Injection molded cold-expansion compression collar
US11541581B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 25, 2017 |
| Grant date | Jan 3, 2023 |
| Priority date | — |
| Expiry date | Jan 15, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2023/0691
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A compression collar is manufactured for reinforcing an interference fit between an end of a pipe and a fitting. A precursor form is injection molded using a cold-expansion material. The precursor form has a tubular body with an initially closed axial end and a bore initially blind formed in the other axial end. Material is removed from the initially closed axial end to form an opening that connects to the bore thereby forming the compression collar. The opening has an inner periphery with a profile in axial cross section that is different than any profile in axial cross section of an inner periphery of the bore. The collar formed lacks knitlines and includes tabs which help to position the collar on a pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.