Radiation therapy equipment
US8487286B2 · kind B2 · utility
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2References
13Claims
0Family size
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Key dates
| Filing date | Aug 24, 2010 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Jun 12, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21K1/046
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Radiation therapy equipment includes a multi-divided irradiation collimator leaf plates for setting irradiation field as approximately close to a target region as possible by avoiding backlashes due to a plurality of gears for driving a plurality of leaf plates. The plurality of leaf plates is respectively connected to a plurality of constant force springs that are coaxially supported by a pair of rotation shafts so as to be constantly forced in a closing direction. Each leaf plate is moved in an opening direction by rolling up a wire connected to the leaf plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.