Title:
ねじ頭部穴ドライブ及び対応するドライバ工具並びに穴パンチ
Document Type and Number:
Japanese Patent JP2010526260
Kind Code:
A
Abstract:
A fastener with a recess head wherein the drive head has four lobular recess channels. Each channel comprises a first wall, a second wall, a bottom surface and a recess sidewall. The first and second walls have portions opposing each other and a constant radius of curvature to form a continuously and smoothly forming wall of the channel. A torque producing driver tool is defined with cross sectional signature substantially complementary in size and shape of the recess of the drive head of the fastener for matable engagement. A recess punch for manufacturing the fastener is also defined and comprises a punch holder and a punch pin integral with the holder.
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Inventors:
Kalpaya, Balancingham
Application Number:
JP2010506142A
Publication Date:
July 29, 2010
Filing Date:
April 30, 2008
Export Citation:
Assignee:
Unisteel Technology International Limited
International Classes:
F16B23/00; B21J5/02; B21K1/46; B25B15/00
Domestic Patent References:
| JP2003013924A | 2003-01-15 | |||
| JP2008528910A | 2008-07-31 | |||
| JPH04132213U | 1992-12-07 | |||
| JPS58113614A | 1983-07-06 |
Foreign References:
| US2083092A | 1937-06-08 | |||
| WO2003100272A1 | 2003-12-04 |
Attorney, Agent or Firm:
Yuichi Yamada
Masakazu Noda
Ikeda adult
Masakazu Noda
Ikeda adult