Chuck

Claim 2

In a core chuck comprising an interior member having a longitudinal axis and including a plurality of generally planar exterior surfaces each parallel to said axis, a plurality of rollers, each roller parallel to and in contact with one of said generally planar surfaces, a plurality of jaw members, each jaw member having an arcuate interior surface in contact with at least one of said rollers, and means for resiliently maintaining said jaw members in contact with said rollers, the improvement comprising the provision of jaw orientation means which limit the relative rotational movement, around said axis, between a jaw member and an underlying roller, said jaw orientation means comprising a lug secured to said jaw member and projecting inwardly from the inner surface of said jaw member.

Claim 3

A core chuck as claimed in claim 1 wherein said jaw orientation means comprise two such lugs, said lugs being longitudinally spaced.

Claim 4

A core chuck as claimed in claim 2 wherein said lugs are circumferentially aligned with each other with respect to said axis.

Claim 5

A core chuck as claimed in claim 1 wherein each said jaw member is in contact with at least two of said rollers, said jaw orientation means comprising a plurality of lugs projecting radially inwardly from the inside surface of said jaw member, said lugs being circumferentially spaced from each other with respect to said axis.

Claim 6

A core chuck as claimed in claim 4 wherein said plurality of lugs are substantially axially aligned with each other, said jaw orientation means further including a second like plurality of axially aligned lugs, each lug of said second plurality being circumferentially aligned with a lug of said first mentioned plurality, the lugs of said second plurality being longitudinally spaced from those of said first plurality.

Claim 7

A core chuck as claimed in claim 5 wherein there are exactly twice as many rollers as jaw members, each of said pluralities of lugs consistings of two lugs.

Claim 8

A core chuck as claimed in claim 2 wherein said lug projects inwardly from said jaw member at a predetermined longitudinal position on said jaw member, and said interior member has a recess in at least a portion of its surface, said recess being axially aligned with said lug.

Claim 9

A core chuck as claimed in claim 1 wherein said means for resiliently maintaining said jaw members in contact with said rollers comprise a circumferentially disposed groove in the outer surface of each of said jaw members, said grooves being axially aligned, one of said grooves being interrupted by a barrier, and a band spring disposed in said grooves, opposite ends of said band being disposed on opposite sides of said barrier.

Claim 10

A core chuck as claimed in claim 8 wherein said barrier is integral with the remainder of said jaw member.

Claim 11

A core chuck as claimed in claim 8 wherein each jaw member has a second longitudinally spaced groove cut in its outer surface, said second grooves being axially aligned, a barrier being provided in one of said second grooves, and a band spring being disposed in said second grooves with opposite ends lying on opposite sides of said barrier in said second groove.

Claim 12

In a core chuck comprising an interior member having a longitudinal axis and including a plurality of generally planar exterior surfaces each parallel to said axis, the exterior shape of said interior member in its axially central region in a cross-section taken perpendicular to said longitudinal axis being a regular polygon having at least six sides, a plurality of rollers, each roller parallel to and in contact with one of said generally planar surfaces, a plurality of jaw members, each jaw member having an arcuate interior surface, the number of jaw members being equal to or less than 1/2 the number of sides of said polygon, the interior surface of each said jaw member being in contact with at least two of said rollers, and means for resiliently maintaining said jaw members in contact with said rollers, the improvement comprising the provision of jaw orientation means for limiting the relative rotational movement, around said axis, between a jaw member and the underlying rollers, said jaw orientation means comprising first and second pairs of circumferentially spaced lugs projecting radially inwardly from said inner surface of said jaw member, each of the lugs of said second pair being aligned with a lug of said first pair, said second pair of lugs being longitudinally spaced from said first pair of lugs.

Claim 13

In a core chuck comprising an interior member having a longitudinal axis and including a plurality of generally planar exterior surfaces each parallel to said axis, the exterior shape of said interior member in its axially central region in a cross-section taken perpendicular to said longitudinal axis being a regular polygon having at least six sides, a plurality of rollers, each roller parallel to and in contact with one of said generally planar surfaces, a plurality of jaw members, each jaw member having an arcuate interior surface, the number of jaw members being equal to or less than 1/2 the number of sides of said polygon, the interior surface of each said jaw member being in contact with at least two of said rollers, and means for resiliently maintaining said jaw members in contact with said rollers, the improvement comprising the provision of jaw orientation means for limiting the relative rotational movement, around said axis, between a jaw member and the underlying rollers, said jaw orientation means comprising first and second pairs of circumferentially spaced lugs projecting radially inwardly from said inner surface of said jaw member, each of the lugs of said second pair being aligned with a lug of said first pair, said second pair of lugs being longitudinally spaced from said first pair of lugs.

