Patent ID: 6009776
Filing Date: 2000-01-04
Classification: B25B

Abstract:
A right angle ratchet wrench drive unit comprising, in combination:a ratchet wrench having a head and an elongated handle, the head including a generally rectangular shaped ratchet shaft extending therefrom;a socket formed in a cylindrical configuration with a first end including a rectangular bore and a second end including a hexagonal bore;a drive unit formed in a generally cylindrical configuration and contoured in a generally L-shaped orientation, the drive unit having a first end and a second end, first and second recesses being formed in a generally cylindrical orientation and being positioned within each respective end, each recess having an inboard portion and an outboard portion, the first and second recesses each having an axis positioned at a ninety degree angle with respect to each other, the second recess having an internal cylindrical recess extending coaxially inwardly of its inboard end, the internal cylindrical recess having a pair of diametrically opposed spring-biased detents therein;first and second gear assemblies positioned within the first and second recesses respectively, the first and second gear assemblies thus being at a ninety degree angle with respect to one another, each gear assembly comprising a bevel gear, a central shaft, a bearing member and a retaining member, each central shaft being formed in a generally cylindrical configuration with an outer end, the outer end of the central shaft of the second gear assembly having a shoulder portion disposed thereon, the shoulder portion having a gear post extending coaxially therefrom, each bevel gear having an inboard end, an outboard end, an outer wall including a plurality of teeth and an axial aperture, the diameter of the outboard end of each bevel gear being greater than that of the inboard end with a gradually decreasing diameter therebetween, the outer wall being angled at about forty five degrees with respect to the inboard and outboard ends, the bevel gear of the second gear assembly being positioned around the gear post, the bevel gears being received within the respective first and second recesses with the gear post being positioned within the internal cylindrical recess and engaged by the spring-biased detents, each bearing being formed in a generally cylindrical configuration including an axial aperture positioned around the outer end of the central shaft flush with the shoulder portion, each retaining member including an axial aperture and peripheral coupling means, each retaining member being coupled within the outer portion of a recess to secure the gear assemblies in place, in a fully assembled orientation the teeth of the bevel gears being positioned in a meshing relationship with respect to each other, the respective axes of the bevel gears being positioned at ninety degree angles with respect to each other; anda drive shaft being coupled to the outer end of the central shaft of the second gear assembly, the drive shaft being detachably coupled within the socket, an adapter with a first end having a rectangular bore for receiving the ratchet shaft and a second end having a rectangular bore for being detachably coupled to the outer end of the central shaft of the first gear assembly, the adapter having a horizontal bore therethrough aligning with a horizontal bore through the central shaft of the first gear assembly, a pin extending through the aligned horizontal bores to facilitate secure coupling of the adapter to the first gear assembly, in an operative orientation a user positioning the ratchet shaft within the rectangular bore of the adapter and turning the wrench, this action causing rotation of the bevel gears and rectangular drive shaft, wherein the adapter has a tapered portion formed in an end thereof.