Back to results
US 8,511,207 B2Granted
Rotation control device for a tool
OwnerCheng-Wei Suinventor
Life of this patent
Estimating the term…
Abstract
A rotation control device for a tool is disposed between a handle and a tool head and includes two ratchet wheels, a spring and two C-shaped snap rings. The two ratchet wheels are symmetrically arranged. When pressed, the respective ratchet wheels will be subjected to the same force and move the same distance, thus making the engagement between the ratchet wheels and the tool head more assured, while avoiding the stuck fault and improving the convenience in use.
Claims6
A rotation control device for a tool comprising:
- a handle with two first ratchet portions;
- a tool head pivotally connected to the handle and having a second ratchet portion;
- two identical ratchet wheels disposed between the handle and the tool head, wherein the two ratchet wheels are selectively adjusted between a close position where the two ratchet wheels are abutted against each other and a separated position where the two ratchet wheels are separated and located away from each other, wherein each of the ratchet wheels is provided with a ratchet portion on an outer periphery thereof, a receiving groove in an inner surface thereof, and a protrusive press portion on an outer surface thereof, wherein the ratchet portions of the two ratchet wheels are selectively engaged with the second ratchet portion of the tool head or simultaneously engaged with the first and second ratchet portions, wherein the press portion of each of the ratchet wheels is smaller in outer diameter than the ratchet portion of the respective ratchet wheels, wherein when in the close position, the ratchet portions are engaged with the second ratchet portion of the tool head with the handle and the tool head pivotable with respect to each other, and wherein when in the separated position, the ratchet portions of the ratchet wheels are engaged with the first and second ratchet portions simultaneously with the handle and the tool head fixed in a non-rotatable manner to each other;
- and
- a spring disposed between the two ratchet wheels and having two ends pressed against receiving grooves of the two ratchet wheels to maintain the two ratchet wheels in the separated position in normal conditions.
2 more elements
A rotation control device for a tool comprising:
- a handle with a first ratchet portion;
- a tool head pivotally connected to the handle and having two second ratchet portions;
- two identical ratchet wheels disposed between the handle and the tool head, wherein the two identical ratchet wheels are selectively adjusted between a close position where the two identical ratchet wheels abut against each other and a separated position where the two identical ratchet wheels are separated and located away from each other, wherein each of the two identical ratchet wheels is provided with a ratchet portion on an outer periphery thereof, a receiving groove in an inner surface thereof, and a protrusive press portion on an outer surface thereof, wherein the ratchet portions of the two identical ratchet wheels are selectively engaged with the first ratchet portion of the handle or simultaneously engaged with the first and second ratchet portions, wherein the press portion of each of the two identical ratchet wheels is smaller in outer diameter than the ratchet portion of the respective ratchet wheel, wherein when in the close position, the ratchet portions of the two identical ratchet wheels are engaged with the first ratchet portion of the handle, with the handle and the tool head pivotable with respect to each other, and wherein when in the separated position, the ratchet portions of the two identical ratchet wheels are engaged with the first and second ratchet portions simultaneously, with the handle and the tool head fixed in a non-rotatable manner to each other;
- and
- a spring disposed between the two identical ratchet wheels and having two ends pressed against receiving grooves of the two identical ratchet wheels to maintain the two identical ratchet wheels in the separated position in normal conditions.
2 more elements
Dependencies are inferred from the claim text.