Weldable, low lead and lead-free plumbing fittings and methods of making the same
US10760693B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2019 |
| Grant date | Sep 1, 2020 |
| Priority date | — |
| Expiry date | Feb 5, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L3/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A plumbing fitting that includes: a fitting body having a plurality of ends; and a cover element joined to the body with a weld in proximity to and spaced from an interface in contact with a potable or non-potable aqueous medium. The body and the cover element are fabricated from a lead-free or low lead, copper or copper-silicon alloy having a thermal conductivity of ≤45 W/(m*K). Further, the weld has a centerline that is ≤6.4 mm from the interface and/or a heat affected zone that has an average width ≤400 μm and is spaced from the interface. The plumbing fittings include but are not limited to ball valves, gate valves, elbows, check valves and other fittings without stems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.