Claim 14

In a core chuck comprising an interior member having a longitudinal axis and including a plurality of generally planar exterior surfaces each parallel to said axis, the exterior shape of said interior member in its axially central region in a cross-section taken perpendicular to said longitudinal axis being a regular polygon having at least six sides, a plurality of rollers, each roller parallel to and in contact with one of said generally planar surfaces, a plurality of jaw members, each jaw member having an arcuate interior surface, the number of jaw members being equal to or less than 1/2 the number of sides of said polygon, the interior surface of each said jaw member being in contact with at least two of said rollers, and means for resiliently maintaining said jaw members in contact with said rollers, the improvement comprising the provision of jaw orientation means for limiting the relative rotational movement, around said axis, between a jaw member and the underlying rollers, said jaw orientation means comprising a first pair of circumferentially spaced lugs projecting inwardly from said inner surface of said jaw member and a second pair of lugs projecting radially inwardly from said inner surface of said jaw member, each of the lugs of said second pair being aligned with a lug of said first pair, said second pair of lugs being longitudinally spaced from said first pair of lugs, said axially central region of said interior member confined to the longitudinal region between said first and second pairs of lugs, the cross-sectional shape of said interior member outside of said axially central region being circular and having a diameter of less than the diameter of a reference circle drawn tangent to the apexes of said regular polygon.

Claim 15

In a core chuck comprising an interior member having a longitudinal axis and including a plurality of generally planar exterior surfaces each parallel to said axis, the exterior shape of said interior member in its axially central region in a cross-section taken perpendicular to said longitudinal axis being a regular polygon having at least six sides, a plurality of rollers, each roller parallel to and in contact with one of said generally planar surfaces, a plurality of jaw members, each jaw member having an arcuate interior surface, the number of jaw members being equal to or less than 1/2 the number of sides of said polygon, the interior surface of each said jaw member being in contact with at least two of said rollers, and means for resiliently maintaining said jaw members in contact with said rollers, the improvement comprising the provision of jaw orientation means for limiting the relative rotational movement, around said axis, between a jaw member and the underlying rollers, said jaw orientation means comprising a first pair of circumferentially spaced lugs projecting inwardly from said inner surface of said jaw member and a second pair of lugs projecting radially inwardly from said inner surface of said jaw member, each of the lugs of said second pair being aligned with a lug of said first pair, said second pair of lugs being longitudinally spaced from said first pair of lugs, said axially central region of said interior member confined to the longitudinal region between said first and second pairs of lugs, the cross-sectional shape of said interior member outside of said axially central region being circular and having a diameter of less than the diameter of a reference circle drawn tangent to the apexes of said regular polygon.

Claim 16

A core chuck as claimed in claim 12 further including roller retaining means engagable with each said roller to maintain a predetermined circumferential spacing of said rollers and to limit the radial movement of each said roller.

Claim 17

A core chuck as claimed in claim 13 wherein said roller retaining means comprises a pair of rings, each ring disposed around a circular cross-section end portion of said interior member and including a plurality of circumferentially spaced recesses for receiving the end portion of each said roller in a said ring recess.

Claim 18

In a core chuck having a longitudinal axis and comprising a plurality of exterior, radially movable jaw members and interior means for applying to said jaw members a radially outward force in response to a relative rotation between said jaw members and said interior means, the improvement wherein said jaw members are movable circumferentially around said axis relative to said interior means and a lug is secured to one of said jaw members and projects inwardly therefrom and limits the circumferential movement of said one jaw member relative to said interior means.

Claim 19

In a core chuck having a longitudinal axis and comprising a plurality of exterior, radially movable jaw members and interior means for applying to said jaw members a radially outward force in response to a relative rotation between said jaw members and said interior means, the improvement wherein said jaw members are movable circumferentially around said axis relative to said interior means and a lug is secured to one of said jaw members and projects inwardly therefrom and limits the circumferential movement of said one jaw member relative to said interior means.