A helmet liner has a central spine, a front panel, and a plurality of arms. First and second side rails each form at least one track. Each of the arms are integrated with the at least one track on one of the first or second side rails. The first end of first and second side rails is secured to the front panel. The second end of each of the first and second side rails forms a cable return channel. Selective lengthening and shortening of first and second loops of cable integrated with a dial system, each loop of the cable being fed through a respective one of the cable return channels at the second end of the first side rail and the second side rail, permits the helmet liner to loosen or causes the helmet liner to tighten, respectively.
Patent
BriefPatent brief
Problem
How can corrosion in underground pipelines and conduits be prevented?
Novelty
First and second side rails each form at least one track.
Uses
Retrofit pipe, Transport pipe, Chemical lines
Assignee
Tool Manufacturing, Inc.
Published
Mar 10, 2026
Inventors
John D. Fiegener
Domain
Infrastructure / energy
Problem
How can corrosion in underground pipelines and conduits be prevented?
Solution
helmet liner has a central spine, a front panel, and a plurality of arms.
Key novelty
First and second side rails each form at least one track.
Applications
Relevant search intents