Core chuck
AssigneeDouble-E Inc.
InventorRichard Edward Flagg
Life of this patent
Estimating the term…
Abstract
A core chuck comprising radially movable exterior jaw members, means operative in response to a relative rotation between the jaw members and those means to apply a radially outward force to the jaw members, and biasing means for urging the jaw members toward a predetermined radial position. The biasing means comprise a band spring disposed in axially aligned recesses in surfaces of the jaw members, at least one of the recesses being provided with spring retainer means preventing removal of the spring from the recess in a radial direction.
Claims15
In a core chuck having a longitidinal axis and comprising radially movable exterior jaw members, means operative in response to a relative rotation between said jaw members and said means to apply a radially outward force to said jaw members, and biasing means for urging said jaw members toward a predetermined radial position, the improvement wherein:
- said jaw members define aligned recesses in one of the inner and outer surfaces thereof;
- said biasing means comprise a band spring engaging all of said jaw members and disposed in said aligned recesses;
- and,
- at least one of said recesses is provided with spring retainer means preventing removal of said spring from said one recess in a radial direction and permitting movement of said spring relative to said one recess in a circumferential direction, said spring retainer means comprising a stop projecting axially from a said side of said recess, and overlapping and being arranged to engage a radially-facing surface of said spring.
In a core chuck having a longitudinal axis and comprising radially movable exterior jaw members, means operative in response to a relative rotation between said jaw members and said means to apply a radially outward force to said jaw members, and biasing means for urging said jaw members toward a predetermined radial position, the improvement wherein:
- said jaw members define aligned recesses in one of the inner and outer surfaces thereof;
- said biasing means comprise a band spring engaging all of said jaw members and disposed in said aligned recesses;
- and,
- at least one of said recesses is provided with spring retainer means preventing removal of said spring from said one recess in a radial direction and permitting movement of said spring relative to said one recess in a circumferential direction, said spring retainer means comprising circumferentially-extending flanges projecting axially from opposite sides of said one recess and at least partially overlapping said band spring.
In a core chuck having a longitudinal axis and comprising radially movable exterior jaw members, means operative in response to a relative rotation between said jaw members and said means to apply a radially outward force to said jaw members, limiting means for limiting the maximum radially outward position of said jaw members and including structure secured against radial movement relative to said axis and defining a plurality of limiting surface portions each of which overlaps an opposed surface portion defined by a respective one of said jaw members, and biasing means for urging said jaw members toward a predetermined radial position, that improvement wherein:
- each of said opposed surface portions extends from adjacent a radially outward surface of said respective one of said jaw members towards said axis and is sloped with respect to said axis at a first predetermined acute angle;
- each of said limiting surface portions is generally parallel to a respective one of said opposed surface portions and is sloped with respect to said axis at second predetermined acute angle;
- and,
- said second acute predetermined angle is greater than said first acute predetermined angle.
Dependencies are inferred from the claim text.