Title:
LIGHTWEIGHT VAULT COVER
Document Type and Number:
WIPO Patent Application WO/2019/169301
Kind Code:
A8
Abstract:
Disclosed is a cover for a utility vault and a method for making such covers. The cover is formed from fiberglass reinforcement layers and a polymer mix matrix. The reinforcement layers include a bottom reinforcement layer, one or more edge reinforcement layers, and a top reinforcement layer. A first portion of the edge reinforcement layer overlaps a portion of the bottom reinforcement layer and a second portion of the edge reinforcement layer overlaps a portion of the top reinforcement layer. The reinforcement layers are formed from fiberglass fabric and may include fiberglass layers whose fibers are oriented quadraxially. The polymer mix impregnates the fabric layers and forms the bulk of the cover. The polymer matrix bonds the reinforcement layers so that forces applied across the top and bottom layers are communicated to the edge reinforcement layer. The polymer matrix includes a thermoset polymer resin and an expanded glass bead filler.
Inventors:
CHUDLEY KEITH (US)
FAGAN LEMUEL (US)
ESTES JASON (US)
ANGELO JEFFREY (US)
FAGAN LEMUEL (US)
ESTES JASON (US)
ANGELO JEFFREY (US)
Application Number:
PCT/US2019/020353
Publication Date:
May 14, 2020
Filing Date:
March 01, 2019
Export Citation:
Assignee:
HUBBELL INC (US)
International Classes:
E02D29/14; B29C45/00; B29C51/14; B65D55/02; B65D88/76; E05B65/00; H05K5/00; H05K5/02
Attorney, Agent or Firm:
LIEB, Stephen, J. (US)
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