Door opener
US6390520B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 10, 2000 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Jul 10, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/702
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An electric door opening mechanism is disclosed which is operable in either a fail safe and a fail secure mode. The electric door opening mechanism comprises a housing having a cutout portion with an opening adapted to receive a bolt of a door. At least one keeper arm is pivotally mounted to the housing. The keeper arm has a locked position occluding the opening and an open position which allows the bolt to be inserted and withdrawn from the opening. A transmission lever pivotally mounted to the housing releasably engages each keeper arm. When the keeper arm and the transmission lever are engaged, the transmission lever holds the keeper arm in the locked position. A release lever pivotally mounted to the housing is adapted to engage the transmission lever. The release lever has three positions, a first unlocked position, a second locked position and a third unlocked position. When the release lever is in the locked position, it holds the transmission lever in engagement with the keeper arm. The device has a source of electrical power which is used to move the release lever between positions. The device also permits the user to select either a fail safe or a fail secure mode in whic…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.