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US 5,060,331 AGranted
Method of producing wing nuts
AssigneeLuchu Shinyee Works Co., Ltd.
InventorTsai-Fu Shie
Life of this patent
Estimating the term…
Abstract
An improved method to produce wing nut. The wing nuts being produced through a sequence of operations comprising cutting, trimming, upsetting, bending, extrusion, drilling, wing forming and tapping.
Claims2
An improved method of manufacturing wing nuts, comprising:
- a. precisely cutting a predetermined length of raw material;
- b. evenly trimming opposing ends of said cut length of said raw material;
- c. a first upsetting step for flattening a center portion of said cut length;
- d. a second upsetting step for forming said flattened portion into a substantially cylindrical contour having a pair of opposing end surfaces;
- e. a bending step for displacing opposing ends of said cut length in a direction substantially othoginal a plane defined by either of said pair of opposing end surfaces;
- f. a first forging step for further shaping said center portion and forming an indentation of a predetermined depth in each of said pair of opposing end surfaces;
- g. a second forging step for increasing said depth of said indentations;
- h. forming a through opening extending between said indentations formed in said pair of opposing end surfaces;
- i. pressing said displaced opposing ends of said cut length to form wing members of said wing nuts in a press machine;
- and,
- j. tapping said through opening.
8 more elements
Dependencies are inferred from the claim text.