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• 15 United States
• 10 France
• 8 Japan
• 7 China
• 5 Korea
• 2 Other

Patent Owner(s)

Patent Owner	Address
ONES CO LTD	HIROSHIMA 739-0411

International Classification(s)

• B26D:CUTTING; DETAILS COMMON TO MACHINES FOR SEVERING, ....

• 2011 Application Filing Year
• B26D Class
• 386 Applications Filed
• 226 Patents Issued To-Date
• 58.55 % Issued To-Date

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
OISHI, Masatoshi	Hiroshima, JP	22	161
# of filed Patents : 22 Total Citations : 161

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Patent Citation Ranking

• 0 Citation Count
• B26D Class

• 0 % this patent is cited more than
• 14 Age

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge after expiration - Late payment is unavoidable	$700.00	$350.00	$175.00
Surcharge after expiration - Late payment is unintentional	$1,640.00	$820.00	$410.00

Full Text

US Patent Application No: 2011/0174,127

METHOD FOR PRESS PUNCHING A HOLE IN SHEET METAL AND PRESS DIE

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Abstract

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A punch unit for a press die for punching a hole in sheet metal includes: a piercing punch provided with a sharp projection; a plunger for pressing the piercing punch; a cylinder for supporting the piercing punch and the plunger slidably in a punching direction; and a coil spring for retracting the piercing punch and the plunger. Also disclosed are a press die for punching a hole in sheet metal and a punching method using the punch unit.

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Description

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Claims

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