Respiratory system heater unit
US8253076B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2007 |
| Grant date | Aug 28, 2012 |
| Priority date | — |
| Expiry date | Nov 9, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F30/16
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A heater unit for a respiratory system is designed for natural convection cooling air to pass first through a transformer in the heater unit and then through a heat sink in the heater unit to which is mounted a power switch to conduct heat from the power switch to the cooling air passing through the heat sink. A thermal break may be provided between the heat sink and the transformer. The transformer may be a toroidal transformer with the air passing through an aperture thereof such as from a hollow projection of the heater unit extending into the aperture. One side of the transformer may be situated along a surface of the heater unit and the heat sink secured to the heater unit against the opposite side of the transformer to hold the transformer in place. A venting chamber may be associated with an air exhaust of the heater unit to provide a circuitous exit path for air exiting the heater unit. The venting chamber may extend in generally surrounding relationship with the heater of the heater unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.