Automatic opening and closing device for a window
US4870333A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1987 |
| Grant date | Sep 26, 1989 |
| Priority date | — |
| Expiry date | Oct 2, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/45242
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An automatic opening and closing device for a window which has a forwardly and reversely rotatable motor for opening and closing the widow, switching means which instructs said motor to rotate, pulse-detecting means which detects a pulse generated along with a rotation of said motor, counting means which counts a pulse number detected by said pulse-detecting means and rotation-controlling means which performs rotation-control to said motor on basis of a count number counted by said counting means and a predetermined count number is dislosed, by which it is possible to stop the opening or closing action of the window at a halfway, or possible to convert the action of the window in the reverse direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.