Hopper gate actuating mechanism
US3933100A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1974 |
| Grant date | Jan 20, 1976 |
| Priority date | — |
| Expiry date | Jul 31, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61D7/20
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
This application discloses a sliding gate the top surface of which is tapered so that as it is closed the top surface will compress against a first elastomeric sealing means to eliminate lading leakage, and move away from the lading as the gate is opened, reducing the force required to open the gate. A cam assist mechanism is combined with the inclined gate to further reduce the required opening torque. The gate may be mounted on rollers, which also aid to reduce the opening force required. However, a low friction track may also be utilized to support the gate. In addition to the first elastomeric sealing means, a second elastomeric sealing means may be provided, preferably spring-loaded, at the back edge of the gate to close the gap between the gate and the second sealing means when the gate is opened. The gate may be fabricated from metal plates or utilize a honeycomb sandwich type of construction. The gate may be fabricated so that a rack which is part of the drive mechanism for the gate is imbedded in the honeycomb core so that the outer surface of the rack is flush with the bottom edge of the gate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.