Fastener guidance and retention tip member
AssigneeOlin Corporation
InventorFrederick J. Harris
Life of this patent
Estimating the term…
Abstract
A guidance and retention member, for use with a nail-like fastener of the type adapted to be driven by a powder-actuated tool, comprising an axially elongate, hollow, cylindrical body adapted for telescopic retention on the nose of the fastener and of an even number of flexible, radially extending fins, wherein alternating ones of the fins are of substantially greater radial extent than the fins adjacent thereto. The shorter fins, although nominally of the same thickness as the longer ones, are more rigid by virtue of their lower length-to-thickness ratio and act to limit pre-firing eccentricity of the fastener relative to the tool.
Claims10
In a guidance and retention member for use with a nail-like fastener of the type adapted to be driven by a powder-actuated tool, said member consisting of an axially elongate, hollow, cylindrical body portion, adapted for telescopic retention on at least the forward or nose portion of the fastener, and a plurality of flexible, axially elongate fin members integrally formed on the outer cylindrical surface of said body portion and extending radially thereof at regular circumferential intervals, the improvement comprising:
- said plurality being an even integer not less than six, with alternating ones of said fin members being of substantially greater radial extent than the fin members adjacent thereto.
A guidance and retention member for use with a nail-like fastener of the type adapted to be driven by a powder-actuated tool, said member comprising an axially elongated, hollow, cylindrical body portion adapted for telescopic retention on the forward or nose end of the fastener, and first and second fin portions, said fin portions consisting of at least three flexible, axially elongate fin members integrally formed on the outer cylindrical surface of said body member and extending radially thereof, said fin members being disposed in regular circumferential intervals, said fin members of said first fin portion alternating with those of said second fin portion and being of substantially greater radial extent than those of said second fin portion, the number of said fins in said first fin portion being equal to said number in said second fin portion.
Dependencies are inferred from the claim text.