ION filter apparatus and method of production thereof
US5389785A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1993 |
| Grant date | Feb 14, 1995 |
| Priority date | — |
| Expiry date | Apr 28, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/4255
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to an ion filter and a method for the production of the ion filter. The ion filter comprises a plurality of elongated solid, rod assemblies. Typically, four rod assemblies, corresponding to four rod electrodes, are utilized. Each rod assembly has a curved rod surface, and at least two abutment surfaces. In one embodiment, the rod is hyperbolic in curvature. These surfaces are formed with one profiled grinding tool simultaneously in such a manner and angle of contact from a processing direction such that no undercuts are formed from this processing direction. The abutment surfaces are shaped such that one abutment surface of one rod assembly can be aligned with another abutment surface of another rod assembly when the rod surfaces are directed toward a longitudinal axis located in the interior of the ion filter. The rod assemblies are electrically insulated from each other with an insulating piece adhesively bonded to each rod assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.