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US 10,870,186 B2Granted
Dual pawl ratchet mechanism and reversing method
AssigneeSnap-on Incorporated
InventorDavid T. Ross
Life of this patent
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Abstract
A dual-pawl ratchet wrench mechanism is disclosed having a pawl carrier for selectively engaging a ratchet gear in first and second drive directions. The pawl carrier is operatively coupled to at least one pawl. The pawl carrier including at least one recess that at least partially houses the at least one pawl. The at least one pawl being rotatable about a central portion thereof within the recess when the pawl carrier is operated between the first and second drive directions.
Claims12
A reversible ratchet device comprising:
- a ratchet body having a cavity;
- a ratchet gear having a drive portion and a toothed portion, wherein the ratchet gear is rotatably disposed in the cavity, and wherein the drive portion projects outwardly from the cavity and is adapted to transmit torque to a work piece by operation of the device;
- and
- a pawl carrier disposed in the cavity and operatively coupled to first and second pawls that respectively have first and second pawl central portions, the first and second pawls are selectively engageable with the toothed portion for selecting one of either first and second drive directions, and the first and second pawls respectively rotate about the first and second pawl central portions while the pawl carrier is rotated to cause selection of one of the first and second drive directions, wherein the first drive direction is selected when the first pawl is engaged with the toothed portion and the second pawl is disengaged from the toothed portion, and the second drive direction is selected when the first pawl is disengaged from the toothed portion and the second pawl is engaged with the toothed portion.
1 more element
A reversible ratchet device comprising:
- a ratchet body having a cavity and a side with a first body opening communicating with the cavity;
- a reversing lever at least partially disposed in the cavity through the first body opening;
- a pawl carrier operably coupled with the reversing lever within the cavity and operatively coupled to a first pawl having a first pawl central portion and a second pawl having a second pawl central portion, wherein the first and second pawls respectively rotate about the first and second pawl central portions while the pawl carrier is operated by the reversing lever to select one of first and second drive directions;
- a ratchet gear having a toothed portion rotatably disposed in the cavity and a drive portion that projects outwardly from the cavity and that is engageable for transmitting torque by operation of the device;
- and
- a cover plate attachable to the side of the ratchet body for closing the cavity, the cover plate includes an aperture that is adapted to receive the drive portion projecting outwardly from the cavity,
- wherein the reversing lever is rotatable to selectively cause the first pawl to engage the toothed portion and the second pawl to disengage the toothed portion, thereby selecting the first drive direction, and the reversing lever is selectively rotatable to cause the first pawl to disengage the toothed portion and the second pawl to engage the toothed portion, thereby selecting the second drive direction.
4 more elements
Dependencies are inferred from the claim text.