Abrasion resistant boot
AssigneeUnited Technology Corporation
InventorFrank J. Brown
Life of this patent
Estimating the term…
Abstract
An abrasion resistant boot of non-metallic material particularly adaptable for use in protecting a pendant or a sling. The boot is attached to the eye of the pendant where it functions to absorb large compressive stresses which might otherwise sever the pendant. Unique failure characteristics of a key element to the boot assembly, comprising a woven Dacron insert, results in the failure of fibers of the insert which are oriented in the transverse direction but not those oriented in the longitudinal direction. This enables the initial impact forces to which the pendant and protective boot are subjected to be readily absorbed without failure of the fibers in the preferred orientation and further enables the sustained stresses to be distributed over the length of the insert.
Claims9
A protective boot for use in conjunction with a support member, said boot comprising a first member of relatively flexible material, a second member of relatively inflexible material attached to said first member, said second member being somewhat smaller in width than said first member and being of such configuration so as to form a pocket, and an insert of a size to substantially fill said pocket, said insert comprising a woven member exhibiting preferred characteristics when subjected to large compressive stresses whereby longitudinally oriented fibers of said woven member exhibit a relatively high resistivity to compression while the transversely oriented fibers exhibit a relatively low resistivity to compression so that when said boot is subjected to impact forces of substantial magnitude a failure of the transversely oriented fibers occurs without a corresponding failure of the longitudinally oriented fibers thereby permitting the impact forces to be distributed over the length of said insert.
A disposable boot for use in conjunction with a non-metallic support member, comprising a substantially rectangular flat section of woven nylon material, a cover comprising a fluffed nylon tube attached to said rectangular section of woven nylon material and forming a protective pocket which extends along said cover being substantially rectangular in shape and extending substantially the entire length of the diagonal connecting two non-adjacent corners of said substantially rectangular section of woven nylon material, each of the other two non-adjacent corners of said rectangular member of woven nylon material being bifurcated and provided with tie means to enable said disposable boot to be secured to a pendant to be protected, and a woven insert of Dacron material of substantially rectangular configuration and of a size designed to be readily accommodated within said protective pocket.
A non-metallic apparatus capable of absorbing the initial impact of highly compressive stresses and after being subjected to such stresses capable of distributing the sustained stresses over the effective length thereof, comprising a woven member, said woven member having longitudinally oriented fibers which exhibit a substantial resistivity to compression loads and transverse fibers which exhibit a relatively lesser resistivity to compression loads than do said longitudinally oriented fibers, said transversely oriented fibers being more readily disposed to failure when subject to substantial impact stresses while adjacent ones of said longitudinally oriented fibers exhibit a tendency to separate when subjected to said substantial stresses but do not fail.
Dependencies are inferred from the claim text.