The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 25, 1985
Filed:
Jun. 07, 1982
Applicant:
Inventor:
Roger Engdahl, St. Paul, MN (US);
Assignee:
Proform, Inc., Minneapolis, MN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B61D / ;
U.S. Cl.
CPC ...
105377 ; 49116 ; 296100 ; 105240 ;
Abstract
An opening cover of fiberglass is provided for hopper railroad cars, whereby the car may be loaded from above by causing the halves of the cover to move outward through a cable drive system. The covers are of an aero-dynamic shape which provides for negative lift and drag. By employing light-weight materials and an aero-dynamic shape, substantial advantages in fuel cost and consumption can be achieved, while providing for easy loading and protection of cargo through the translational movement of the cover halves.