Plastic fitting for flared tubing
US6601879B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2002 |
| Grant date | Aug 5, 2003 |
| Priority date | — |
| Expiry date | Mar 26, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L47/041
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A plastic fitting couples a section of tubing with a concave flared end to a fitting body. In a preferred embodiment, the flared tube has an expanded s-shape in the cross-section and the plastic fitting generally comprises a fitting body and a fitting nut. The fitting body includes an internal nose section having a curvilinear sidewall and a cylindrical surface that have been preformed to substantially match in shape the flare of the tubing. In a preferred embodiment, the nut has external threads that engage internal threads on the fitting body. The fitting nut is threadably coupled to the fitting body and includes a flare-engaging collar which secures the flared end of the tubing to the fitting body through a circumferential point contact. Additional securement of the tubing is provided by an axially inset annular recess, proximate the tapered nose section, which defines a seat sized to receive the end edge of the tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.