Regenerative feedback door control device with one-way clutch
US5243735A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1992 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Mar 9, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/18808
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A device for closing swinging doors of the type utilizing a rotating member to compress a spring during door opening to store energy in the spring to effect a closing of the door is provided with a driving connection to a d.c motor/generator effective to cause rotation of the motor during a closing movement of the door. The motor/generator acts as a generator during the closing with the generated electrical energy fed back to the motor/generator to retard rotation of the rotor, providing a brake on the closing movement of the door. The feedback circuitry includes a switch disabling or diminishing the braking during the final degrees of closing movement as well as a variable setting device allowing control of braking force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.