Canister cover heater for automotive vapor canister
US4778495A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1986 |
| Grant date | Oct 18, 1988 |
| Priority date | — |
| Expiry date | Jun 23, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A cover for an automotive vapor canister has a heat-spreading member heated by a self-regulating electrical resistance heater of positive temperature coefficient of resistivity for heating air which is periodically introduced into the canister for purging the canister. The cover has a first cover means of thermally insulating material defining a thin inner air flow path section to pass air being introduced into the canister over the heat-spreading member for transferring heat to the air and to receive additional heat within the first cover means and has a second cover means of thermally insulating material defining a thin outer air flow path section overlying and connected with the inner air flow path section to pass the air over the first cover means prior to being advanced into the inner flow path section for withdrawing said additional heat from the first cover means to preheat the air and improve air heating efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.