Ratchet wrench with a bushing
OwnerYi-Fu Cheninventor
Life of this patent
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Abstract
A ratchet wrench includes a wrench head, a ratchet assembly and a bushing. The wrench head is made of metal and defines a cavity therein. The ratchet assembly is disposed in the cavity of the wrench head and has an outer configuration corresponding in shape to a periphery of the cavity of wrench head and being slightly smaller than the cavity of the wrench head. The bushing is made of a metal with a hardness greater than that of the wrench head and is fitted in a clearance defined between the ratchet assembly and an inner wall of the cavity of the wrench head. Moreover, the bushing has a substantially consistent thickness so that the bushing has an outer periphery and an inner periphery both corresponding in shape to the periphery of the cavity.
Claims4
A ratchet wrench comprising:
- a wrench head made of metal and defining a cavity therein;
- a ratchet assembly disposed in the cavity of the wrench head, having an outer configuration corresponding in shape to a periphery of the cavity of wrench head and being slightly smaller than the cavity of the wrench head;
- and
- a bushing made of a metal with a hardness greater than that of the wrench head, being fitted in a clearance defined between the ratchet assembly and an inner wall of the cavity of the wrench head, and having a substantially consistent thickness so that the bushing has an outer periphery and an inner periphery both corresponding in shape to the periphery of the cavity.
Dependencies are inferred from the claim text.