Title:
摩擦係合可能な表面を有するらせんねじ締め留め具
Document Type and Number:
Japanese Patent JP4929160
Kind Code:
B2
Abstract:
Interference surfaces are constructed on inner transition surfaces between wings of a fastener having a spiral recess. A portion of the transition surface is tapered to provide the interference. A standard driver for a spiral recess will engage the interference surface to create a "stick fit" engagement. The punch is formed using a wire EDM operation to construct tapered surfaces within the die cavity of a hob. The hob is machined down to obtain the desired depth, which is measured up from a gage spot indicative of the sticking point.
More Like This:
| JP2015183560 | OIL FILTER |
Inventors:
Dilling Gary
Application Number:
JP2007508438A
Publication Date:
May 09, 2012
Filing Date:
April 12, 2005
Export Citation:
Assignee:
Philips Screw Company
International Classes:
F16B23/00; B21K5/20; B23P15/00
Domestic Patent References:
| JP2002525500A | 2002-08-13 | |||
| JPH06159339A | 1994-06-07 | |||
| JP2001137975A | 2001-05-22 |
Attorney, Agent or Firm:
Motohiko Fujimura