Desoldering method and apparatus with minimum vacuum on-time control
US5579982A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1995 |
| Grant date | Dec 3, 1996 |
| Priority date | — |
| Expiry date | Jun 30, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2101/40
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A control circuit for a vacuum desoldering apparatus includes a timing mechanism to ensure that vacuum is maintained for a necessary minimum amount of time, even if a vacuum actuation switch of the desoldering tool is prematurely deactivated by the operator. If the operator presses the vacuum actuator switch for a period of time longer than the predetermined minimum time, vacuum will flow until the switch is released. However, if the operator actuates the switch very briefly, that is, for less than the predetermined minimum vacuum actuation time, the vacuum supply is maintained in an activated state for the predetermined minimum time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.