Fastening system allowing component removal after fastener system failure
First Claim
Patent Images
1. A fastening system for attaching a cover to an underground vault comprising:
- a bolt having threads; and
a composite fiber reinforced polymer nut having an unthreaded thread engagement portion extending through at least a portion of the nut, wherein the unthreaded thread engagement portion forms thread after receiving the bolt and fails in shear before the nut and bolt seizewherein the nut further includes an unthreaded cylindrical bolt alignment portion positioned above the thread engagement portion, andwherein the nut further includes an unthreaded cylindrical bolt shroud section positioned below the thread engagement portion, both the unthreaded bolt alignment portion and the unthreaded bolt shroud section having a diameter greater than a diameter of the unthreaded thread engagement portion and the unthreaded bolt shroud section has an opening below the bolt.
2 Assignments
0 Petitions
Accused Products
Abstract
A fastening system for attaching a cover to an underground vault having a bolt with threads and a composite fiber reinforced polymer nut having a thread engagement portion extending through the nut which will fail in shear after the bolt is inserted before the nut and bolt seize. The fastening system can also include a nut retainer sized to allow the nut to float within the retainer.
-
Citations
17 Claims
-
1. A fastening system for attaching a cover to an underground vault comprising:
-
a bolt having threads; and a composite fiber reinforced polymer nut having an unthreaded thread engagement portion extending through at least a portion of the nut, wherein the unthreaded thread engagement portion forms thread after receiving the bolt and fails in shear before the nut and bolt seize wherein the nut further includes an unthreaded cylindrical bolt alignment portion positioned above the thread engagement portion, and wherein the nut further includes an unthreaded cylindrical bolt shroud section positioned below the thread engagement portion, both the unthreaded bolt alignment portion and the unthreaded bolt shroud section having a diameter greater than a diameter of the unthreaded thread engagement portion and the unthreaded bolt shroud section has an opening below the bolt. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A fastening system for attaching a lid to an underground box comprising:
-
a threaded bolt; and a fiber reinforced composite nut having an unthreaded thread engagement portion extending through at least a portion of the nut wherein threads are formed in the unearthed thread engagement portion upon receipt of the bold and particulates trapped between the bolt and the thread engagement portion of the nut have a first portion pressed into the nut and a second portion crushed and driven out of the bottom of the nut, wherein the nut further includes an unthreaded cylindrical bolt alignment portion positioned above the thread engagement portion and an unthreaded cylindrical bolt shroud portion positioned below the thread engagement portion, both of the unthreaded bolt alignment portion and the bolt shroud portion having a diameter larger than a diameter of the unthreaded thread engagement portion and the second portion of particulates are driven out of the nut through an opening at the end of the unthreaded cylindrical bolt shroud portion. - View Dependent Claims (13, 14, 15, 16, 17)
-
Specification