Hydraulic railroad car door with program plate
US4170845A · kind A · utility
7Cited by
3References
18Claims
0Family size
Inventor
Key dates
| Filing date | Aug 16, 1976 |
| Grant date | Oct 16, 1979 |
| Priority date | — |
| Expiry date | Aug 16, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05B81/52
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hydraulic railroad car door assembly comprising a sliding door of the plug type carried on crank arms rotated by shafts rotating with respect to the door, the door opening and closing by the swinging of the crank arms which are carried by tracks on which the door slides, a program plate slidably mounted on the door and having slots therein, door latching assemblies, and means including pins received in the slots for causing sequenced unlatching and door opening and sequenced door closing and latching as said program plate is reciprocated by a cylinder controlled by a hydraulic pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.