Wrench orifice with enhanced longitudinal friction
AssigneeProprietary Technologies, Inc.
InventorRichard J. Macor
Life of this patent
Estimating the term…
Abstract
A wrench tool is described which has an orifice with a driving end for turning fasteners. The orifice is substantially cylindrical and comprises an array of longitudinal, engaging surfaces positioned therein forming a symmetrical pattern around an imaginary central axis. At least three of the longitudinal engaging surfaces each have at least a small region thereon roughened, and the roughened, internal engaging surfaces form a pattern around the imaginary central axis. And, each roughened region is formed so as to enhance longitudinal friction between the wrench tool and the fasteners. In some preferred embodiments, there is a predetermined total number of longitudinal engaging surfaces, and the total number of longitudinal engaging surfaces is divisible by six using whole numbers.
Claims20
A wrench tool having an orifice with a driving end for turning fasteners, said orifice comprising means to reduce tilting of a fastener therein while being torqued, said orifice being substantially cylindrical and comprising an array of longitudinal engaging surfaces positioned therein forming a symmetrical pattern around an imaginary central axis;
- said means to reduce tilting comprising at least three of said longitudinal engaging surfaces each having at least a small region thereon roughened, said roughened, internal engaging surfaces forming a pattern around said imaginary central axis, and further whereas, each said roughened region being formed so as to enhance the longitudinal, coefficient of friction between said wrench tool and said fasteners.
A wrench tool having an orifice with a driving end for turning fasteners, said orifice comprising means to reduce tilting of a fastener therein while being torqued, said orifice being substantially cylindrical and comprising an array of at least six longitudinal engaging surfaces positioned therein forming a symmetrical pattern around an imaginary central axis;
- said means to reduce tilting comprising at least six of said longitudinal engaging surfaces each having at least a small region thereon roughened, said roughened, internal engaging surfaces forming a symmetrical pattern around said imaginary central axis, and further whereas, each said roughened region being formed so as to enhance the longitudinal, coefficient of friction between said wrench tool and said fasteners.
A wrench tool having an orifice with a driving end for turning fasteners, said orifice comprising means to reduce tilting of a fastener therein while being torqued, said orifice being substantially cylindrical and comprising a predetermined total number of longitudinal engaging surfaces positioned therein forming a symmetrical pattern around an imaginary central axis, said total number of longitudinal engaging surfaces being divisible by six in whole numbers;
- said means to reduce tilting comprising all of said longitudinal engaging surfaces each having at least a small region thereon roughened, said roughened regions of said longitudinal engaging surfaces substantially forming a band inside said orifice and around said imaginary central axis, said band being positioned proximate a driving end of said orifice, and further whereas, each said roughened region being formed so as to enhance the longitudinal, coefficient of friction between said wrench tool and said fasteners.
Dependencies are inferred from the claim text.