US2005215333A1PendingUtilityA1
Screw head punch
Individually held — no corporate assignee on recordPriority: Mar 24, 2004Filed: Mar 24, 2004Published: Sep 29, 2005
Est. expiryMar 24, 2024(expired)· nominal 20-yr term from priority
Inventors:Kuo Chang Lin
B21J 13/02B21K 1/463
36
PatentIndex Score
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Cited by
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References
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Claims
Abstract
An improved punch to punch socket on the head of a screw that extends the service life of the punch and upgrades the quality of the screw by having a recess formed on one end of the body of the punch, a punching head protruding from the center of the recess, and multiple wings are respectively extended from the sides of the punching head at a level lower than that of the head of the punch to create traces to release punching pressure to avoid deformed socket or formation of stress concentration point at the corner of the socket.
Claims
exact text as granted — not AI-modified1 . A punch for processing the socket on the surface of the head of a screw is comprised of a recess formed on one end of the body of the punch, a punching head protruding from the center of the recess; and multiple wings extending from the sides of the punching head at a level lower than that of the head of the punch.
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