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US 10,603,767 B2Granted
Positive stop ratchet mechanism
AssigneeMatco Tools Corporation
InventorJeff Mitcheltree
Life of this patent
Estimating the term…
Abstract
Examples of the present disclosure relate to ratchets and include ratchets having a positive stop ratchet mechanism which controls the movement of a pawl and/or pusher with various geometric configurations and using various materials.
Claims19
A ratchet wrench comprising:
- a head portion having a back side and a front side with a head cavity formed therein wherein the head cavity includes a gear cavity, a pawl cavity, and a lever bore;
- a gear having gear teeth and a drive body, the gear rotatably engaged within the gear cavity wherein the drive body extends outwardly from the front side of the head portion for engaging and rotating a workpiece;
- a pawl having pawl teeth which is moveably engaged within the pawl cavity wherein the pawl teeth are positioned to engage and disengage the gear teeth;
- an actuator for biasing a face of the pawl opposite the pawl teeth where the actuator engages a lever body of a lever within the lever bore and the lever body is moveable from at least a first position to a second position by a lever handle that is perpendicular to a longitudinal axis of the lever body and is offset from a ratchet handle;
- and
- the lever body having a first register surface and a second register surface rotatable within the lever bore about the longitudinal axis of the lever body from a first position to a second position where the first register surface contacts a first sidewall of the lever bore in the first position as the second register surface is separated from the second sidewall and where the second register surface contacts a second sidewall of the lever bore in the second position as the first register surface is separated from the first sidewall and the first sidewall and the second sidewall are parallel in a direction extending a length of the head cavity bisecting the gear cavity, the pawl cavity, and the lever bore.
3 more elements
A lever bore, the lever bore comprising:
- a first sidewall and a second sidewall that are parallel in a direction perpendicular to a longitudinal axis of a lever for contacting a first register surface and a second register surface of a lever body where a lever handle of the lever is perpendicular to the longitudinal axis and is offset from a ratchet handle and where the first and second register surfaces are rotatable within the lever bore about the longitudinal axis of the lever body as the lever body is moved from a first position to a second position where the first register surface contacts a first sidewall of the lever bore in the first position as the second register surface is separated from the second sidewall and where the second register surface contacts a second sidewall of the lever bore in the second position as the first register surface is separated from the first sidewall.
A head portion of a ratchet wrench, the head portion comprising:
- a head cavity having a gear cavity, a pawl cavity, and a lever bore;
- the lever bore having a first sidewall and a second sidewall that are parallel in a direction extending a length of the head cavity bisecting the gear cavity, the pawl cavity, and the lever bore for contacting one or more register surfaces of a lever body of a lever where the one or more register surfaces are rotatable about the longitudinal axis of the lever body as the lever body is moved from a first position to a second position where only one of the one or more register surfaces contacts only one of the first sidewall or the second sidewall in the first position or in the second position and where a lever handle is perpendicular to the longitudinal axis of the lever body and is offset from a ratchet handle.
Dependencies are inferred from the claim text.