Apparatus and method for opening and closing a gate
US4970826A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1989 |
| Grant date | Nov 20, 1990 |
| Priority date | — |
| Expiry date | Nov 24, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/40
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A gate opening and closing apparatus for automatically moving a gate between opened and closed positions and where the gate can be unlatched in order to permit manual opening and closing movement and easily re-latched for automatic movement thereof. The apparatus comprises a powered drive unit. The gate is moveable and, preferably rotatable about a vertical hinge axis, between a pair of opposite end positions. A drive arm forms part of the opening and closing apparatus and is driven in an arcuate path between a pair of end positions which represent a gate open position and a gate closed position. A coupling arm is normally engaged with the drive arm and may be moveable therewith between the opposite end positions represented by movement of the drive arm. A latching arm is provided for latching the coupling arm to the drive arm. A connecting mechanism connects the coupling arm to the gate to translate the movement from the drive arm and the coupling arm to the gate. When the latching arm holds the coupling arm to the drive arm, the coupling arm will provide automatic movement of the gate. The latching arm is capable of being shifted away from the drive arm to preclude automatic move…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.