Swing gate operator
US5752344A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1997 |
| Grant date | May 19, 1998 |
| Priority date | — |
| Expiry date | Feb 28, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/40
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A gate opening and closing apparatus, typically referred to as a "gate operator" and which automatically moves a gate, such as a swinging gate between opened and closed positions. The gate operator of the invention employs a power unit, such as an electrically motor driven power unit which rotates a power arm. A crank arm is releasably connected to the power arm and movable therewith. In addition, the crank arm is, in turn, connected to a connecting arm which has one end connected to the gate for movement of the gate. The invention relies upon the use of a swing movement control mechanism in place of stop rings which were previously used to control the limits of movement of the gate. The swing movement control mechanism comprises a swing movement control plate shiftable along the crank arm so that the connecting arm which is also pivoted on the swing movement control plate can be connected to a gate having a desired swing or so-called "throw". The swing movement control mechanism includes an upstanding toggle which controls limit of movement of the connecting arm and also includes a pair of downwardly projecting flanges which also limits the movement of the connecting arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.