Patents Assigned to Philips Screw Company, Inc.
  • Fastener with friction engageable surface
    Patent number: 7618327
    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.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: November 17, 2009
    Assignee: Philips Screw Company, Inc.
    Inventor: Gary Dilling
  • Spiral drive fastener with friction engageable surface
    Patent number: 7473182
    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.
    Type: Grant
    Filed: August 2, 2007
    Date of Patent: January 6, 2009
    Assignee: Philips Screw Company, Inc.
    Inventor: Gary Dilling