Title:
BOLT AND PUBLIC TELEPHONE FIXED ON BASEPLATE OF TELEPHONE BOOTH BY USING THIS BOLT
Document Type and Number:
Japanese Patent JPH08135634
Kind Code:
A
Abstract:
PURPOSE: To make a bolt unremovable from the bolt head part side by arranging a bolt rotation preventive mechanism so far arranged in a bolt head part on the tip of a male screw bar of the bolt.
CONSTITUTION: A lower end surface of a male screw bar 3 suspending from an under surface of a disk-shaped or semispherical head part 2 having no groove or square hole to fit a jig, is opened, and a polygonal hole 4 to fit a bar-shaped square wrench is bored in a lower part of the male screw bar.
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| JP2007085412 | WOOD SCREW AND SCREWDRIVER |
| JP4519672 | Male and female screw mechanism and screwdriver |
Inventors:
TAKEMAE KUNITAKA
Application Number:
JP30138494A
Publication Date:
May 31, 1996
Filing Date:
November 09, 1994
Export Citation:
Assignee:
TAKEMAE KUNITAKA
International Classes:
F16B23/00; F16B35/00; F16B41/00; (IPC1-7): F16B23/00; F16B35/00; F16B41/00
Domestic Patent References:
| JPH0658221B2 | 1994-08-03 | |||
| JPH04203613A | 1992-07-24 |
Attorney, Agent or Firm:
Yoshio Imaoka