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US 5,123,169 AGranted
Foot sizing method
AssigneeFoot Image Technology, Inc.
InventorsJ. P. White, Margaret J. Kolb
Life of this patent
Estimating the term…
Abstract
A method for accurately sizing a foot 10 comprising the steps of deriving a length measurement from a foot centerline, calculating a width line between medial 40 and lateral 42 portions of foot 10 at the foot flexion points, determining an arch-line type, and comparing the angle of curvature of the medial edge and the lateral edge of foot 10 measured from a heel point 34 of foot 10. Calculations for heel width and foot volume are also provided.
Claims11
A method for sizing a foot comprising the steps of:
- a) axially measuring a length component of a foot along a length axis on a foot centerline extending between a heel point at the base of the heel and the middle of the tip of the second toe, the measurement extending from the heel point to an intersection with a foot width line;
- b) calculating a foot width line extending between the widest part of the foot at the first metatarsal head region and the widest part of the foot at the fifth metatarsal head region;
- c) determining a lateral curvature angle by measuring the angle between the foot centerline at the heel point and a line extending from the heel point to the widest part of the foot at the fifth metatarsal head region at the foot width line;
- d) determining a medial curvature angle by measuring the angle between the foot centerline at the heel point and a line extending from the heel point to the widest point of the foot at the first metatarsal head region at the foot width line;
- and
- e) comparing the size of the lateral curvature angle with the size of the medial curvature angle.
3 more elements
A method for accurately sizing a foot utilizing a plurality of rapidly determinable foot scaler values comprising the steps of:
- a) measuring a foot length scaler value at the distance from a foot heel point to an intersecting foot width line, said foot length scaler value being measured along a straight line extending between said foot heel point, the center of mass of said heel, and the center point of the distal tip of the second toe;
- and said intersecting foot width line comprising a straight line extending substantially between the foot first metatarsal head region and the foot fifth metatarsal head region;
- b) calculating a foot heel width scaler value by determining the size of the straight line vector extending between the sides of the foot heel normally in contact with a surface being walked on;
- c) determining a lateral curvature angle by measuring, at the heel point, the angle formed by the straight line extending between said foot heel point and the second toe and a line extending from the heel point to the widest point of the foot at the fifth metatarsal head region;
- d) determining a medial curvature angle by measuring, at the heel point, the angle formed by the straight line extending between said foot heel point and the second toe and a line extending from the heel point to the widest point of the foot at the first metatarsal head region;
- and,
- e) ascertaining a foot curvature scaler value by comparing the size of the lateral curvature angle with the size of the medial curvature angle.
4 more elements
A method for sizing a foot comprising the steps of:
- a) axially measuring a length component of a foot along a length axis on a foot centerline aligned between a heel point at the base of the heel to the tip of the second toe, the measurement extending from the heel point to an intersection with a foot width line;
- b) calculating a foot width line extending between the widest part of the foot at the first metatarsal head region and the widest part of the foot at the fifth metatarsal head region;
- c) determining the specific arch-line type from a plurality of arch-line types;
- d) determining a lateral curvature angle by measuring the angle between the foot centerline at the heel point and a line extending from the heel point to the widest point of the foot at the fifth metatarsal head region at the foot width line;
- e) determining a medial curvature angle by measuring the angle between the foot centerline at the heel point and a line extending from the heel point to the widest point of the foot at the first metatarsal head region at the foot width line;
- and
- f) comparing the size of the lateral curvature angle with the size of the medial curvature angle.
4 more elements
A method for sizing a foot comprising the steps of:
- a) axially measuring a length component of a foot along a length axis aligned between a foot centerline extending from a heel point at the base of the heel to the tip of the second toe, the measurement extending from the heel point to an intersection with a foot width measurement line;
- b) calculating a foot width line within the foot metatarsal base flexion area extending between a flexion point at the widest lateral edge of the foot and proximate a flexion point at the widest medial edge of the foot;
- c) determining the specific arch-line type from a plurality of arch-line types;
- d) determining a lateral curvature angle by measuring the angle between the foot centerline at the heel point and a line extending from the heel point to the widest part of the foot at the lateral flexion point at the foot width line;
- e) determining a medial curvature angle by measuring the angle between the foot centerline at the heel point and a line extending from the heel point to the widest part of the foot at the medial flexion point at the foot width line;
- and
- f) comparing the size of the lateral curvature angle with the size of the medial curvature angle.
4 more elements
Dependencies are inferred from the claim text.