the vertical axis, wherein one of the first offset and the second offset is less than the other of the first offset and the second offset. |
