Title:
TAPERED LOBULAR DRIVER AND FASTENER
Document Type and Number:
Japanese Patent JP2022037088
Kind Code:
A
Abstract:
To provide a torque transmission driver used to transmit torque to a fastener for assembly of a structure or device.SOLUTION: A fastener system includes a fastener and a driver 210, each of which has three alternating lobes 214 and troughs 216 that define drive surfaces. The three alternating lobes 214 and troughs 216 are each defined by an outer radius portion, a drive side transition, an inner transition radius, and a reverse drive portion. A fastener recess and the driver 210 each also have a side wall 230 defined by an outer transition radius that tapers at a taper angle relative to a rotational axis. The fastener side wall may taper at about 60°. The driver side wall 230 may taper at about 60°. Alternatively, the driver side wall 230 may taper at an angle at least 10° less than the taper angle of the recess side wall, such as 42°. The drive side transition 222 defines a drive angle which may be between 0° and 5°.SELECTED DRAWING: Figure 16
Inventors:
RICHARD W LUKES
DONALD K BLAESS
SEAN RISKIN
DONALD K BLAESS
SEAN RISKIN
Application Number:
JP2021201691A
Publication Date:
March 08, 2022
Filing Date:
December 13, 2021
Export Citation:
Assignee:
INFASTECH IP PTE LTD
International Classes:
B25B15/00; F16B23/00
Domestic Patent References:
| JP2010249321A | 2010-11-04 | |||
| JP4823692B2 | 2011-11-24 | |||
| JP4031418B2 | 2008-01-09 | |||
| JP2014524364A | 2014-09-22 |
Foreign References:
| US20090260489A1 | 2009-10-22 | |||
| US20110048181A1 | 2011-03-03 |
Attorney, Agent or Firm:
Longhua International Patent Service Corporation