Controlled atmosphere braze furnace with free part entry
US5605274A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1995 |
| Grant date | Feb 25, 1997 |
| Priority date | — |
| Expiry date | Nov 13, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2101/14
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A vestibule for part entry or exit from a flow through type of braze furnace in which no substantial physical barrier is necessary to prevent air exchange between the vestibule and the outside. A controller burner within the vestibule continually burns oxygen that does leak in, sensing whether combustion is complete trough the use of an analyzer in an exhaust stack. In addition, a neutral gas injector within the vestibule chamber maintains a near net zero pressure balance in order to minimize, though not prevent, ingress leakage. Parts can therefore enter the door freely without dragging through the impediment of a physical barrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.