Control for operating a plurality of window operators
US4933613A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1988 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Dec 16, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/154
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A control for a window operator is operable to control incremental movement of a window. The control includes means for developing a command to selectively move the window in a direction to an open or closed position, and means for determining when a plurality of motor drives have moved the window a preselected incremental distance. Means are coupled to the developing means and the determining means for energizing each of the motor drives if a command is developed, until the motor drives have moved the window the preselected incremental distance and thereafter deenergizing the motor drives until another command is received to move the window a subsequent incremental distance in the selected direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.