Stud removing tool

Claim 2

In a stud, or nut, gripper tool of the type having at least one roller, or pin, co-acting with a lobular cam face to move radially for gripping a stud or nut, the combination comprising: an elongated, hollow tubular casing having an inner end and an outer end and having an inside elongated face with at least one axially extending lobe formed therein; at least one elongated, axially-extending, generally cylindrical roller, having an inner end and an outer end, in rolling contact with one of said lobes to move radially while moving circumferentially relative thereto; retaining means mouted within said casing in engagement with the inner ends of said rollers for maintaining said rollers in rolling contact with said lobular inner face; The outer ends of each said roller being free to roll and tilt, on the outer end of said lobular face, relative to the central longitudinal axis of said casing, when the outer ends of said rollers engage and tighten on a stud during turning of said casing on said axis.

Claim 3

A stud gripper tool as specified in claim 1 wherein: each said roller is cylindrical at the said outer end thereof but includes at least one recess in the said inner end thereof and said retaining means is a hollow cylindrical ferrule, or tube, having a projection thereon received loosely in said recess for preventing fall out while permitting roll and tilt thereof.

Claim 4

A stud gripper tool as specified in claim 1 wherein: each said roller is cylindrical from said inner end to said outer end and said retaining means includes an annular, resilient spring member for resiliently and yieldably urging each said roller outwardly against said inner lobular face.

Claim 5

A stud gripper tool as specified in claim 1 wherein: each said roller includes a projecting annular flange at the tip of the inner end thereof and said retaining means is an integral annular, inwardly-projecting portion of said casing, having at least one axially extending aperture receiving the inner end of said roller, said aperture being of less diameter than the diameter of said flange.

Claim 6

A combination as specified in claim 1 wherein: the outer ends of each said roller are exposed and the terminal tips thereof are flat, planar and generally coplanar with the outer edge of said casing whereby each roller is firmly backed throughout its gripping portion by said lobular cam face.

Claim 7

A combination as specified in claim 1 wherein: said casing includes one said lobe for one said roller and the remaining inside elongated face of said casing is provided with a plurality of spaced axially-extending flutes, ribs or teeth for receiving the corner edges of a stud or nut without slippage.

Claim 8

In a stud, or nut, gripper tool of the type having a plurality of rollers, or pins, each co-acting with a lobular cam face, the combination of: an elongated, hollow tubular casing having an inside elongated face with a plurality of axially extending lobes formed therearound; a plurality of elongated, axially extending cylindrical rollers, each having an inner end and an outer end and each in rolling contact with one of said lobes and spring means mounted within said casing in engagement with the inner ends of said rollers for resiliently and yieldably urging each said roller outwardly against said inner face each said roller being free to roll and tilt relative to the central longitudinal axis of said casing when the outer ends of said rollers tighten on a stud during turning of said casing.

Claim 9

In a stud, or nut, gripper tool of the type having a plurality of rollers, or pins, each co-acting with a lobular cam face, the combination of: an elongated, hollow tubular casing having an inside elongated face with a plurality of axially extending lobes formed therearound; a plurality of elongated, axially extending cylindrical rollers, each having an inner end and an outer end and each in rolling contact with one of said lobes and spring means mounted within said casing in engagement with the inner ends of said rollers for resiliently and yieldably urging each said roller outwardly against said inner face each said roller being free to roll and tilt relative to the central longitudinal axis of said casing when the outer ends of said rollers tighten on a stud during turning of said casing.

Claim 10

A stud gripper tool as specified in claim 7 wherein: each said cylindrical roller includes at least one enlarged flange extending circumferentially around the inner end thereof and said inner elOngated lobular face includes a groove extending circumferentially therearound for loosely receiving the flanges of said rollers to retain the same against fallout.

Claim 11

A stud gripper tool as specified in claim 7 wherein: each said roller includes a groove extending circumferentially around the inner end thereof and said inner elongated lobular face includes an inwardly projecting annular integral rib extending circumferentially therearound and received in the grooves of said rollers to prevent fallout thereof.

Claim 12

A stud gripper tool as specified in claim 7 wherein: each said roller includes a plurality of spaced, sharp edged annular ribs, or teeth, separated by circumferential grooves and said inner elongated lobular face includes at least one inwardly projecting annular, integral rib, opposite the inner ends of said rollers and received in one of the inner end grooves thereof for preventing fallout.

Claim 13

A stud gripper tool as specified in claim 7 wherein: said casing includes a hollow metal cylindrical tube, press fitted therein, opposite the inner ends of said rollers and centrally thereof for forming a housing for the upper end of a stud being gripped by said tool and said spring means is an annular, resilient, flexible element sleeved on the outside of said tube and urging said rollers outwardly.

Claim 14

A stud gripper tool as specified in claim 11 wherein: said annular flexible element includes an integral annular enlarged flange extending about the upper tips of said rollers to form a resilient seat therefor.

Claim 15

A stud gripper tool as specified in claim 12 wherein: said casing is generally cylindrical with a thin cylindrical wall, and said rollers are of relatively small diameter whereby said wall fits between closely spaced studs to encircle one said stud and said small diameter cylindrical rollers obtain a firm grip over a substantial vertical area of the exposed portion of said stud.

Claim 16

A stud, or nut, gripper tool comprising a hollow elongated casing having a thin cylindrical side wall, an open outer end for encircling a stud, or nut, to be gripped and a partially closed inner end, said inner end having exterior means for turning by a wrench; said thin cylindrical wall having an inner face formed with integral, axially extending spaced lobes, or cam faces, therearoud; a plurality of elongated, generally cylindrical rollers, each having an exposed outer end proximate, and substantially flush with, the outer end of said casing, and an inner end proximate the inner end of said casing, each said roller being adapted to roll along one of said lobes and a roller retaining means, mounted in the inner end of said casing and in contact with the inner ends of said rollers for loosely retaining said rollers in position; said rollers being otherwise free to roll and tilt relative to the central longitudinal axis of said casing when the exposed outer ends thereof are in gripping engagement with a stud.

Claim 17

A stud, or nut, gripper tool comprising a hollow elongated casing having a thin cylindrical side wall, an open outer end for encircling a stud, or nut, to be gripped and a partially closed inner end, said inner end having exterior means for turning by a wrench; said thin cylindrical wall having an inner face formed with integral, axially extending spaced lobes, or cam faces, therearoud; a plurality of elongated, generally cylindrical rollers, each having an exposed outer end proximate, and substantially flush with, the outer end of said casing, and an inner end proximate the inner end of said casing, each said roller being adapted to roll along one of said lobes and a roller retaining means, mounted in the inner end of said casing and in contact with the inner ends of said rollers for loosely retaining said rollers in position; said rollers being otherwise free to roll and tilt relative to the central longitudinal axis of said casing when the exposed outer ends thereof are in gripping engagement with a stud.

Claim 18

A stud gripper tool as specified in claim 14 wherein: said casing includes a hollow metal tube anchored in the inner end thereof and said retaining means is an annular rubber-like element mounted around said hollow metal tube.

Claim 19

A stud gripper tool is specified in claim 14 plus rib and groove means on said rollers and on said inner face for interengaging to prevent fallout of said rollers.

Claim 20

A stud gripper tool as specified in claim 14 wherein: said casing includes a hollow metal tube press fitted in the inner end thereof and said retaining means is loosely fitting, integral rib and groove means on said tube and on the inner ends of said rollers.