Revolving doors
US4154023A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 6, 1977 |
| Grant date | May 15, 1979 |
| Priority date | — |
| Expiry date | Jun 6, 1997 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/132
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A revolving door comprising at least one upright door element arranged in outwardly extending disposition about an upright axis of revolution, motor means being provided together with control means operable to position the door at a first rotational disposition from which, when the door is turned in one direction by a user pushing against said door element, power assistance is given to the door to effect rotation thereof; limit means being provided to cause the door to then come to rest at said first rotational disposition, in the absence of continued pushing by said user, after movement of the door under action of said motor means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.