Patent ID: 11911878
Assignee: nan
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A ratchet wrench comprising:
a wrench head comprising a housing having an outer sidewall and a housing aperture defined by an inner sidewall provided with a plurality of housing ramps;
a handle having a first end connected with said wrench head;
a clutch ring disposed in said housing aperture, said clutch ring having an outer surface and an inner surface that defines a clutch aperture, said outer surface of said clutch ring having a plurality of clutch transmission ramps and at least a portion of said inner surface of said clutch ring having a plurality of clutch teeth; and
a drive element disposed in said clutch ring, said drive element having an outer surface provided with a plurality of drive teeth and an inner surface defining a drive aperture provided with fastener engaging surfaces;
wherein rotation of said handle in a first direction causes said housing ramps to move along said clutch transmission ramps in said first direction to force said clutch ring to contract against said drive element to lock said housing, said clutch ring and said drive element together and rotation of said handle in a second direction opposite said first direction causes said housing ramps to move along said clutch transmission ramps in said second direction that is opposite said first direction along said clutch transmission ramps to allow said clutch ring to expand away from said drive element to release said lock so that said wrench head relative to said drive element.