Bore gauge centralizer
AssigneeFederal Products Corporation
InventorWilliam MacIndoe
Life of this patent
Estimating the term…
Abstract
A bore gauge centralizer comprising a frame having a pair of parallel legs connected by a cross piece. One end of the frame is pivotally mounted to the gauge head so that the legs are generally parallel to the longitudinal axis of the gauge and the ends of the legs pivot in unison away from the head. A spring biases the leg ends away from the head. A roller is rotatably attached to the each leg end. The roller is a truncated solid oval so that a single contact point is made with the bore wall regardless of the position of the frame.
Claims15
A bore gauge centralizer for use as a component of a bore gauge including an elongated body with a longitudinal axis and a head at one end, said head including a sensing contact, said bore gauge centralizer comprising:
- (a) a rigid frame having a pair of parallel arms and a cross piece extending between said arms;
- (b) a first end of each of said arms being pivotally attached to said head on a common pivoting axis that is perpendicular to said longitudinal axis, said arms extending generally parallel to said longitudinal axis and along opposite sides of said sensing contact;
- (c) a roller rotatably attached to a second end of each of said arms such that the axis of rotation of said roller is generally parallel to said longitudinal axis;
- and
- (d) biasing means for biasing said second end of said arms away from said head.
A bore gauge centralizer for use as a component of a bore gauge including an elongated body with a longitudinal axis and a head at one end, said head including a sensing contact, said bore gauge centralizer comprising:
- (a) a rigid frame having a pair of parallel arms and a cross piece extending between said arms;
- (b) a first end of each of said arms being pivotally attached to said head on a common pivoting axis that is perpendicular to said longitudinal axis, said arms extending generally parallel to said longitudinal axis and along opposite sides of said sensing contact;
- (c) a roller rotatably attached to a second end of each of said arms such that the axis of rotation of said roller is generally parallel to said longitudinal axis, said roller having a circumferential side and at least one end, said side being convex;
- and
- (d) a spring for biasing said second end of said arms away from said head.
A bore gauge centralizer for use as a component of a bore gauge including an elongated body with a longitudinal axis and a head at one end, said head including a sensing contact, said bore gauge centralizer comprising:
- (a) a rigid frame having a pair of parallel arms and a cross piece extending between said arms;
- (b) a first end of each of said arms being pivotally attached to said head on a common pivoting axis that is perpendicular to said longitudinal axis, said arms extending generally parallel to said longitudinal axis and along opposite sides of said sensing contact;
- (c) a roller cartridge including a roller attached to one end of an axle, said axle being rotatably mounted within an opening extending into said second end of said leg such that the axis of rotation of said roller is generally parallel to said longitudinal axis, said roller having a circumferential side and at least one end, said side being convex;
- and
- (d) a spring between said head and said cross piece for biasing said second end of said arms away from said head.
Dependencies are inferred from the claim text.