High strength fasteners, drivers, and fastener systems
AssigneePhillips Screw Company
InventorsGary Dilling, Stefan Szczurek
Life of this patent
Estimating the term…
Abstract
Fasteners, drivers, and fastener systems constructed wherein example fasteners have driver engageable surfaces on or within a shank tip of the fastener. Example embodiments are included where at least one of the installation and removal surfaces are configured to define a segment of a spiral. Some example embodiments are also included where the installation and removal drive surfaces intersect an enlarged core diameter in an inner transitional surface that extends between the installation and removal surfaces of adjacent wings. Embodiments include fasteners with installation and removal drive surfaces on or within a shank tip of fasteners.
Claims45
A fastener system, comprising:
- a fastener having a head, a shank, and a recess, wherein the recess comprises driver engageable surfaces that define a plurality of wings radially extending from a central core;
- and
- a driver having an end constructed with mating surfaces for engagement with the driver engageable surfaces of the fastener recess, wherein the mating surfaces define a plurality of projections radially extending from a central core matching the wings;
- wherein each of said wings of the recess comprise a cross sectional shape comprising an installation surface, an outer transition surface, and a removal surface that define the wing, and wherein each of the wings are connected by an inner transition surface extending between the installation and removal surfaces of adjacent wings;
- wherein the cross sectional shape comprises a wing having a width and a height and the ratio of the wing height to the wing width is approximately equal to or less than 0.4;
- and
- wherein the driver engageable surfaces of the recess are constructed to receive the mating surfaces of the driver.
A fastener, comprising:
- a head, a shank, and a recess, wherein the recess comprises driver engageable surfaces that define a plurality of wings radially extending from a central core;
- and
- wherein each of said wings of the recess comprise a cross sectional shape comprising an installation surface, an outer transition surface, and a removal surface that define the wing, and wherein each of the wings are connected by an inner transition surface extending between the installation and removal surfaces of adjacent wings;
- wherein at least one of the installation and removal surfaces being configured to define a segment of a spiral;
- and
- wherein the driver engageable surfaces of the recess are constructed to receive mating surfaces of the driver;
- wherein the shank has a shank tip on an opposite end of the fastener from the head, and the recess is recessed in the shank tip.
A method of manufacturing a fastener having a head, a shank, and a shank tip on an opposite end of the fastener from the head, the method comprising:
- forming a starter hole;
- forming driver engageable surfaces that define a plurality of wings radially extending from a central core, wherein each of said wings of the recess comprise a cross sectional shape comprising an installation surface, an outer transition surface, and a removal surface that define the wing, and wherein each of the wings are connected by an inner transition surface extending between the installation and removal surfaces of adjacent wings;
- and,
- wherein at least one of the installation and removal surfaces is formed to define a segment of a spiral.
Dependencies are inferred from the claim text.