Invention Application
- Patent Title: Punch and manufacturing method for recessed head fastener
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Application No.: US10437096Application Date: 2003-05-13
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Publication No.: US20040033838A1Publication Date: 2004-02-19
- Inventor: Barry J. Hughes , Michael L. Mowins
- Applicant: Phillips Screw Company
- Applicant Address: MA Wakefield
- Assignee: Phillips Screw Company
- Current Assignee: Phillips Screw Company
- Current Assignee Address: MA Wakefield
- Main IPC: B21K001/56
- IPC: B21K001/56

Abstract:
Recessed head fasteners are provided with a configuration by which the force applied by the blades of the driver to the recessed wings is applied at the radially outer regions of the wings. The wings of the fastener recess may be provided with torque pads at the outer regions of the wings adapted to engage the outer portions of the driver blades. The torque pads may be defined by relieved regions on the drive walls of the recess wings. The relieved regions are formed to avoid contact with the driver blades. Stabilizing ribs also may be defined at the radially inward regions of the drive walls. A recess engageable driver may include a plurality of radially extending ribs configured to promote engagement of the ribs with the most radially outward regions of the recess drive walls. The driver and the recess are compatible with each other as well as with otherwise corresponding conventional recesses and drivers that do not incorporate the invention. Also disclosed are punches and methods for making the disclosed fasteners.
Public/Granted literature
- US06786827B2 Punch and manufacturing method for recessed head fastener Public/Granted day:2004-09-07
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