Control device for a gas-fired appliance
US6439877B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 23, 2000 |
| Grant date | Aug 27, 2002 |
| Priority date | — |
| Expiry date | Sep 10, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23L11/00
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A device for controlling a gas-fired appliance is provided. The device includes a motor assembly having a shaft extending therefrom and a cam coupled to the shaft for rotation therewith. The cam is coupled to a damper plate of the gas-fired appliance and the plate is configured to rotate with the cam responsive to rotation of the motor shaft. The device further includes a printed circuit board having a control switch mounted thereon. The cam is configured to selectively actuate the control switch upon rotation of the cam. The inventive control device may also include a mounting plate to which the motor assembly and circuit board may be mounted. The mounting plate may be an injection-molded, plastic part. In accordance with the present invention the cam is supported on the printed circuit board as opposed to the mounting plate thereby ensuring an accurate positional relationship between the cam and the control switch. In one embodiment of the invention, a pair of support members are disposed on either side of a housing for the control switch on the printed circuit board and are fastened to the switch housing. The cam is then received and positioned by the support members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.