Tape measure
OwnerHuei-Yen Liaoinventor
Life of this patent
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Abstract
A tape measure includes a reel, a tape that is wound on the reel and that can be reeled out, and a hook attached to a free end of the tape. The tape includes a concave-convex shape when it is reeled out. The concave-convex shape includes a height and a width and provides rigidity for the standout length. The tape includes a flat shape when it is wound on the reel. The flat shape includes a flattened width. The maximum standout length is not larger than 100 times of the flattened width or the flatness is not larger than one fourth of the flattened width. Thus, the tape can easily be wound and flattened on the reel and will not be deformed because of change in stress when it is retroflexed or wound.
Claims31
A tape measure comprising a reel, a tape that is wound on the reel and can be reeled out, a hook attached to a free end of the tape, the tape comprising a concave-convex shape when it is reeled out, the concave-convex shape comprises a height and a width, and provides rigidity for the standout length, the tape comprising a flat shape when it is wound on the reel, the flat shape comprising a flattened width of 1 inch or larger, wherein the ratio of the height over width of the concave-convex shape is not larger than one fourth of the flattened width, and wherein the standout length is not larger than 100 times of the flattened width and within an error of 10%, wherein the tape can easily be wound and flattened on the reel, and will not be deformed because of change in stress when it is retroflexed and when it is wound.
A tape measure comprising a reel, a tape that is wound on the reel and can be reeled out, a hook attached to a free end of the tape, the tape comprising a concave-convex shape when it is reeled out, the concave-convex shape comprises a height and a width, and provides rigidity for the standout length, the tape comprising a flat shape when it is wound on the reel, the flat shape comprising a flattened width, wherein the ratio of the height over width of the concave-convex shape is not larger than one fourth of the flattened width so that the tape can easily be wound and flattened on the reel, and will not be deformed because of change in stress when it is retroflexed and when it is wound, and wherein the deformed concave-convex shape has an error between a center thereof and a center of the concave-convex shape not larger than 0.2 times of the width of the concave-convex shape.
Dependencies are inferred from the claim text.