Title:
HEAD STRUCTURE FOR FASTENER
Document Type and Number:
WIPO Patent Application WO/2016/060273
Kind Code:
A1
Abstract:
The present invention is a structure for the head of a male threaded object with a head and shaft. The head is provided with: an outer peripheral surface for which the external shape of a cross-section perpendicular to the axis line of the male threaded section is a polygonal shape, the number of apices being n; and a hole, which is recessed in the end face that is perpendicular to the axis line and for which the internal shape of a cross-section perpendicular to the axis line of the male threaded section is a polygonal shape, the number of apices being an integer multiple of n. Provided thereby is a head structure for a fastener with which, for example, a wrench and a bar wrench can be reliably used simultaneously.
Inventors:
MICHIWAKI HIROSHI (JP)
Application Number:
PCT/JP2015/079402
Publication Date:
April 21, 2016
Filing Date:
October 19, 2015
Export Citation:
Assignee:
NEJILAW INC (JP)
International Classes:
F16B23/00
Foreign References:
| JPS63198816U | 1988-12-21 | |||
| JPS5339831Y1 | 1978-09-27 | |||
| JPS55117614U | 1980-08-20 |
Attorney, Agent or Firm:
SAHARA Masashi et al. (JP)
Sawara Masafumi (JP)
Sawara Masafumi (JP)
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