Rail car door closer
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 14, 2009
Grant Date -
Aug 23, 2007
app pub date -
Feb 20, 2007
filing date -
Oct 28, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A track mounted system for closing rail car doors that enables the simultaneous closing of multiple car doors. After hopper car contents such as aggregate or coal are unloaded, the doors are closed in pairs by semi-automated door closing arms that are positioned on the track and are operated by hydraulic cylinders, pneumatic cylinders, or electric motors. The closing arms may be added in pairs depending on the number of doors. Hydraulic cylinders with a differential bell crank can be used to activate the closer arm assemblies. Closer arms can be mounted side by side on the inside or outside of the track or separately inside and outside of the track. Automatic slack adjustment assemblies may be integrated into the closer arm connections to allow for off set door spacing. Individual hydraulic cylinders may be used with each closer arm in an alternate embodiment.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully