Method of fabricating lead bushings and batteries using same
US5924471A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1997 |
| Grant date | Jul 20, 1999 |
| Priority date | — |
| Expiry date | Jul 30, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D17/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for fabricating bushings for lead-acid cells or batteries is provided which is amenable to automation and control and provides relatively porosity-free bushings comprising utilizing a mold having a cavity in the configuration of the bushing desired and a lead fill unit comprising a lead pot with the molten lead alloy for the bushing and a heated fill line and/or heated fill block wherein the mold and lead fill units are moved into alignment, heating such as induction heating to cause the solidified molten alloy at the end of the heated fill line or in the heated fill block orifice to become molten, gravity filling the mold and then moving the mold and lead fill unit out of alignment, the bushing preferably being cast in an upside-down orientation so as to minimize gas entrainment and/or particulate contamination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.