Microprocessor controlled garage door operator
US4638433A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 1984 |
| Grant date | Jan 20, 1987 |
| Priority date | — |
| Expiry date | May 30, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2009/00928
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A microprocessor controlled garage door operator which eliminates lower and upper limit switches on the garage door in that the upper and lower limits are set in a program mode of the microprocessor with up and down control switches by the operator. The settings of the door are stored in the memory of the microprocessor. The microprocessor also sets the force limits by establishing them slightly above the actual force required to move the door up and down and this prevents the forces to be set greater than required which could result in a dangerous condition. An external security switch is also connected to the microprocessor of the garage door operator to allow the door to be opened by those knowing the code. In program mode, the user enters in the 4 digit code and the 4 numbers are stored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.